MD simulations of loading rate dependence of detwinning deformation in nanocrystalline Ni

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	MD simulations of loading rate dependence of detwinning deformation in nanocrystalline Ni
	Su H(宿昊); Tang QH(汤奇恒); Tang, QH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
发表期刊	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2013-03
卷号	56 期号:3 页码:491-497
ISSN	1674-7348
摘要	Molecular dynamics simulations are performed to investigate the deformation behavior of nanocrystalline Ni with pre-twin atom structure. The simulation sample is composed of four grains with average size 12 nm. The simulation technique of isobaric-isothermal ensemble (NPT) with high pressure is applied to obtain a sample with two circle twins. Under uniaxial tensile and shear loading, as well as different detwinning deformation behaviors are observed. Under uniaxial tension the detwinning deformation is induced by the event of grain growth, and it is supported by local energy analysis. Under the shear loading the detwinning deformation is related to the loading rate. The results show that there may be a critical shear rate. As the shear rate is sufficiently high the circle twin is found to be failed; as the shear rate is less than that rate, the size of circle twin become smaller and gradually approach a constant value. Our simulation results are in good agreement with experiment observation.
关键词	Molecular Dynamics Simulation Detwinning Loading Rate
学科领域	损伤、破坏机理和微结构演化
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000314912300002
项目资助者	National Natural Science Foundation of China [11021262, 11172303, 11132011]; National Basic Research Program of China [2012CB937500]
课题组名称	LNM固体物理力学
论文分区	二类/Q3
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47116
专题	非线性力学国家重点实验室
通讯作者	Tang, QH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Su H,Tang QH,Tang, QH . MD simulations of loading rate dependence of detwinning deformation in nanocrystalline Ni[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2013,56,3,:491-497.
APA	Su H,Tang QH,&Tang, QH .(2013).MD simulations of loading rate dependence of detwinning deformation in nanocrystalline Ni.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,56(3),491-497.
MLA	Su H,et al."MD simulations of loading rate dependence of detwinning deformation in nanocrystalline Ni".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 56.3(2013):491-497.

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