Grain scale analysis of variant selection during the gamma-epsilon-alpha' phase transformation in austenitic steels
(2011) Solid State Phenomena — Vol. 172-174, p. 84-89 (2011)
Files
No attached file found for this publication.
Details
- Authors
- Abstract
- Austenitic steels can exhibit a complex transformation sequence during deformation. Indeed, the austenitic phase transforms first into bands of ε (HCP) martensite. This transformation is then followed by the formation of α’ (BCC) martensite. In this study, the crystallography of the transformation together with the occurrence of variant selection is studied at the scale of individual austenite grains. About ten prior austenite grains deformed at different strain levels in uniaxial tension were analysed by means of EBSD techniques. One of the classical approaches to predict the variant selection phenomenon is based on the calculation of the interaction energy between the macroscopic stress and the shape deformation associated with the formation of the product phase. The formation of the α’ variants was observed to lead to a very strong variant selection that cannot be fully explained by energetic criterion. It is suggested that the crystallography of the transformation sequence can account for the unexpected variants.
- Affiliations
Université Libre de Bruxelles Service Matières et Matériaux The University of British Columbia, Vancouver, Canada Department of Materials Engineering Université Libre de Bruxelles Service Matière et Matériaux
Citations
Malet, L., Sinclair, C. W., Jacques, P., & Godet, S. (2011). Grain scale analysis of variant selection during the gamma-epsilon-alpha’ phase transformation in austenitic steels. Solid State Phenomena, 172-174, 84-89. https://doi.org/10.4028/www.scientific.net/SSP.172-174.84 (Original work published 2011)