Abstract
Effect of chemical etching and mechanical polish on the transformation temperature and growth of R-Phase in super elastic NiTi shape memory alloy have been studied in this paper. It has been observed that the transformation temperature of sample subjected to mechanical polish (HT660MP) is lower than that of samples subjected to chemical etching (HT660CE). With initial thermal cycle the phase transformation temperature get lowered for both the samples and for higher number of thermal cycle the single step transformation A→M changes to A→R→M. Because of the mechanical work the intermediate R-Phase appears at higher number of thermal cycle (N) for HT660MP compared to that of HT660CE.
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