Size effect and boundary type on the strengthening of nanoscale domains in pure nickel
文献类型：期刊论文
| 作者 | Yuan FP(袁福平) ; Wu XL(武晓雷)
|
| 刊名 | Materials Science and Engineering A
 |
| 出版日期 | 2015-11-11 |
| 卷号 | 648页码:243-251 |
| ISSN号 | 0921-5093 |
| 关键词 | Dislocation Orowan's strengthening Molecular dynamics Pinning strength Nano-domains |
| 通讯作者 | Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 North 4th Ring,West Rd, Beijing 100190, Peoples R China. |
| 产权排序 | [Yuan, Fuping; Wu, Xiaolei] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 中文摘要 | A series of large-scale molecular dynamics simulations were carried out to investigate the interactions between an extended edge dislocation (1/2 < 112 > (111)) and nanoscale domains in pure nickel. The pinning strength of nano-domains and the corresponding atomistic interaction mechanisms were found to be closely related to the domain boundary type, the domain size and spacing. The pinning strengths were found to be higher for high-angle domains than those for low-angle domains at the same size scale, and increase with increasing domain size and decreasing domain spacing. Unlike the by-pass via interactions between the dislocation and boundaries for high-angle domains (much like the role of hard precipitates in alloys), the dislocation was found to cut partly through the low-angle domains. Thus the dragging force from the boundary segments of the low-angle domains should be smaller when compared to the Orowan's strengthening for "hard particles", such as high-angle domains. The predictions from Ashby's model on Orowan's strengthening are higher than the simulation data for low-angle domains, while agree relatively well with those for high-angle domains. Moreover, a more universal model was proposed to connect the dislocation line shape at the critical shear strain with the pinning strength. (C) 2015 Elsevier B.V. All rights reserved. |
| 类目[WOS] | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 分类号 | 一类 |
| 研究领域[WOS] | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | SEVERE PLASTIC-DEFORMATION ; NANOSTRUCTURED METALS ; PRECIPITATE SHAPE ; TENSILE DUCTILITY ; MAXIMUM STRENGTH ; ALPHA-IRON ; ALLOYS ; COPPER ; MECHANISMS ; NI |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1016/j.msea.2015.09.071 |
| 语种 | 英语 |
| WOS记录号 | WOS:000363820700032 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/58336]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yuan FP,Wu XL. Size effect and boundary type on the strengthening of nanoscale domains in pure nickel[J]. Materials Science and Engineering A,2015,648:243-251. |
| APA | 袁福平,&武晓雷.(2015).Size effect and boundary type on the strengthening of nanoscale domains in pure nickel.Materials Science and Engineering A,648,243-251. |
| MLA | 袁福平,et al."Size effect and boundary type on the strengthening of nanoscale domains in pure nickel".Materials Science and Engineering A 648(2015):243-251. |
入库方式： OAI收割
来源：力学研究所
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