The Prediction of Dynamic Recrystallization and Grain Size of 304 Stainless Steel during Hot Deformation

304 스테인리스강의 열간동적재결정과 미세조직 예측

  • 권영표 (한국해양대학교 대학원 기계공학과) ;
  • 조종래 (한국해양대학교 기계정보공학부) ;
  • 이성열 (한국해양대학교 기계소재공학부) ;
  • 이정환 (한국기계연구원 재료공정부)
  • Published : 2001.12.01

Abstract

The flow stress of 304 stainless steel during hot forming process were determined by conducting hot compression tests at the range of 1273 K∼1423 K and 0.05 /s∼2.0 /s as these are typical temperature and strain rate in hot forging operation. In this material, Dynamic recrystallization was found to be the major softening mechanism with this conditions as Previous studies. Based on the observed phenomena, a constitutive model of flow stress was assumed as a function of strain, strain rate, temperature. In the constitutive model, the effects of strain hardening and dynamic recrystallization were taken into consideration. A finite element method connected to constitutive model was performed to predict the dynamic recrystallization behaviors and also stress-strain curves in hot compression of 304 stainless steel.

Keywords

References

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