On the prediction of martensite formation in metals
Accepted version
Peer-reviewed
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Authors
Galindo-Nava, EI
Abstract
A new approach to predict athermal martensite formation in metals is presented. It is based on computing the driving force of the transformation including a strain energy term induced by atomic shear displacements and energy terms due to substitutional and interstitial lattice distortions. The model is applied to prescribe the martensite and austenite start temperatures in Fe-, Ti- and Co-based alloys with no adjustable parameters. Expressions for Ms variations with composition are derived for multicomponent systems. The transformation temperature hysteresis is predicted in Co alloys showing that this approximation can be used to design alloys with the shape memory effect.
Description
Keywords
Martensitic phase transformation, Martensitic steels, shape memory alloys, titanium alloys, CALPHAD
Journal Title
Scripta Materialia
Conference Name
Journal ISSN
1359-6462
Volume Title
138
Publisher
Elsevier
Publisher DOI
Sponsorship
Royal Academy of Engineering (RAEng) (RF1516\15\20)
The author would like to acknowledge the Royal Academy of Engineering for his research fellowship funding and to Prof. Mark Blamire for the provision of laboratory facilities.