Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Analysis of Hot Forming Process with Flow Softening by Dynamic Recrystallization

동적 재결정에 의한 연화를 고려한 열간성험공정 해석

  • 방원규 (포항공과대학교 항공재료연구센터) ;
  • 이종수 (포항공과대학교 항공재료연구센터) ;
  • 장영원 (포항공과대학교 항공재료연구센터)
  • Published : 2001.04.01
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Abstract

The change of flow stress due to dynamic recrystallization during hot forming process is investigated. A series of mechanical tests has been conducted at various temperatures, and constitutive relations and recrystallization kinetics were formulated from the test results. The effect of dynamic recrystallization to the flow stress was implemented to a commercial FEM code by conditioned remapping of state variables. The datum strain of stress compensation was optimized to minimize the overestimation of forming loads. Suggested datum was formulated as an exclusive function of critical strain for recrystallizalion and validated by mechanical tests and microstructural observations.

Keywords

References

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