International Journal of Precision Engineering and Manufacturing

  • 제8권4호
  • /
  • Pages.33-37
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  • 2007
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  • 2234-7593(pISSN)
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  • 2005-4602(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

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)
  • 발행 : 2007.10.01
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초록

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.

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참고문헌

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