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

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지

A Study on Hot Workability and Microstructural Development of 7075 Al Alloy

7075Al 합금의 고온소성 및 조직제어에 관한 연구

  • 고병철 (인하대학교 공과대학 금속공학과) ;
  • 전정식 (인하대학교 공과대학 금속공학과) ;
  • 이현민 (인하대학교 공과대학 금속공학과) ;
  • 최규창 (국방과학연구소) ;
  • 유연철 (인하대학교 공과대학 금속공학과)
  • Published : 1995.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

Hot workability and microstructural development of 7075Al alloy were studied by hot torsion test. With decling temperature from 440$^{\circ}C$ to 340$^{\circ}C$, and strain rate ranges form 5 ${\times}$10-3/sec to 5 ${\times}$10-1/sec , flow stress and microstructural development were analyzed . The hot resoration mechanism was found to be dynamic recrystalization (DRX) form the analysis of the flow curves and the microstructures. In multistage deformation with decreasing temperature grain refinement was obtained effectively compared to conventional thermomechanical treatment (TMT) process. The strain of the 1st stage deformation at 440$^{\circ}C$ was found to play an important role for the next stage deformation behavior at 380$^{\circ}C$.

Keywords