期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到161篇文章
< 1 2 … 9 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Rejuvenation and Memory Effects in WCA Systems:A Free-Volume Perspective on Hierarchical Relaxation Dynamics 认领 引用
1
作者 Yifan Yang Yaozhang Yang +2 位作者 Zhenhua Wang Yuyuan Lu Lijia An 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2026年第3期423-432,I0076,I0077,共10页
This study offers a comprehensive analysis of the rejuvenation and memory effects observed during temperature cycling in five-component Weeks-Chandler-Andersen(WCA)systems,utilizing molecular dynamics simulations.We i... This study offers a comprehensive analysis of the rejuvenation and memory effects observed during temperature cycling in five-component Weeks-Chandler-Andersen(WCA)systems,utilizing molecular dynamics simulations.We investigate the molecular mechanisms driving these effects from a free volume perspective.Our findings reveal that dynamical processes and structural evolution at varying temperatures operate independently across multiple spatiotemporal scales,thereby highlighting a distinct decoupling of multiscale dynamics within glassy systems.Notably,while the total free volume remains constant over time,a pronounced peak in large free volume is observed during the second stage of temperature cycling.This peak is intricately linked to the aggregation of free volume,a key factor facilitating rejuvenation dynamics.Furthermore,our analysis shows that free volume aggregation primarily occurs in localized regions,which corresponds to the activation of secondary potential wells within the energy landscape.Critically,this process develops independently of large-scale structural changes,thus preserving the system’s memory effects.By emphasizing the crucial role of free volume in the emergence of marginally stable phases and rejuvenation phenomena,this study advances the theoretical understanding of non-equilibrium dynamics and provides valuable molecular insights into the complex physical behaviors inherent to glassy states. 展开更多
关键词 Aging Rejuvenation Memory effects Free volume Weeks-Chandler-Ander-sen system
暂未订购 下载PDF
Synchronously enhancing the plasticity and soft magnetism in Fe-based metallic glasses through memory effect 认领 引用 被引量：1
2
作者 Weihua Zhou Shiyuan Zhang +3 位作者 Lijian Song Juntao Huo Jun-Qiang Wang Yi Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第10期146-152,共7页
Annealing has been a popular method to improve the soft magnetism of metallic glasses (MGs), which however usually makes MGs brittle and difficult to process. Here, it is demonstrated that the embrittled Fe-based MG c... Annealing has been a popular method to improve the soft magnetism of metallic glasses (MGs), which however usually makes MGs brittle and difficult to process. Here, it is demonstrated that the embrittled Fe-based MG can be reductilized and the coercivity can be further lowered through the rejuvenation of memory effect. The synchronous improvement in the plasticity and soft magnetic properties is attributed to the combination effects of releasing much residual stress, decreasing the magnetic anisotropy, and homogenizing the glasses during the rejuvenation process. The current work opens a new perspective to improve the properties of MGs by utilizing the memory effect and holds promising commercial application potential. 展开更多
关键词 Memory effect Rejuvenation Reductilization Soft magnetism Fe-based metallic glass
暂未订购 下载PDF
Effect of Annealing on the Shape Memory Effect and Mechanical Properties of Laser Powder Bed Fusion NiTi Alloy 认领 引用 被引量：1
3
作者 Yunting Guo Mengqi Liu +8 位作者 Chaorui Jiang Ruiyao Liu Jundong Zhang Pengwei Sha Hang Li Zhenglei Yu Zhihui Zhang Zezhou Xu Luquan Ren 《Additive Manufacturing Frontiers》 CSCD 2025年第1期125-135,共11页
The emergence of additive manufacturing technology,particularly laser powder bed fusion,has revitalized NiTi alloy production.However,challenges arise regarding its mechanical properties and diminishing shape memory e... The emergence of additive manufacturing technology,particularly laser powder bed fusion,has revitalized NiTi alloy production.However,challenges arise regarding its mechanical properties and diminishing shape memory effect,which hinder its widespread application.Heat treatment has been identified as a method to enhance the performance of metallic materials in the realm of additive manufacturing.This process eliminates residual stress and enhances performance through precipitation strengthening.This study conducted a comprehensive annealing investigation on NiTi alloys to explore the impact of annealing time and temperature on the phase transformation behavior and shape memory performance.The mechanism underlying the performance enhancement was analyzed using scanning electron microscopy,energy-dispersive X-ray spectroscopy,electron backscatter diffraction,and transmission electron microscopy.The findings revealed that different annealing conditions resulted in multistep phase transformation behavior,with the 500℃-5 h sample exhibiting the best mechanical properties owing to the formation of nanoscale dispersed precipitates like Ni4Ti3.However,higher temperatures led to larger precipitates,significantly weakening the properties of the NiTi alloy.Additionally,the annealing treatment did not have a notable impact on the grain size,texture strength,or direction.This study provides valuable insights for optimizing the heat treatment process of LPBF-NiTi alloys. 展开更多
关键词 Annealing LPBF-NiTi Shape memory effect Mechanical properties Precipitates
暂未订购 下载PDF
Active manipulation of the optical spectral memory effect via scattering eigenchannels 认领 引用
4
作者 Daixuan Wu Jinye Du +11 位作者 Yuecheng Shen Jiawei Luo Zhengyang Wang Jiaming Liang Zhiling Zhang Dalong Qi Yunhua Yao Lianzhong Deng Meng Liu Zhenrong Sun Zhi-Chao Luo Shian Zhang 《Advanced Photonics Nexus》 CSCD 2025年第2期135-145,共11页
The spectral memory effect in scattering media is crucial for applications that employ broadband illumination,as it dictates the available spectral range from independent scattering responses.Previous studies mainly c... The spectral memory effect in scattering media is crucial for applications that employ broadband illumination,as it dictates the available spectral range from independent scattering responses.Previous studies mainly considered a passive result with the average impact of the scattering medium,whereas it is vital to actively enhance or suppress this effect for applications concerned with large spectral range or fine resolution.We construct an analytical model by integrating the concepts of wave-based interference and photon-based propagation,which manifests a potential physical image for active manipulation by utilizing scattering eigenchannels.Our theoretical predictions indicate that the spectral memory effect is enhanced using high-transmission eigenchannels while it is suppressed using low-transmission eigenchannels.These predictions are supported by finite-difference time-domain simulations and experiments,demonstrating that the spectral memory effect’s range can be actively manipulated.Quantitatively,the experiments achieved variations in enhancement and suppression that exceeded threefold(∼3.27).We clarify the underlying principles of the spectral memory effect in scattering media and demonstrate active manipulation of multispectral scattering processes. 展开更多
关键词 wavefront shaping spectral memory effect transmission matrix
暂未订购 下载PDF
Compressive mechanical properties and shape memory effect of NiTi gradient lattice structures fabricated by laser powder bed fusion 认领 引用 被引量：21
5
作者 Wei Chen Dongdong Gu +3 位作者 Jiankai Yang Qin Yang Jie Chen Xianfeng Shen 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2022年第4期189-205,共17页
Laser additive manufacturing (AM) of lattice structures with light weight, excellent impact resistance, and energy absorption performance is receiving considerable attention in aerospace, transportation, and mechanica... Laser additive manufacturing (AM) of lattice structures with light weight, excellent impact resistance, and energy absorption performance is receiving considerable attention in aerospace, transportation, and mechanical equipment application fields. In this study, we designed four gradient lattice structures (GLSs) using the topology optimization method, including the unidirectional GLS, the bi-directional increasing GLS, the bi-directional decreasing GLS and the none-GLS. All GLSs were manufactureed by laser powder bed fusion (LPBF). The uniaxial compression tests and finite element analysis were conducted to investigate the influence of gradient distribution features on deformation modes and energy absorption performance of GLSs. The results showed that, compared with the 45° shear fracture characteristic of the none-GLS, the unidirectional GLS, the bi-directional increasing GLS and the bi-directional decreasing GLS had the characteristics of the layer-by-layer fracture, showing considerably improved energy absorption capacity. The bi-directional increasing GLS showed a unique combination of shear fracture and layer-by-layer fracture, having the optimal energy absorption performance with energy absorption and specific energy absorption of 235.6 J and 9.5 J g-1 at 0.5 strain, respectively. Combined with the shape memory effect of NiTi alloy, multiple compression-heat recovery experiments were carried out to verify the shape memory function of LPBF-processed NiTi GLSs. These findings have potential value for the future design of GLSs and the realization of shape memory function of NiTi components through laser AM. 展开更多
关键词 additive manufacturing laser powder bed fusion gradient lattice structures deformation behavior shape memory effect
暂未订购 下载PDF
Magnetic reversal and magnetic memory effect in melt-spun Pr_2Fe14B/α-Fe nanocomposite ribbons 认领 引用 被引量：4
6
作者 韩广兵 苏浩 +5 位作者 高汝伟 于淑云 康仕寿 朱明刚 李卫 X.B.Liu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2015年第12期1303-1309,共7页
The influence of CoCr addition on the microstructure and magnetic properties was investigated in nanocomposite Pr2Fel4B/a-Fe alloys prepared by melt spinning. It was shown that the magnetic properties of Pr2Fel4B/ct-F... The influence of CoCr addition on the microstructure and magnetic properties was investigated in nanocomposite Pr2Fel4B/a-Fe alloys prepared by melt spinning. It was shown that the magnetic properties of Pr2Fel4B/ct-Fe nanocomposite were im- proved by an addition of 10 at.% CoCr, in particular, coercivity （Hc） from 4.9 up to 5.3 kOe, maximum energy product （（BH）max） from 10.6 up to 13.9 MGOe, and remanence （Mr） from 94.2 up to 98.4 emu/g. The field dependencies of the reversible and irreversible magnetization components were derived from the recoil loops. Combining with the initial magnetization curves, the results indi- cated that the pinning of domain walls at the grain boundaries dominated the magnetization reversal in Pr2Fe14B/ct-Fe nanocomposite alloys. The magnetic memory effect was studied by measuring the magnetic moment relaxation at a cycle negative magnetic field with time interval of 600 s. The exchange-spring magnets with magnetic memory effect have a high potential for high density magnetic recording. 展开更多
关键词 magnetization reversal exchange coupling magnetic memory effect nanocomposite alloys coercivity rare earths
暂未订购 下载PDF
A macroscopic multi-mechanism based constitutive model for the thermo-mechanical cyclic degeneration of shape memory effect of NiTi shape memory alloy 认领 引用 被引量：9
7
作者 Chao Yu Guozheng Kang Qianhua Kan 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2017年第3期619-634,共16页
A macroscopic based multi-mechanism constitutive model is constructed in the framework of irreversible thermodynamics to describe the degeneration of shape memory effect occurring in the thermo-mechanical cyclic defor... A macroscopic based multi-mechanism constitutive model is constructed in the framework of irreversible thermodynamics to describe the degeneration of shape memory effect occurring in the thermo-mechanical cyclic deformation of NiTi shape memory alloys (SMAs). Three phases, austenite A, twinned martensite and detwinned martensite , as well as the phase transitions occurring between each pair of phases (, , , , and are considered in the proposed model. Meanwhile, two kinds of inelastic deformation mechanisms, martensite transformation-induced plasticity and reorientation-induced plasticity, are used to explain the degeneration of shape memory effects of NiTi SMAs. The evolution equations of internal variables are proposed by attributing the degeneration of shape memory effect to the interaction between the three phases (A, , and and plastic deformation. Finally, the capability of the proposed model is verified by comparing the predictions with the experimental results of NiTi SMAs. It is shown that the degeneration of shape memory effect and its dependence on the loading level can be reasonably described by the proposed model. 展开更多
关键词 NiTi SMAs Constitutive model Cyclic degeneration of shape memory effect Transformation-induced plasticity Reorientation-induced plasticity
暂未订购 下载PDF
Memory Effect of Crystallization in 1-Butene/α-olefin Copolymers 认领 引用 被引量：6
8
作者 Chun-Jing Qv Wei Li +1 位作者 Rui-Jun Zhao Zhe Ma 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2022年第6期576-583,共8页
The macromolecular architecture is the crucial factor in determining the arrangement of the ordering structures,which,because of the multiscale feature,may exhibit distinct melting behaviors and induce the so-called m... The macromolecular architecture is the crucial factor in determining the arrangement of the ordering structures,which,because of the multiscale feature,may exhibit distinct melting behaviors and induce the so-called memory effect to affect the following recrystallization.Until present,the correlation between the occurrence of memory effect and the intrinsic molecular structure is still far from the comprehensive understanding.In this work,four kinds of 1-butene/α-olefin random copolymers were designed and synthesized using the(pyridyl-amino)hafnium catalyst to introduce the different branches.The branch length was precisely controlled by the specific α-olefin comonomers,which include 1-hexene,1-decene,1-tetradecene,and 1-octadecene,while the branch density was tuned by the incorporation.As expected,the incorporation of α-olefin co-units to poly(1-butene)backbone decreases the non-isothermal crystallization kinetics and the degree of crystallinity.More interestingly,the resulting linear branch can induce the occurrence of memory effect and the threshold concentration of co-units(i.e.,branch density)decreases with increasing the branch length.Based on the results of these 1-butene/α-olefin copolymers with designable branches,a direct correlation with the occurrence of memory effect and the fraction of amorphous region was established,which quantitatively indicates the degree of local segregation of the crystallized poly(1-butene)sequences by theα-olefin co-units. 展开更多
关键词 Memory effect 1-Butene/α-olefin copolymer Linear branch Crystallinity
暂未订购 下载PDF
Intrinsic two-way shape memory effect in a Ni-Mn-Sn metamagnetic shape memory microwire 认领 引用 被引量：3
9
作者 Zhen Chen Daoyong Cong +8 位作者 Yin Zhang Xiaoming Sun Runguang Li Shaohui Li Zhi Yang Chao Song Yuxian Cao Yang Ren Yandong Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第10期44-48,共5页
An intrinsic two-way shape memory effect with a fully recoverable strain of 1.0%was achieved in an as-prepared Ni50Mn37.5Sn12.5 metamagnetic shape memory microwire fabricated by Taylor-Ulitovsky method.This two-way sh... An intrinsic two-way shape memory effect with a fully recoverable strain of 1.0%was achieved in an as-prepared Ni50Mn37.5Sn12.5 metamagnetic shape memory microwire fabricated by Taylor-Ulitovsky method.This two-way shape memory effect is mainly owing to the internal stress caused by the retained martensite in austenite matrix,as revealed by transmission electron microscopy observations and highenergy X-ray diffraction experiments.After superelastic training for 30 loading/unloading cycles at room temperature,the amount of retained martensite increased and the recoverable strain of two-way shape memory effect increased significantly to 2.2%.Furthermore,a giant recoverable strain of 11.2%was attained under a bias stress of 300 MPa in the trained microwire.These properties confer this microwire great potential for micro-actuation applications. 展开更多
关键词 Metamagnetic shape memory alloys Two-way shape memory effect Microwire Recoverable strain Microstructure
暂未订购 下载PDF
Memory effect on the pressure-temperature condition and induction time of gas hydrate nucleation 认领 引用 被引量：16
10
作者 Qiang Wu Baoyong Zhang 《Journal of Natural Gas Chemistry》 2010年第4期446-451,共6页
The focus of this study is to investigate the influence of memory effect and the relation of its existence with the dissociation temperature,using gas hydrate formation and dissociation experiments.This is beneficial ... The focus of this study is to investigate the influence of memory effect and the relation of its existence with the dissociation temperature,using gas hydrate formation and dissociation experiments.This is beneficial because memory effect is considered as an effective approach to promote the thermodynamic and dynamic conditions of gas hydrate nucleation.Seven experimental systems(twenty tests in total)were performed in a 1 L pressure cell.Three types of hydrate morphology,namely massive,whiskery and jelly crystals were present in the experiments.The pressures and temperatures at the time when visual hydrate crystals appeared were measured.Furthermore,the influence of memory effect was quantified in terms of pressure-temperature-time(p-T-t)relations.The results revealed that memory effect could promote the thermodynamic conditions and shorten the induction time when the dissociation temperature was not higher than 25℃.In this study,the nucleation superpressure and induction time decrease gradually with time of tests,when the earlier and the later tests are compared.It is assumed that the residual structure of hydrate dissociation,as the source of the memory effect,provides a site for mass transfer between host and guest molecules.Therefore,a driving force is created between the residual structures and its surrounding bulk phase to promote the hydrate nucleation.However,when the dissociation temperature was higher than 25℃,the memory effect vanished.These findings provide references for the application of memory effect in hydrate-based technology. 展开更多
关键词 gas hydrate memory effect nucleation thermodynamics induction time
暂未订购 下载PDF
Solutions and memory effect of fractional-order chaotic system:A review 认领 引用 被引量：3
11
作者 Shaobo He Huihai Wang Kehui Sun 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第6期9-29,共21页
Fractional calculus is a 300 years topic,which has been introduced to real physics systems modeling and engineering applications.In the last few decades,fractional-order nonlinear chaotic systems have been widely inve... Fractional calculus is a 300 years topic,which has been introduced to real physics systems modeling and engineering applications.In the last few decades,fractional-order nonlinear chaotic systems have been widely investigated.Firstly,the most used methods to solve fractional-order chaotic systems are reviewed.Characteristics and memory effect in those method are summarized.Then we discuss the memory effect in the fractional-order chaotic systems through the fractionalorder calculus and numerical solution algorithms.It shows that the integer-order derivative has full memory effect,while the fractional-order derivative has nonideal memory effect due to the kernel function.Memory loss and short memory are discussed.Finally,applications of the fractional-order chaotic systems regarding the memory effects are investigated.The work summarized in this manuscript provides reference value for the applied scientists and engineering community of fractional-order nonlinear chaotic systems. 展开更多
关键词 fractional calculus fractional-order chaotic system numerical approximation memory effect
暂未订购 下载PDF
The regulation of memory effect and its influence on discharge properties of a dielectric barrier discharge driven by bipolar pulse at atmospheric-pressure nitrogen 认领 引用 被引量：2
12
作者 Rui FAN Yaogong WANG +2 位作者 Xigoning ZHANG Zhentao TU Jun ZHANG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2021年第10期150-158,共9页
The regulation of memory effect that the residual charges generated during and after discharge act on the initiation and development of subsequent discharge is explored by adjusting the pulse parameters,which have an ... The regulation of memory effect that the residual charges generated during and after discharge act on the initiation and development of subsequent discharge is explored by adjusting the pulse parameters,which have an influence on the discharge characteristics.The memory effect is quantified by the measurement of‘wall voltage’through a series of reference capacitors.The influences of memory effect on the discharge properties corresponding to rising/falling time50–500 ns,pulse width 0.5–1.5μs,and frequency 200–600 Hz are analyzed.It is found that the‘wall voltage’increases from 1.4 kV to 2.4 kV with rising/falling time from 50 ns to 500 ns,it varies in the range of 0.18 kV with frequency of 200–600 Hz,and 0.17 k V with pulse width of 0.5–1.5μs.The propagation velocity of wavelike ionization under the negative pulse slows down from 2184 km s-1to 1026 km s-1 as the rising/falling time increases from 50 ns to 500 ns due to the weakening of the electric field by the surface memory effect.More intense and uniform emission can be achieved through faster rising/falling time and higher frequency based on the volume memory effect,while pulse width has less influence on the emission uniformity.Furthermore,similar laws are obtained for spectral and discharge intensity.Therefore,the memory effect is most effectively regulated by rising/falling time,and the discharge properties are affected by the surface and volume memory effect. 展开更多
关键词 memory effect discharge properties wall voltage pulse parameters
暂未订购 下载PDF
Three-Dimensional Phase-Field Simulation of Stress-Assisted Two-Way Shape Memory Effect and Its Cyclic Degradation of Single-Crystal NiTi Shape Memory Alloy 认领 引用 被引量：1
13
作者 Bo Xu Chao Yu +2 位作者 Chong Wang Qingyuan Wang Guozheng Kang 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2024年第6期858-872,共15页
In this work,a three-dimensional crystal-plasticity-based phase-field model considering three kinds of inelastic deformation mechanisms,i.e.,martensitic transformation,dislocation slip in austenite,and dislocation sli... In this work,a three-dimensional crystal-plasticity-based phase-field model considering three kinds of inelastic deformation mechanisms,i.e.,martensitic transformation,dislocation slip in austenite,and dislocation slip in martensite,is established to simulate the stress-assisted two-way shape memory effect(SATWSME)of NiTi single crystals and its cyclic degradation.The simulation results show that the ability of the SATWSME of NiTi single crystal increases as increasing the constant stress in the range discussed in this work(10–100 MPa),which is due to the increase of reoriented martensite formed in the cooling process due to the enhanced variant-selection capability of increased constant stress.The martensitic transformation and its reverse in the cyclic process reflecting the SATWSME show more and more obvious localization characteristics,resulting in the accumulation of significantly heterogeneous plastic deformation(mainly caused by the dislocation slip in austenite),which leads to the cyclic degradation of SATWSME.The simulation results and the conclusions drawn from this work are helpful for further understanding the mechanism of functional cyclic degradation of NiTi alloys. 展开更多
关键词 Phase-field NiTi shape memory alloy Crystal plasticity Stress-assisted two-way shape memory effect Cyclic degradation
暂未订购 下载PDF
Two-way Shape Memory Effect in a Ti-Ni-Nb Shape Memory Alloy with Wide Hysteresis 认领 引用 被引量：2
14
作者 Liming WANG Xianglong MENG Wei CAI and Liancheng ZHAO School of Materials Science and Engineering, Harbin institute of Technology, Harbin 150001, China 《Journal of Materials Science & Technology》 SCIE EI CAS 2001年第1期13-14,共2页
A two-way shape memory effect (TWSM E) in the Ti46.3Ni44.7Nb9 alloy has been systematically investigated by means of bending test and transmission electron microscopy (TEM ) observations. Based on the analysis of the ... A two-way shape memory effect (TWSM E) in the Ti46.3Ni44.7Nb9 alloy has been systematically investigated by means of bending test and transmission electron microscopy (TEM ) observations. Based on the analysis of the microstructure after training. the mechanism of TWSME in the Ti46.3 Ni44.7Nb9 alloy has been discussed. 展开更多
关键词 Ti Ni Two-way Shape Memory Effect in a Ti-Ni-Nb Shape Memory Alloy with Wide Hysteresis Wide
暂未订购 下载PDF
Effect of Training on Two-way Shape Memory Effect and Its Stability in a Ti-Ni-Hf High Temperature Shape Memory Alloy 认领 引用 被引量：1
15
作者 XianglongMENG WeiCAI +2 位作者 K.T.LAU L.M.ZHOU LianchengZHAO 《Journal of Materials Science & Technology》 SCIE EI CAS 2003年第6期590-592,共3页
The Effect of the thermal cycling training under constant strain on the two-way shape memory effect (TWSME) in a Ti36l\li49Hf15 high temperature shape memory alloy (SMA) has been investigated by bending tests. The res... The Effect of the thermal cycling training under constant strain on the two-way shape memory effect (TWSME) in a Ti36l\li49Hf15 high temperature shape memory alloy (SMA) has been investigated by bending tests. The results indicated that the training procedure is beneficial to get the better TWSME. The two-way shape memory strain increases with increasing the training strain. And it decreases with increasing the training temperature. The TWSME obtained in the present alloy shows poorer stability compared with that obtained in the TiNi alloys. 展开更多
关键词 TiNiHf alloy High temperature shape memory alloy Two-way shape memory effect Training
暂未订购 下载PDF
EFFECT OF DYNAMIC RECRYSTALLIZATION ON SHAPE MEMORY EFFECT IN Fe-Mn-Si BASED ALLOYS 认领 引用 被引量：2
16
作者 L.J. Rong Y. Y. Li and C.X. Shi 《Acta Metallurgica Sinica(English Letters)》 EI CAS 1996年第5期361-366,共6页
Improvement of shape, memory effect (SME) in Fe-Mn-Si based alloys has been investigated, compared with that by conventional 'training' treatment. It is found that SME in Fe-Mn-Si alloy can be greatly improved... Improvement of shape, memory effect (SME) in Fe-Mn-Si based alloys has been investigated, compared with that by conventional 'training' treatment. It is found that SME in Fe-Mn-Si alloy can be greatly improved by ausforming and 3.8%recovery strain and 2.2% complete recovery strain can be reached by ausforming at 973 K when dynamic recrystallization has just occurred. The mechanism for the improvement of SME is proposed. 展开更多
关键词 shape memory effect dynamic recrystallization Fe-Mn-Si based Alloy
暂未订购 下载PDF
Reaction mechanism between“memory effect”and induction time of gas hydrate formation 认领 引用 被引量：1
17
作者 孙登林 吴强 张保勇 《Journal of Coal Science & Engineering(China)》 2008年第2期280-282,共3页
Abstract Using visual experimental apparatus, one system （T40, 1×10^-3 mol/L, nonadded with coal） and another system （T40, 2×10^-3 mol/L, added with coal） were experimented with for three times and two t... Abstract Using visual experimental apparatus, one system （T40, 1×10^-3 mol/L, nonadded with coal） and another system （T40, 2×10^-3 mol/L, added with coal） were experimented with for three times and two times, respectively. Five groups of P-T experimental parameters were obtained using the data logger system and analyzed combined with the video information of the experiments. Major conclustions show that the induction time is shortened by 10-20 times in the experimental system containing residual pentahedral ring structures; ＂memory effect＂ can accelerate the dynamic progress and improve the thermodynamic conditions of gas hydrate formation. 展开更多
关键词 memory effect induction time thermodynamic condition gas hydrate
暂未订购 下载PDF
Effect of heat treatment on the transformation behavior and temperature memory effect in TiNiCu wires 认领 引用 被引量：3
18
作者 YU Huajun XIANG Xia 《Rare Metals》 SCIE EI CAS 2009年第1期63-67,共5页
The effect of heat treatment on the phase transformation behavior of TiNiCu shape memory alloy wires and the temperature memory effect in this alloy were investigated by the resistance method.These results showed that... The effect of heat treatment on the phase transformation behavior of TiNiCu shape memory alloy wires and the temperature memory effect in this alloy were investigated by the resistance method.These results showed that with increasing annealing temperature and annealing time,the phase transformation temperatures of TiNiCu wires were shifted to higher temperatures in the heating and cooling process.It was also found that incomplete thermal cycles,upon heating the TiNiCu wires,which were arrested at a temperature between the start and finish temperatures of the reverse martensite transformation,could induce a kinetic stop in the next complete thermal cycle.The kinetic stop temperature was closely related to the previous arrested temperature.This phenomenon was defined as the temperature memory effect.The result of this study was consistent with the previous report on the phenomenon obtained using the differential scanning calorimetry method,indicating that temperature memory effect was a common phenomenon in shape memory alloys. 展开更多
关键词 TiNiCu shape memory alloy heat treatment phase transformation temperature temperature memory effect
暂未订购 下载PDF
Shape Memory Effect of As-aged Fe-14Mn-5Si-8Cr-4Ni-0.2C Alloy 认领 引用 被引量：2
19
作者 Yuhua WEN, Ning LI and Mingjing TU 《Journal of Materials Science & Technology》 SCIE EI CAS 2000年第4期424-426,共3页
The effects of aging temperature on shape memory effect, mechanical properties and microstruc-ture of Fe-14Mn-5Si-8Cr-4Ni-0.2C shape memory alloy have been studied. The results showed that the second phase particles r... The effects of aging temperature on shape memory effect, mechanical properties and microstruc-ture of Fe-14Mn-5Si-8Cr-4Ni-0.2C shape memory alloy have been studied. The results showed that the second phase particles rich in chromium, manganese and silicon precipitate during aging, and thereby increase the hardness and strength of the alloy. The shape recovery ratio can be remarkably improved by aging and a maximum value can be obtained at 1223 K, which is 68% higher than that of the specimen in solid solution state. When the aging temperature is below 1223 K, the amount of second phase particles increases as the aging temperature increases. The size of austenite grain increases with increasing aging temperature. When the temperature is over 1223 K, the second phase particles can not precipitate. The lack of second phase particles and the increase of grain size make the hardness and shape recovery ratio drastically decrease, when the temperature is over 1223 K. 展开更多
关键词 Mn Shape Memory Effect of As-aged Fe-14Mn-5Si-8Cr-4Ni-0.2C Alloy As Fe Cr Ni Si
暂未订购 下载PDF
Microstructure and Shape Memory Effect of Cu-26.1Zn-4.8Al Alloy 认领 引用 被引量：1
20
作者 程晓敏 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2008年第5期717-719,共3页
The influence of processing parameters on the microstructure and shape memory effect of Cu-26.1Zn-4.8Al alloy was investigated. The treated specimens were characterized by metallography, X-ray diffraction （XRD） and ... The influence of processing parameters on the microstructure and shape memory effect of Cu-26.1Zn-4.8Al alloy was investigated. The treated specimens were characterized by metallography, X-ray diffraction （XRD） and transmission electron microscopy （TEM） to explain the mechanism of shape memory effect in Cu-26.1Zn-4.8Al alloy. The results reveal that the shape memory effect is markedly increased by appropriate quenching and ageing process. XRD shows that γ phase precipitates from martensite when aged at higher temperature and γ precipitates impair the shape memory effect. TEM analysis indicate that the substructure of plate-like martensite consists of twins and stacking faults. 展开更多
关键词 Cu-Zn-Al alloy shape memory effect microstructure martensite
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 9 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈