한국해양공학회:학술대회논문집 (Proceedings of the Korea Committee for Ocean Resources and Engineering Conference)

한국해양공학회 (Korean Society of Ocean Engineers)
권호 표지

시효된 수퍼 2상 스테인리스강의 피로균열 진전시 발생하는 음향방출신호의 시간-주파수 분석

Time-Frequency Analysis of AE Signals at Fatigue Crack Propagation of Aged Super Duplex Stainless Steels

  • 남기우 (부경대학교 재료공학부) ;
  • 이상기 (부경대학교 대학원 재료공학과) ;
  • 도재윤 (부산기능대학) ;
  • 강창룡 (부경대학교 재료공학부)
  • 발행 : 2000.10.01
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초록

lh deleterious Cr, Mo rich -$\sigma$phase is a hard embrittling precipitate, which forms between MU)-900 $^{\circ}C$, often associated with a reduction in both impact properties and corrosion reshame. On this study, After aging at MU) "C, fatigue crack propagation induced by a phase precipitation was evaluated and time-frequency analysis of acoustic emission was conducted It was possible to find fracture mechanism by a phase precipitation due to time-frequency anulysis of acoustic emission signals.nals.

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