Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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High Temperature Deformation Behavior of Ti-Al Intermetallic Compound and Orientation Distribution of Lamellae Structure

Ti-Al금속간화합물의고온변형거동및라멜라조직의결정방위분포

  • 박규섭 (요코하마국립대학 공학부 생산공학과) ;
  • 강창용 (국립부경대학 재료공학부) ;
  • 이근진 (양산대학 전자통신과) ;
  • 정한식 (국립경상대학 수송기계공학부) ;
  • 정영관 (국립금오공과대학교 기계공학부) ;
  • 복부양지 (요코하마국립대학 공학부 생산공학과)
  • Published : 2004.10.01
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Abstract

High temperature uniaxial compression tests in the alpha single phase region were carried out on the Ti -43mo1%Al intermetallic compound, in order to obtain oriented lamellar microstructure. The compression deformation temperatures and strain rates are from 1573k to 1623k and 1.0x10$^{-4}$ s to 5.0x10$^{-3}$ s, respectively. Fully lamellar microstructure was observed after the uniaxial compression deformation in a single phase region followed by cooling to room temperature. Lamellar colony diameter depended on strain rates and test temperatures. The diameter varied between 8601m and 300fm. Stress-strain curve showed a work softening and the size of lamellar colony diameter varied depending on peak stresses. This shows the occurrence of dynamic recrystallization. Texture measurements after the uniaxial compression deformation, showed the development of fiber during dynamic recrystallization. It is seen that the area for the maximum pole density existed in 35 degrees away from the compression plane. The texture sharpens with a decrease in strain rate

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References

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