Journal
ACTA MATERIALIA
Volume 60, Issue 3, Pages 1139-1148Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2011.11.018
Keywords
Lath martensite; Steels; EBSD; Reconstruction; Variant selection
Funding
- Ministry of Education, Culture, Sports, Science and Technology [23686098, 21760526]
- Iron and Steel Institute of Japan
- Japan Society for the Promotion of Science
- Global COE of Materials Integration International Center of Education Research at Tohoku University
- Grants-in-Aid for Scientific Research [23686098, 21760526] Funding Source: KAKEN
Ask authors/readers for more resources
Variant selection in lath martensite transformed from deformed austenite in a low-carbon low-alloy steel is examined quantitatively on the basis of electron backscatter diffraction analysis of martensite, in concert with a novel method for the reconstruction of austenite orientation. At a strain of 10%, variants whose (011)(alpha) plane was nearly parallel to the primary slip plane in austenite ((111)(gamma)) were formed dominantly. At strains of 30% and 50%, variants whose (011)(alpha) plane was nearly parallel to the secondary slip plane ((-111)(gamma)) as well as the primary slip plane were formed. Transmission electron microscopy observation of an austenite-stabilized alloy deformed under the same condition as the low-carbon low-alloy steel clarified that microband structures develop along the primary and secondary slip planes of austenite when its orientation is close to the main component of the deformation texture in austenite. A simple variant selection model is proposed in which martensite variants with habit planes nearly parallel to the primary and secondary slip planes nucleate preferentially on microband boundaries as a result of a smaller amount of activation energy and grow dominantly as a result of less inhibition from the microband boundaries. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available