Low-cycle fatigue properties of ultrafine-grained zinc-22 wt.% aluminum alloy during room-temperature superplastic flow

被引：11
|
作者：
Tanaka, Tsutomu [1 ]
Kushibe, Atsumichi [2 ]
Kohzu, Masahide [1 ]
Takigawa, Yorinobu [1 ]
Higashia, Kenji [1 ]
机构：
[1] Osaka Prefecture Univ, Dept Mat Sci, Naka Ku, Sakai, Osaka 5998531, Japan
[2] Takenaka Corp, Inst Res & Dev, Chiba 2701395, Japan
来源：
SCRIPTA MATERIALIA | 2008年 / 59卷 / 02期
关键词：
low-cycle fatigue; superplasticity; J-integral; crack-propagation rate; Zn-22Al alloy;
D O I：
10.1016/j.scriptamat.2008.03.005
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Low-cycle fatigue behavior during room-temperature superplastic flow was investigated for ultrafine-grained Zn-22 wt.%Al alloy. This alloy exhibited a longer fatigue life and a lower crack propagation rate than other materials at high strain amplitudes above +/-5%. In addition, many cavities and secondary cracks were observed near the tips of cracks. These are probably responsible for the apparent reduction in the crack propagation rate and the long fatigue lifetime of this alloy. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：215 / 218
页数：4
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