Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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A Study of Dynamic Deformation Behaviors of SCM415 steel with the Change of Ferritic Grain Size

SCM415강의 동적 변형거동에 미치는 페라이트 결정립크기 변화에 관한 연구

  • Kim, Heon-Joo (Dept. of Metallurgical System Engineering, Pukyong National University) ;
  • Park, Moo-Yong (Dept. of Metallurgical Engineering, Graduate School of Industry, Pukyong National University)
  • 김헌주 (부경대학교 신소재공학부 금속시스템공학과) ;
  • 박무용 (부경대학교 대학원 금속공학과)
  • Received : 2007.01.02
  • Accepted : 2007.01.27
  • Published : 2007.01.30
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Abstract

Effects of ferrite grain size on static and dynamic deformation behaviors of SCM415 stels were investigated in this study. Dynamic torsional test was conducted using torsional Kolsky bar with the strain rate of $1.6{\times}10^3/s$. Specimens with three different grain size of ferrite, $4.6{\mu}m$, $11{\mu}m$, $35.5{\mu}m$ were used. Dimple fracture mode of the dynamic test specimens showed adiabatic shear bands on the beneath of fracture surface. Increased uniform elongation and decreased non-uniform elongation appeared as grain size of ferrite decreased in dynamic torsional test. However, shear strength was independent on grain size of ferrite.

Keywords

References

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