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Ultrasonic Evaluation of Creep Damage in 316LN Stainless Steel  

Yin, Song-Nan (Graduate school. Department of Mechanical Engineering, Soongsil University)
Hwang, Yeong-Tak (Graduate school. Department of Mechanical Engineering, Soongsil University)
Yi, Won (Department of Mechanical Engineering, Soongsil University)
Publication Information
International Journal of Precision Engineering and Manufacturing / v.8, no.4, 2007 , pp. 33-37 More about this Journal
Abstract
Creep failure of 316LN stainless steel (SS) occurs due to the nucleation and growth of cracks. An investigation was performed to correlate the creep damage with ultrasonic wave speeds and angular frequencies using creep-tested 316LN SS specimens. Ultrasonic wave measurements were made in the direction of and perpendicular to the loading using contact probes with central frequencies of 10, 15, and 20 MHz. We found that the angular frequency and wave speed decreased with increasing creep time to rupture by analyzing the ultrasonic signals from the 15 and 20 MHz probes. Therefore, the creep damage was sensitive to the angular frequency and wave speed of ultrasonic waves.
Keywords
Creep damage; Ultrasonic wave; Creep time to rupture; Wave speed; Angular frequency; Grain boundary;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 2  (Related Records In Web of Science)
연도 인용수 순위
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