Formation of multiple twins and their strengthening effect in nanocrystalline Cu/Zr multilayer films

被引：18
|
作者：
Niu, J. J. [1 ]
Zhang, P. [1 ]
Wang, R. H. [2 ]
Zhang, J. Y. [1 ]
Liu, G. [1 ]
Zhang, G. J. [2 ]
Sun, J. [1 ,2 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 539卷
基金：
中国国家自然科学基金;
关键词：
Multilayer films; Multiple twins; Formation mechanism; Strengthening effect; DISLOCATION NUCLEATION; DEFORMATION MECHANISMS; ULTRAHIGH-STRENGTH; MAXIMUM STRENGTH; CU; STRESSES; COPPER;
D O I：
10.1016/j.msea.2012.01.046
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Multiple twins are experimentally observed within Cu grains in nanostructured Cu/Zr multilayer films. Formation of the multiple twins occurs through the sequential emission of partial dislocations not only from the grain boundaries but also from the Cu/Zr interfaces, which are driven by extremely high internal stresses and highly complex stress state caused by the inhomogeneous microstructures. The multilayers with multiple twins exhibit hardness higher than those with single or coplanar twins, indicative of a significant strengthening effect of the multiple twins. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：68 / 73
页数：6
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