Abstract
Friction stirs lap-welded advanced high-strength M190 steel exhibited formation of lath martensite at weld nuggets, a ferrite layer at faying surfaces and a ferrite-pearlite microstructure at the bottom of the stir zone. the phase transformation was governed by severe plastic deformation in the austenitic region followed by cooling. the strain rate and peak temperature played key roles in controlling the prior-austenitic grain size and were correlated to the Zener-Hollomon parameter. an empirical relationship has been obtained for dynamically recrystallized austenite grains. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Recommended Citation
M. Ghosh et al., "Analysis of Microstructural Evolution during Friction Stir Welding of Ultrahigh-strength Steel," Scripta Materialia, vol. 63, no. 8, pp. 851 - 854, Elsevier; Acta Materialia, Oct 2010.
The definitive version is available at https://doi.org/10.1016/j.scriptamat.2010.06.032
Department(s)
Materials Science and Engineering
Keywords and Phrases
Dynamic recrystallization; Friction stir welding; Martensitic steel; Zener-Hollomon parameter
International Standard Serial Number (ISSN)
1359-6462
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier; Acta Materialia, All rights reserved.
Publication Date
01 Oct 2010
Comments
Missouri University of Science and Technology, Grant None