Residual Stress Measurement by L<TEX>$_{CR}$</TEX> Wave and Acoustic Emission Characteristics from Fatigue Crack Propagation in STS316L Weldment

J. Ocean Eng. Technol. 2003;17(1):47-54.

Residual Stress Measurement by L$_{CR}$ Wave and Acoustic Emission Characteristics from Fatigue Crack Propagation in STS316L Weldment

STS316L용접재의 표면파에 의한 잔류응력 측정과 균열진전시의 음향방출특성

남기우,박소순,안석환

부경대학교 공과대학,부경대학교 대학원,부경대학교 공과대학

Keywords: Residual Stress, L$_{CR}$ Wave, Acoustic Emission, Fatigue Crack Propagation, Time-Frequency Analysis Method

핵심용어: 잔류응력, 표면파, 음향방출, 피로균열전파, 시간-주파수 해석

Abstract

In this study, the residual stress and the acoustic emission Charactreistics from fatigue crack propagation were investigated, bused on the welded material of STS316L. The residual stress of welding locations could be evaluated by ultrasonic parameters, such as L$_{CR}$ wave velocity and L$_{CR}$ wave frequency