金属强度的尺寸效应*
黄晓旭, 男, 1963年生, 资深研究员
收稿日期: 2014-01-08
修回日期: 2014-01-08
网络出版日期: 2014-02-20
基金资助
*丹麦国家研究基金项目DNRF86-5和国家自然科学基金项目51261130091资助
SIZE EFFECTS ON THE STRENGTH OF METALS
Received date: 2014-01-08
Revised date: 2014-01-08
Online published: 2014-02-20
Supported by
Supported by Danish National Research Foundation (No.DNRF86-5) and National Natural Science Foundation of China ( No.51261130091)
黄晓旭 . 金属强度的尺寸效应*[J]. 金属学报, 2014 , 50(2) : 137 -140 . DOI: 10.3724/SP.J.1037.2014.00016
The grain size effect and the specimen size effect on the strength of metals are briefly reviewed with respect to their history and current status of research. It is revealed that the fundamental strengthening mechanisms responsible for these two types of size effect are to increase the resistance to dislocation motion and to dislocation generation, respectively. It is shown that both strengthening mechanisms take place in some nanostructured metals, which leads to a suggestion to use these two mechanisms for optimizing the strength and ductility of nanostructured metals. This suggestion is verified by some results obtained in nanostructured pure aluminum.
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