Effects of Annealing Heat Treatment Conditions on Phase Transformation of Nitinol Shape Memory Alloy

어닐링 열처리 조건에 따른 NITINOL형상기억합금의 상변환 특성 연구

  • 윤성호 (금오공과대학교 기계공학부) ;
  • 여동진 (금오공과대학교 기계공학부 대학원)
  • Published : 2005.04.01

Abstract

Phase transformation behaviors and crystal structures of Nitinol shape memory alloy $(54.5Ni-45.5Tiwt\%)$ are investigated by varying annealing heat treatment conditions through DSC (Differential Scanning Calorimetry) and XRD (X-Ray Diffraction). Annealing heat treatment conditions were considered as heat treated times of 5min, 15min. 30m1n, and 45min, as well as heat treated temperatures of $400^{\circ}C,\;500^{\circ}C,\;525^{\circ}C,\;550^{\circ}C,\;575^{\circ}C,\;600^{\circ}C,\;700^{\circ}C,\;800^{\circ}C,\;and\;900^{\circ}C$ According to the results, annealing heat treatment conditions such as heat treated times and heat treated temperatures were found to affect significantly on phase transformation behaviors and crystal structures of Nitinol shape memory alloy.

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