Mechanical properties and optimal grain size distribution profile of gradient grained nickel
文献类型：期刊论文
| 作者 | Lin, Y; Pan, J; Zhou, HF; Gao, HJ; Li, Y |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 153页码:279-289 |
| ISSN号 | 1359-6454 |
| 关键词 | Gradient structured metals Grain size distribution Degree of gradient Strength Ductility |
| DOI | 10.1016/j.actamat.2018.04.065 |
| 英文摘要 | Gradient structured (GS) materials are ubiquitous in biological systems and now increasingly adopted in engineering systems to achieve desirable combinations of mechanical properties. However, how to control and characterize the gradient structure still remains challenging. In the present work, pure Ni samples possessing a gradient structure with a change in the grain size up to three orders of magnitude from 29 nm to 4 mu m are prepared by electro-deposition, where the degree of grain size gradient is accurately controlled. The GS Ni samples exhibit a favorable combination of high strength and high ductility. An optimal grain size distribution profile is discovered which gives rise to a yield strength of 460 MPa and a uniform elongation of 8.9%, the latter even better than that of the coarse-grained Ni. Experimental observations and molecular dynamics (MD) simulations reveal that the surface roughening of coarse grains and strain localization of nano-grains can be effectively suppressed by the mutual constraint between nano-grains and coarse grains, leading to the observed superior uniform elongation. This work not only reports a promising methodology of producing materials possessing both high strength and high ductility, but also provides a model for investigating the deformation mechanisms in GS materials. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 学科主题 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000437391500027 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/80115]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.[Lin, Y. 2.Pan, J. 3.Li, Y.] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 4.[Lin, Y.] Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100039, Peoples R China 5.[Zhou, H. F. 6.Gao, H. J.] Brown Univ, Sch Engn, Providence, RI 02912 USA |
| 推荐引用方式 GB/T 7714 | Lin, Y,Pan, J,Zhou, HF,et al. Mechanical properties and optimal grain size distribution profile of gradient grained nickel[J]. ACTA MATERIALIA,2018,153:279-289. |
| APA | Lin, Y,Pan, J,Zhou, HF,Gao, HJ,&Li, Y.(2018).Mechanical properties and optimal grain size distribution profile of gradient grained nickel.ACTA MATERIALIA,153,279-289. |
| MLA | Lin, Y,et al."Mechanical properties and optimal grain size distribution profile of gradient grained nickel".ACTA MATERIALIA 153(2018):279-289. |
入库方式： OAI收割
来源：金属研究所
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