Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on the Shape Memory Characteristic Behaviors of Ti-42.5at.%Ni-2.0at.%Cu Alloys in Tension and Compression Condition

Ti-42.5at.%Ni-2.0at.%Cu합금의 인장 및 압축에 따른 형상기억특성에 관한 연구

  • Woo, Heung-Sik (Department of Safety Environmental System Engineering, Dongguk University) ;
  • Cho, Jae-Whan (Department of Safety Environmental System Engineering, Graduate School of Dongguk University) ;
  • Park, Yong-Gyu (Department of Safety Environmental System Engineering, Graduate School of Dongguk University)
  • 우흥식 (동국대학교 안전환경시스템공학과) ;
  • 조재환 (동국대학교 대학원 안전환경시스템공학과) ;
  • 박용규 (동국대학교 대학원 안전환경시스템공학과)
  • Published : 2009.10.31
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Abstract

NiTiCu alloys can produce a large force per unit volume and operate with a simple mechanism. For this reasons, it has been widely studied for application as a micro actuator. So in this study, one-way and two way shape memory effects of Ti-42.5at%Ni-2.0at%Cu alloys are studied. In the case of one-way shape memory effects, shape memory recoverable stress and strain of this alloys were measured by means of tension and compression tests under constant temperature. The strains by tension and compression stress were perfectly recovered by heating at any testing conditions also shape memory recoverable stress increased to 116 MPa in tension tests and to 260 MPa in compression tests. In the case of two-way shape memory effects, transformation temperatures from thermal cycling under constant uniaxial applied tension and compression loads linearly increased by increasing external loads and their maximum recoverable strain is 3.8% at 100MPa tensile condition and 2.2% at 125 MPa compression condition.

Keywords

References

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