MARTENSITE AND REVERSE TRANSFORMATION IN PRESTRAINED TiNi SHAPE MEMORY ALLOY THIN FILM |
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Authors: | XPLiu MZCao RYang |
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Affiliation: | InstituteofMetalResearch,TheChineseAcademyofSciences,Shenyang110016,China |
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Abstract: | The effect of pre-strain on phase transformation of TiNi shape memory alloy film was studied by differential scanning calorimeter measurement (DSC). Compared with un-defarmed TiNi film, the reverse transformation of pre-strained specimens was elevated to a higher temperature on the first heating, but martensite and reverse transformation on subsequent thermal cycles occurred at a lower temperature. The evolution of transformation behavior in pre-strained TiNi film was related to the change of elastic strain energy, irreversible energy and internal stress field. |
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Keywords: | shape memory alloy TiNi film pre-strain phase transformation |
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