Effect of shot peening on the fatigue life of a Zr-based bulk metallic glass

被引：47
|
作者：
Raghavan, R. [1 ]
Ayer, R. [2 ]
Jin, H. W. [2 ]
Marzinsky, C. N. [2 ]
Ramamurty, U. [1 ]
机构：
[1] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India
[2] ExxonMobil Res & Engn Co, Adv Struct Mat Sect, Annandale, NJ 08801 USA
来源：
SCRIPTA MATERIALIA | 2008年 / 59卷 / 02期
关键词：
metallic glasses; nanoindentation; fatigue; shear bands; residual stresses;
D O I：
10.1016/j.scriptamat.2008.03.009
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The fatigue lives of a Zr-based bulk metallic glass (BMG) in the as-cast and shot-peened conditions were evaluated. Results suggest that shot peening does not cause significant enhancement of the fatigue performance of the BMG. Cracks were observed to nucleate in subsurface regions. This was attributed to the domination of the compressive residual stress field on the surface over deformation-induced plastic flow softening that otherwise leads to easy nucleation of shear bands which act like microcracks. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：167 / 170
页数：4
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