A simple model to calculate the microstructure evolution in a NiTi SMA

Frattura ed Integrità Strutturale

关键词: Shape memory alloy;    Austenite;    Martensite;    Microstructure transitions;   

DOI  :  10.3221/IGF-ESIS.44.14

来源: DOAJ

【 摘 要 】

Shape memory alloys (SMAs) are a wide class of materials characterized by the property to recover the initial shape. This property is due to ability of alloys to change the microstructure from a �parent� microstructure (usually called �Austenite�) to a �product� microstructure (usually called �Martensite�). Considering the tensile resistance, SMAs stress strain curves are characterized by a sort of plateau were the transformations from Austenite to Martensite (in loading condition) and from Martensite to Austenite (in unloading condition) take place. In this work a simple model to predict the microstructure modification has been proposed and verified with an equiatomic NiTi alloy characterized by a pseudo-elastic behavior

【 授权许可】

Unknown