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.

A simple model to calculate the microstructure evolution in a NiTi SMA / Di Cocco, Vittorio; Natali, Stefano. - In: FRATTURA E INTEGRITÀ STRUTTURALE. - ISSN 1971-8993. - 12:44(2018), pp. 173-182. [10.3221/IGF-ESIS.44.14]

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

Natali, Stefano
2018

Abstract

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.
2018
austenite; martensite; microstructure transitions; shape memory alloy; mechanics of materials; mechanical engineering
01 Pubblicazione su rivista::01a Articolo in rivista
A simple model to calculate the microstructure evolution in a NiTi SMA / Di Cocco, Vittorio; Natali, Stefano. - In: FRATTURA E INTEGRITÀ STRUTTURALE. - ISSN 1971-8993. - 12:44(2018), pp. 173-182. [10.3221/IGF-ESIS.44.14]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1256738
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