Multiple-step martensitic transformations in the Ni(51)Ti(49) single crystal

作者：Khalil Allafi Jafar^*; Amin Ahmadi Behnam

来源：Journal of Materials Science, 2010, 45(23): 6440-6445.

DOI：10.1007/s10853-010-4729-4

Multiple-step martensitic transformations of an aged Ni(51)Ti(49) single crystal using calorimetric method were investigated. Results show that for short aging times (10-45 min) multiple-step martensitic transformations on cooling occur in two steps. Applying intermediate aging times (1.25-4 h) results in three steps and long aging times (more than 8 h) lead to two-step martensitic transformations again. This behavior has not been recognized in NiTi single crystals in literatures. It can be related to the heterogeneity of composition and stress fields around Ni(4)Ti(3) precipitates.

• 出版日期2010-12