| 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.
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| Source Publication | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
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| 2013-03 | |
| Volume | 56Issue:3Pages:491-497 |
| ISSN | 1674-7348 |
| Abstract | 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. |
| Keyword | Molecular Dynamics Simulation Detwinning Loading Rate |
| Subject Area | 损伤、破坏机理和微结构演化 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000314912300002 |
| Funding Organization | National Natural Science Foundation of China [11021262, 11172303, 11132011]; National Basic Research Program of China [2012CB937500] |
| Department | LNM固体物理力学 |
| Classification | 二类/Q3 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47116 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Tang, QH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| Recommended Citation 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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