Acoustic emission behavior during fatigue crack propagation in 304 stainless steel

被引：16

作者：

Oh, KH ^{[1
]}

Jung, CK ^{[1
]}

Yang, YC ^{[1
]}

Han, KS ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Mech Engn, Pohang 790784, South Korea

来源：

ADVANCES IN FRACTURE AND FAILURE PREVENTION, PTS 1 AND 2 | 2004年 / 261-263卷

关键词：

acoustic emission; stress intensity factor; single overload; variable amplitude loading;

D O I：

10.4028/www.scientific.net/KEM.261-263.1325

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study investigated acoustic emission behavior during fatigue crack growth test under constant and variable amplitude loading in 304 stainless steel. To describe the acoustic emission behavior, counts rate(deta/dn) was related with stress intensity factor range (SIFR, DeltaK) in log-log plot. As a result of test, the relationship was represented a curve, which forms rise and fall behavior in counts rate as the SIFR increases. AE response to a single overload was sudden drop and slow recovery in counts rate, which was similar to crack growth retardation behavior. Under block loading, counts rate of each loading block was same as that of constant amplitude loading. Overall experimental results indicated that stress intensity factor controls the counts rate (deta/dn) as well as crack growth rate (da/dn) regardless of load range or crack length.

引用

页码：1325 / 1330

页数：6

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