Fatigue crack propagation of super duplex stainless steel with dispersed structure and time-frequency analysis of acoustic emission

被引：0
|
作者：
Ki-Woo Nam
Chang-Yong Kang
Jae-Yoon Do
Seok-Hwan Ahn
Sang-Kee Lee
机构：
[1] Pukyong National University,College of Engineering
[2] Pusan Polytechnic College,Department of Computer Aided Mechanical
来源：
Metals and Materials International | 2001年 / 7卷
关键词：
super duplex stainless steel; heat treatment; time-frequency analysis; fatigue;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The fatigue crack propagation of super duplex stainless steel was investigated for the effect of various volume fractions of the austenite phase by changing the heat treatment temperature. We also analyzed acoustic emission signals obtained during the fatigue crack propagation by the time-frequency analysis method. As the temperature of the heat treatment increased, the volume fraction of austenite decreased and coarse grain was obtained. The specimen treated at 1200 had a longer fatigue life and slower rate of crack growth. Results of time-frequency analysis of acoustic emission signals during the fatigue test showed the main frequency of 200-300 kHz to have no correlation with heat treatment and crack length, and the 500 kHz signal to be due to dimples and separation of inclusion.
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页码：227 / 231
页数：4
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