期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.09.117
关键词
Grain size gradient structure; Extra strain hardening; Ductility; Geometrically necessary dislocations; Nano-grained metal
类别
资金
- National Natural Science Foundation of China (NSFC) [11402203]
- Fundamental Research Funds for the Central Universities [3102014JCQ01039]
- Start-up Funds for the Newly-recruited High-level Talents from Northwestern Polytechnical University, China
- NSFC [11125211, 11372317]
- 973 Nano-project [2012CB937500]
- Ministry of Science, Technology and Innovation (MOSTI), Malaysia [06-02-10-SF0195]
- Advanced Engineering Programme
- School of Engineering, Monash University Malaysia
A theoretical model has been developed, which reveals the underlying correlation between the strong extra strain hardening achieved in the nano-grained layers of the grain size gradient structure and the non-uniform deformation of the lateral surface in surface nano-crystallized materials, based on some existing experimental observations and the concept of geometrically necessary dislocations. The proposed model led to the establishment of a simple physical law that can be expressed as H* = A*, where H* and A* are two dimensionless parameters. The former represents the extra strain hardening, while the latter characterizes the non-uniform deformation of the lateral surface. The values of these two parameters can be measured through experiments. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据