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Phase transformations across high strength dissimilar steel inertia friction weld

Moat, Richard; Karadge, Mallikarjun; Preuss, Michael; Bray, Simon and Rawson, Martin (2008). Phase transformations across high strength dissimilar steel inertia friction weld. Journal of Materials Processing Technology, 204(1-3) pp. 48–58.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.jmatprotec.2007.10.074
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Abstract

Microstructural variation across inertia friction welded Aermet 100 (ultra-high strength secondary hardening steel) and SCMV (high strength low alloy Cr–Mo steel) has been studied. Retained austenite was mapped in two dimensions across the inertia friction welds using synchrotron-X ray diffraction. Microhardness testing and SEM were used to characterize the general microstructure variation across the weld line in the as-welded and post-weld-heat-treated (PWHT) conditions. Four distinct microstructural zones were observed for the as-welded condition in the heat-affected zone. Subsequent PWHT resulted in a reduction of the peak hardness on adjacent sides of the weld with all other areas increasing in hardness. These changes in hardness are explained based on tempering of the martensitic structure and precipitation reactions during PWHT.

Item Type: Journal Article
Copyright Holders: 2008 Elsevier B.V.
ISSN: 0924-0136
Keywords: phase transformations; X-ray diffraction; inertia friction welding; austenite
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Item ID: 29557
Depositing User: Richard Moat
Date Deposited: 22 Sep 2011 15:20
Last Modified: 22 Sep 2011 15:20
URI: http://oro.open.ac.uk/id/eprint/29557
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