Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Assessment of Recrystallization Behavior in Ingot-Breakdown Process of Alloy 718

Alloy 718의 잉고트 파쇄공정시 재결정거동에 대한 해석

  • 염종택 (한국기계연구원 부설 재료연구소) ;
  • 이종수 (포항공과대학교 신소재공학과) ;
  • 김정한 (한국기계연구원 부설 재료연구소) ;
  • 김남용 (한국기계연구원 부설 재료연구소) ;
  • 박노광 (한국기계연구원 부설 재료연구소)
  • Published : 2007.10.11
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Abstract

Recrystallization behavior during ingot-breakdown process of Alloy 718 was investigated with finite element analysis and experimental approaches. In order to analyze microstructural changes during the cogging process of an Alloy 718 ingot, the side-pressing and heat treatment tests were performed at different temperatures and ram speed. From the side-pressing and heat treatment test results, it was found that microstructural changes during hot forging of Alloy 718 ingot greatly influenced on a close interaction between dynamic and static-recrystallization behaviors. A recrystallization model of Alloy 718 was used to predict the complex microstructural variation during continuous heating and forging processes of the cogging, and the predicted grain size and its distribution were compared with the actual cogged Alloy 718 billet.

Keywords