Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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The Effect of Ageing on the Transformation Behavior of $Ti-50.1at\%$ Ni Alloy(I)

$Ti-50.1at\%$ Ni합금의 변태거동에 미치는 시효처리의 영향(I)

  • Woo Heung-Sik (Department of Safety Engineering, Dongguk University) ;
  • Park Sung-Bum (Department of Safety Engineering, Dongguk University) ;
  • Kang Bong-Su (Department of Safety Engineering, Dongguk University) ;
  • Kim Sung-Jin (Department of Materials Science and Engineering, Kumoh National University)
  • 우흥식 (동국대학교 안전공학과) ;
  • 박성범 (동국대학교 안전공학과) ;
  • 강봉수 (동국대학교 안전공학과) ;
  • 김성진 (금오공과대학교 신소재시스템공학부)
  • Published : 2004.12.01
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Abstract

This study investigated the effects of aging on the transformation behavior of $Ti-50.1at\%$ Ni alloy by means of differential scanning calorimetry. It was found that aging in the temperature range of $350^{\circ}C\~550^{\circ}C$ induced complex transformation behavior, involving the R-phase and multiple-stage martensitic transformation. Usually aged Ni-rich NiTi alloys undergo martensitic transformation on cooling from high temperatures in two step : B2 to R and then R to Bl9'(normal behavior). But under certain ageing conditions, the transformation can also occur in three or more step(unusual multiple step behavior). In the present study we use differential seaming calorimetry(DSC) for a systematic investigation of the evolution of transformation behavior with ageing temperature and time.

Keywords

References

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