Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 527, Issue 4-5, Pages 934-940Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2009.09.007
Keywords
Nb-microalloyed steel; Hot working; Austenite-ferrite transformation; Strain reversal
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Funding
- Research Fund for Coal and Steel of the European Community [RFSR-CT-2007-00014]
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Multipass torsion tests were performed on an Nb-microalloyed steel at decreasing temperatures so as to analyze the effect of strain reversal - in the strain accumulation region - on the gamma -> alpha transformation kinetics. Strain reversal involved a significant delay in the start of the transformation as well as a microstructural transient compared to monotonic strain conditions. However, after several passes with no reversal performed within the inter-critical temperature region, both types of tests led to similar microstructures. (C) 2009 Elsevier B.V. All rights reserved.
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