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논문 : 기계적 성질 ; 이상스테인리스강의 합금성분 변화에 따른 피로균열전파거동 = Research Paper : Mechanical Behavior ; The effect of alloy composition on the fatigue crack propagation of duplex stainless steels

제어번호 : 75326187

저자명 : 강태형 ( Tae Hyung Kang ) ,이용득 ( Yong Deuk Lee ) ,이종수 ( Chong Soo Lee )

학술지명 : 대한금속·재료학회지(Korean Journal of Metals and Materials)

권호사항 : Vol.36 No.7 [1998]

발행처 : 대한금속재료학회 ( 구 대한금속학회 )

발행처 URL : http://www.kim.or.kr

자료유형 : 학술저널

수록면 : 1038-1045(8쪽)

언어 : -

발행년도 : 1998년

KDC : 436

주제어 : Fatigue crack growth ,Duplex stainless steel ,phase ,Crack closure

소장기관 :

  • 영남대학교 과학도서관

제공처 : 한국학술정보 한국학술정보

  • 초록
    • A study has been made to investigate the effect of the substitution of tungsten(W) for molybdenum(Mo) on the microstructure and the fatigue crack growth (FCG) behavior of duplex stainless steels. For the homogenized specimens, microstructures and the FCG properties were not largely changed with the Increase in W content. However, when the alloys were aged at 900℃ for 30 minutes after homogenization, the apparent FCG resistance was significantly increased as compared to that of homogenized specimens. It was mainly attributed to the precipitation of the e and x phases in the aged microstructures, which induced higher levels of crack closure than the homogenized microstructures during the crack propagation. With an increase in W content, the quantity and size of the brittle precipitates decreases and the ductility of the aged alloys Increases. Accordingly, the intrinsic FCG resistance of the aged alloys is Improved with increasing W contents.