Journal
MATERIALS LETTERS
Volume 57, Issue 5-6, Pages 1079-1085Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-577X(02)00934-5
Keywords
transformation temperature; shape memory alloys; Cu-Al-Ni; entropy; enthalpy
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The martensitic transformation behaviour, morphology and transition temperatures in copper-based shape memory alloys are strongly influenced by heat treatments. The effects of various quenching, up-quenching and step-quenching in a water bath 100 degreesC and in an oil bath at 200 degreesC have been studied on two shape memory Cu-Al-Ni alloys. The changes at entropy and enthalpy at the martensitic transition have been determined by means of differential scanning calorimeter (DSC) measurements. It was observed that quenching has a marked influence on the transformation temperatures. (C) 2002 Elsevier Science B.V. All rights reserved.
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