Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study on the impact fracture behavior with the ferrite-martensite dual phase steels

페라이트-마르텐사이트 複合組織鋼의 衝擊破壞擧動

  • 송삼홍 (고려대학교 공대 기계공학과) ;
  • 오택렬 (경희대학교 공대 기계공학과)
  • Published : 1988.01.01
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Abstract

The mechanical properties of Ferrite-Martensite dual phase steels are affected by microstructural factors, such as, martensite volume fractions, grain size of ferrite, hardness ratio of Ferrite-Martensite, connectivity and chemical components etc. Therefore, this study has been made on the influence of Impact fracture behavior which changes the hardness ratio of Ferrite-Martensite by mean of heat treatment of low carbon Mn-Steels. In order to analyze and examine the effect of fracture behavior under impact load, this study investigated the impact strength, the impact loading time, the absorbed energy on the fracture ductility of Ferrite-Martensite dual phase steels, the formation of micro crack and slip, and plastic restraint of martensite on the plastic deformation.

본 연구에서는 화학성분, 마르텐사이트 체적율, 연결도, 모상위경 및 제2상의 형태를 되도록 일정하게 하고, 제1상과 제2상의 경도비만을 변화시켰을 때의 충격降伏荷重 및 충격최대하중의 거동, 충격속도가 하중작용시간에 미치는 영향, 흡수에너지 및 延性-胞性거동 등을 고찰하였다.

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