| Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading | |
| Zhou, Xin1,2; Li, Xiuyan1; Lu, K.1 | |
| Corresponding Author | Li, Xiuyan(xyli@imr.ac.cn) ; Lu, K.(lu@imr.ac.cn) |
| 2019-03-28 | |
| Source Publication | PHYSICAL REVIEW LETTERS
 |
| ISSN | 0031-9007 |
| Volume | 122Issue:12Pages:6 |
| Abstract | The greatly increased grain boundary (GB) mobility in nanograined metals under mechanical loading is distinguished from that in their coarse-grained counterparts. The feature leads to softening of nanograined materials and deviation of strength from the classical Hall-Petch relationship. In this Letter, grain size dependences of GB migration in nanograined Ag, Cu, and Ni under tension were investigated quantitatively in a wide size range. As grain size decreases from submicron, GB migration intensifies and then diminishes below a critical grain size. The GB migration peaks at about 80, 75, and 38 nm in Ag, Cu, and Ni, respectively. The suppression of GB migration below a critical size can be attributed to GB relaxation during sample processing or by postthermal annealing. With relaxed GBs the governing deformation mechanism of nanograins shifts from GB migration to formation of through-grain twins or stacking faults. GB relaxation, analogous to GB segregation, offers a novel approach to stabilizing nanograined materials under mechanical loading. |
| Funding Organization | Ministry of Science & Technology of China ; National Science Foundation of China ; Chinese Academy of Sciences |
| DOI | 10.1103/PhysRevLett.122.126101 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Ministry of Science & Technology of China[2017YFA0204401] ; Ministry of Science & Technology of China[2017YFA0700700] ; Ministry of Science & Technology of China[2012CB932201] ; National Science Foundation of China[51231006] ; Chinese Academy of Sciences[zdyz201701] |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| WOS ID | WOS:000462936100007 |
| Publisher | AMER PHYSICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/132615 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Li, Xiuyan; Lu, K. |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou, Xin,Li, Xiuyan,Lu, K.. Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading[J]. PHYSICAL REVIEW LETTERS,2019,122(12):6. |
| APA | Zhou, Xin,Li, Xiuyan,&Lu, K..(2019).Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading.PHYSICAL REVIEW LETTERS,122(12),6. |
| MLA | Zhou, Xin,et al."Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading".PHYSICAL REVIEW LETTERS 122.12(2019):6. |
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