Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading

doi:10.1088/1674-1056/21/10/106202

中国物理B ›› 2012, Vol. 21 ›› Issue (10): 106202-106202.doi: 10.1088/1674-1056/21/10/106202

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading

安敏荣, 宋海洋, 苏锦芳

School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, China

收稿日期:2012-03-14 修回日期:2012-04-16 出版日期:2012-09-01 发布日期:2012-09-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10902083) and the Program for New Scientific and Technological Star of Shaanxi Province, China (Grant No. 2012KJXX-39).

Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading

An Min-Rong (安敏荣), Song Hai-Yang (宋海洋), Su Jin-Fang (苏锦芳)

School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, China

Received:2012-03-14 Revised:2012-04-16 Online:2012-09-01 Published:2012-09-01
Contact: An Min-Rong, Song Hai-Yang E-mail:amr_lr@sohu.com; gsfshy@sohu.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10902083) and the Program for New Scientific and Technological Star of Shaanxi Province, China (Grant No. 2012KJXX-39).

摘要/Abstract

摘要： The effects of twin spacing and temperature on the deformation behavior of nanotwinned Al under tensile loading are investigated using a molecular dynamic (MD) simulation method. The result shows that the yield strength of nanotwinned Al decreases with the increase of twin spacing, which is related to the repulsive force between twin boundary and the dislocation. The result also shows that there is no strain-hardening at the yield point. On the contrary, the stress is raised by strain hardening in the plastic stage. In addition, we also investigate the effects of stacking fault thickness and temperature on the yield strength of the Al nanowire. The simulation results indicate that the stacking fault may strengthen the Al nanowire when the thickness of the stacking fault is below a critical value.

关键词: molecular dynamic simulation, deformation twin, stacking fault

Abstract: The effects of twin spacing and temperature on the deformation behavior of nanotwinned Al under tensile loading are investigated using a molecular dynamic (MD) simulation method. The result shows that the yield strength of nanotwinned Al decreases with the increase of twin spacing, which is related to the repulsive force between twin boundary and the dislocation. The result also shows that there is no strain-hardening at the yield point. On the contrary, the stress is raised by strain hardening in the plastic stage. In addition, we also investigate the effects of stacking fault thickness and temperature on the yield strength of the Al nanowire. The simulation results indicate that the stacking fault may strengthen the Al nanowire when the thickness of the stacking fault is below a critical value.

Key words: molecular dynamic simulation, deformation twin, stacking fault

中图分类号: (Mechanical properties of nanoscale systems)

62.25.-g

61.46.-w (Structure of nanoscale materials) 64.70.Nd (Structural transitions in nanoscale materials)

安敏荣, 宋海洋, 苏锦芳. Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading[J]. 中国物理B, 2012, 21(10): 106202-106202.

An Min-Rong (安敏荣), Song Hai-Yang (宋海洋), Su Jin-Fang (苏锦芳). Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading[J]. Chin. Phys. B, 2012, 21(10): 106202-106202.

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Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading

Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading

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