Atomistic study on shock behaviour of NiTi shape memory alloy | |
Yin QY(殷秋运); Wu XQ(吴先前); Huang CG(黄晨光); Wu, XQ (reprint author) | |
发表期刊 | PHILOSOPHICAL MAGAZINE |
2017 | |
卷号 | 97期号:16页码:1311-1333 |
ISSN | 1478-6435 |
摘要 | The shock behaviour of NiTi shape memory alloy is investigated by using molecular dynamics simulation. The nano-pillar samples of the alloy are subjected to the impact of a piston with a velocity of 350 m/s at initial environment temperatures of 325 and 500 K. At 325 K, we observe two different pathways of the formation of BCO phase, the gradient twins, and the detwinning phenomena, strongly depending on the local stress and the deformation state. As the initial temperature increases to 500 K, the plasticity is dominated by the dislocation movements rather than the twinning at 325 K. The phase transformation and plasticity result in stress attenuation when the stress wave propagates through the nano-pillar. Furthermore, it is interesting to note that multiple stress peaks occur due to the formation of local complex atomic structures with various wave speeds, leading to the catch up and overlap of the stress waves. |
关键词 | Niti Shape Memory Alloys Molecular Dynamics Phase Transformation Plasticity Stress Waves |
DOI | 10.1080/14786435.2017.1294769 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000399959200003 |
WOS类目 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter |
项目资助者 | National Natural Science Foundation of China 11332011 11402277 |
课题组名称 | LMFS冲击与耦合效应(LHO) |
论文分区 | 二类 |
力学所作者排名 | 1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/60711 |
专题 | 流固耦合系统力学重点实验室 |
通讯作者 | Wu, XQ (reprint author) |
推荐引用方式 GB/T 7714 | Yin QY,Wu XQ,Huang CG,et al. Atomistic study on shock behaviour of NiTi shape memory alloy[J]. PHILOSOPHICAL MAGAZINE,2017,97,16,:1311-1333. |
APA | Yin QY,Wu XQ,Huang CG,&Wu, XQ .(2017).Atomistic study on shock behaviour of NiTi shape memory alloy.PHILOSOPHICAL MAGAZINE,97(16),1311-1333. |
MLA | Yin QY,et al."Atomistic study on shock behaviour of NiTi shape memory alloy".PHILOSOPHICAL MAGAZINE 97.16(2017):1311-1333. |
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