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

Yoon Sung Ho (금오공과대학교 기계공학부)
Yeo Dong Jin (금오공과대학교 기계공학부 대학원)
Publication Information
Composites Research / v.18, no.2, 2005 , pp. 38-45 More about this Journal
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.
Keywords
상변환;결정구조;니티놀 형상기억합금;어닐링 열처리 조건;시차주사열량분석장치;X-선 회절장치;
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