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Experiment and modeling to investigate the effect of stress state, strain and temperature on martensitic phase transformation in TRIP-assisted steel SCIE SCOPUS

Title
Experiment and modeling to investigate the effect of stress state, strain and temperature on martensitic phase transformation in TRIP-assisted steel
Authors
Kim, HLee, JBarlat, FKim, DLee, MG
Date Issued
2015-09-15
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
The effects of the stress state and temperature on the martensitic phase transformation behavior in a TRIP-assisted steel (TRIP780) were investigated using multi-axial experimental techniques. For this purpose, five different stress states were considered; i.e., uniaxial tension, uniaxial compression, equi-biaxial tension, plane strain tension and simple shear. A range of temperatures from room to 100 degrees C for each stress state condition except the simple shear test were investigated. In particular, for the equi-biaxial tension data in warm conditions, a specially designed hydraulic bulge experiment was adopted. In situ magnetic measurements were performed to monitor the evolution of the martensitic content throughout each experiment. A stress state and temperature dependent transformation kinetics law was proposed, which incorporates a non-linear function of the stress triaxiality, Lode angle parameter and temperature. This new model captures the measured martensitic phase transformation kinetics of TRIP780 steel over a wide range of stress states and temperature reasonably well. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
URI
https://oasis.postech.ac.kr/handle/2014.oak/36345
DOI
10.1016/J.ACTAMAT.2015.06.023
ISSN
1359-6454
Article Type
Article
Citation
ACTA MATERIALIA, vol. 97, page. 435 - 444, 2015-09-15
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BARLAT FREDERIC GERARDBARLAT, FREDERIC GERARD
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