Microstructure and microhardness evolutions of Cu47.5Zr47.5Al5 bulk metallic glass processed by rolling

被引：39
作者：
Cao, Q. P. [1 ,2 ,3 ]
Li, J. F. [1 ]
Zhou, Y. H. [1 ]
Jiang, J. Z. [2 ,3 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
[2] Zhejiang Univ, Dept Mat Sci & Engn, Lab New Struct Mat, Hangzhou 310027, Peoples R China
[3] Zhejiang Univ, ICNSM, Hangzhou 310027, Peoples R China
来源：
SCRIPTA MATERIALIA | 2008年 / 59卷 / 06期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
metallic glasses; rolling; microstructure; hardness; free volume;
D O I：
10.1016/j.scriptamat.2008.05.023
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Bulk Cu47.5Zr47.5Al5 metallic glass was rolled at different strain rates and temperatures. No phase transformation occurs in the as-rolled specimens except for shear bands. Free volume monotonously increases with increasing strain, and the rate of increase becomes larger with increasing strain rate or decreasing temperature. However, after an initial rise, the microhardness drops when the strain exceeds a critical value dependent on the rolling conditions. The increase in hardness is proved to result from the interaction of shear bands. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：673 / 676
页数：4
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