层厚度和应变率对铜-金复合纳米线力学性能影响的模拟研究

樊倩; 徐建刚; 宋海洋; 张云光

doi:10.7498/aps.64.016201

摘要

采用分子动力学模拟方法, 研究了层厚度和应变率对铜-金多层复合纳米线在均匀拉伸载荷下力学性能的影响, 并分析了铜-金位错成核机理. 研究结果表明, 随着铜-金层厚度的增加, 复合材料的屈服强度也随之增大; 高应变率时复合材料的力学性能比低应变率时要强, 低应变率的塑性形变主要是位错运动和孪晶形变, 而高应变率主要以单原子运动为主, 表现出了非晶化. 该研究对制备高性能的多层复合材料提供了一定的理论依据.

关键词:

Abstract

Effects of individual layer thickness and strain rate on the mechanical behavior of copper-gold multilayer nanowires as well as the dislocation nucleation mechanism under a uniform tensile loading are investigated using molecular dynamics method. Simulations indicate that the highest yield strength increases with the increase of the individual layer thickness. Furthermore, the result also shows that the mechanical properties in the tensile process at different strain rates are dramatically different from each other, where the dislocation motion and twinning deformation are at a lower strain rate, while the individual atoms are at a higher strain rate for leading to amorphization. The general conclusions derived from this work can provide a guideline for the design of high performance multilayer composite materials.

Keywords:

作者及机构信息

1.
西安邮电大学理学院, 西安 710121;

2.
西安石油大学材料科学与工程学院, 西安 710065

基金项目: 国家自然科学基金(批准号: 10902083)、教育部新世纪优秀人才支持计划(批准号: NCET-12-1046)、陕西省青年科技新星支持计划(批准号: 2012KJXX-39)和陕西省自然科学基础研究计划项目(批准号: 2014JQ1036)资助的课题.

Authors and contacts

1.
School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, China;

2.
College of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 10902083), the Program for New Century Excellent Talents in University, China (Grant No. NCET-12-1046), the New Scientific and Technological Star of Shaanxi Province, China (Grant No. 2012KJXX-39), and the Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2014JQ1036).

参考文献

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施引文献

[1]	Xu S, Guo Y F 2013 Acta Phys. Sin. 62 196201 (in Chinese) [徐爽, 郭雅芳 2013 62 196201]
[2]	Zhang J H, Li M, Gu F, Liu Q Q 2012 Chin. Phys. B 21 016203
[3]	Gu F, Zhang J H, Xu L H, Liu Q Q, Li M 2011 Chin. Phys. Lett. 28 106102
[4]	Imran M, Hussain F, Rashid M, Ahmad S A 2012 Chin. Phys. B 21 126802
[5]	Li C, Xu J, Li W, Jiang X F, Sun S H, Xu L, Chen K J 2013 Chin. Phys. B 22 107201
[6]	Wang Z G, Huang R, Wen Y H 2012 Acta Phys. Sin. 61 166102 (in Chinese) [汪志刚, 黄娆, 文玉华 2012 61 166102]
[7]	Song H Y, Li Y L 2012 J. Appl. Phys. 112 054322
[8]	An M R, Song H Y 2013 Sci. China Phys. Mech. Astron. 56 1938
[9]	Song H Y, Li Y L 2012 Phys. Lett. A 376 529
[10]	Song H Y, Li Y L, An M R 2014 Comput. Mater. Sci. 84 40
[11]	Song H Y, Li Y L 2012 J. Appl. Phys. 111 044322
[12]	Whang C, Song H Y, An M R 2014 Acta Phys. Sin. 63 046201 (in Chinese) [王琛, 宋海洋, 安敏荣 2014 63 046201]
[13]	Liu Y, Bufford D, Wang H, Sun C, Zhang X 2011 Acta. Mater. 59 1924
[14]	Zhu X F, Zhang G P, Yan C, Zhu S J, Sun J 2010 varPhilos. Mag. Lett. 90 413
[15]	Abdolrahim N, Zbib H M, Bahr D F 2014 Int. J. PLASTICITY 52 33
[16]	Abdolrahim N, Mastorakos I N, Shao S, Bahr D F, Zbib H M 2014 Comput. Mater. Sci 86 118
[17]	Zhang R F, Germann T C, Wang J, Liu X Y, Beyerlein I J 2013 Scripta Mater 68 114
[18]	Shao S, Zbib H M, Mastorakos I N, Bahr D F 2014 Comput. Mater. Sci 82 435
[19]	Mastorakos I N, Abdolrahim N, Zbib H M 2010 Int. J. Mech. Sci 52 295
[20]	Yuan F P, Wu X L 2012 J.Appl.Phys. 111 124313
[21]	Verdier M, Huang H, Spaepen F, Embury J D, Kung H 2006 Philos. Mag. 86 5009
[22]	Sangid M D, Ezaz T, Sehitoglu H, Robertson I M 2011 Acta. Mater. 59 283
[23]	Zbib H M, Overman C T, Akasheh F, Bahr D 2011 Int. J. PLASTICITY 27 1618
[24]	Abdolrahim N, Mastorakos I N, Zbib H M 2010 Phys. Rev. B 81 054117
[25]	Wang J, Misra A 2014 Curr. Opin. Solid. St. M. 18 19
[26]	Kramer D E, Foecke T 2002 Philos. Mag. A 82 3375
[27]	Yan J W, Zhang G P, Zhu X F, Liu H S, Yan C 2013 Philos. Mag 93 434
[28]	Schweitz K O, Chevallier J, Bottiger J 2001 Philos. Mag. A 81 2021
[29]	Beyerlein I J, Wang J, Zhang R F 2013 Acta. Mater. 61 7488
[30]	Wang T, Lu Z X, Yang Z Y 2011 Chin. J. Comput. Mech. 28 147 (in Chinese) [王涛, 卢子兴, 杨振宇 2011 计算力学学报 28 147]
[31]	Chen S D, Zhou Y K, Soh A K 2012 Comput. Mater. Sci 61 239
[32]	Lin S J, Wu C D, Fang T H, Kuo L M 2012 Comput. Mater. Sci 59 114
[33]	Li Y P, Zhu X F, Tan J, Wu B, Zhang G P 2009 Philos. Mag. Lett. 89 66
[34]	Li Y P, Zhu X F, Zhang G P, Tan J, Wang W, Wu B 2010 Philos. Mag. 90 3049
[35]	Crone J C, Kbap J, Chung P W, Rice B M 2011 Appl. Phys. Lett. 98 141910
[36]	Hockney R W 1970 Methods Comput. Phys. 9 136
[37]	Zhou X W, Wadley H N G, Johnson R A, Larson D J, Tabat N, Cerezo A, Long A K P, Smith G D W, Clifton P H, Martens R L, Kelly T F 2001 Acta. Mater. 49 4005
[38]	Wadley H N G, Zhou X, Johnson R A, Neurock M 2001 Prog. Mater. Sci. 46 329
[39]	Faken D, Jonsson H 1994 Comput. Mater. Sci. 2 279
[40]	Stukowski A 2010 Modelling Simul. Mater. Sci. Eng. 18 015012
[41]	Cheung K S Yip S 1991 J. Appl. Phys. 70 5688
[42]	Diao J, Gall K, Dunn M L, Zimmerman J A 2006 Acta. Mater. 54 643
[43]	Ma F, Ma S L, Xu K W, Chu P K 2007 Nanotechnology 18 455702

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