期刊
MATERIALS TRANSACTIONS
卷 55, 期 1, 页码 19-24出版社
JAPAN INST METALS & MATERIALS
DOI: 10.2320/matertrans.MA201310
关键词
Hall-Petch relationship; yield stress; dislocation; grain boundary; strength; ultrafine-grained metal; strain rate; temperature; thermal activation
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [22102006]
- Grants-in-Aid for Scientific Research [22102006] Funding Source: KAKEN
Models and theories to explain the Hall-Petch relationship are reviewed briefly. Then, a dislocation model to incorporate some characteristic mechanical properties of ultrafme-grained and nanocrystalline metals will be introduced and used to explain some experimental results. The model is based on the idea that dislocations emitted from grain boundaries and bow out into grain interiors during their propagation are responsible for plastic deformation and thermally-activated depinning process at grain boundaries is regarded to be rate controlling. Some implications of the model are discussed in the light of recent experimental results.
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