Non-linear ultrasonic technique to assess fatigue damage in structural steel

被引：85
|
作者：
Sagar, S. Palit [1 ]
Das, S.
Parida, N.
Bhattacharya, D. K.
机构：
[1] Natl Met Lab, Jamshedpur 831007, Jharkhand, India
[2] Cent Glass & Ceram Res Inst, Kolkata 700032, W Bengal, India
来源：
SCRIPTA MATERIALIA | 2006年 / 55卷 / 02期
关键词：
non-linear ultrasonic; dislocations; fatigue; total harmonic distortion; harmonics;
D O I：
10.1016/j.scriptamat.2006.03.037
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A non-linear ultrasonic technique has been used to assess the fatigue damage in low carbon structural steel. The percentage of total harmonic distortion, which is the ratio of the amplitude of 2nd harmonic and the fundamental, has been introduced as the measurement parameter in this paper. It has also been observed that before crack initiation the 2nd harmonic amplitude is comparable to the fundamental. The results have been analysed in light of the dislocation theory for harmonic generation during material degradation. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：199 / 202
页数：4
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