Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Application of Dynamic Materials and Softening Models to the FEM Analysis of Hot Forging in SAF2507 Steel

동적재료모델 및 연화모델을 응용한 SAF 2507 강의 열간단조 유한요소해석

  • 방원규 (포항공과대하교 항공재료연구센터) ;
  • 정재영 (포항산업과학연구원 재료공정연구센터) ;
  • 장영원 (포항공과대하교 항공재료연구센터)
  • Published : 2003.07.01
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Abstract

High temperature deformation and softening behavior of SAF 2507 super duplex stainless steel (SDSS) has been investigated in connection with an FEM analysis of hot forging process. Flow curves at various strain rates and temperatures were determined first from compression tests, and the kinetics of dynamic recrystallization were also formulated through the analysis of load relaxation test results. Using the dynamic materials theory proposed by Prasad, the deformation behavior was effectively determined for various conditions. Constitutive relations and recrystallization kinetics formulated from the test results were then implemented in a commercial FEM code. The forming load as well as the distribution of recrystallized volume fraction after forging was successfully predicted by means of the flow stress compensation formulated upon the volume fraction of recrystallization and adiabatic heating.

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References

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