TY - JOUR
T1 - Phase transformations across high strength dissimilar steel inertia friction weld
AU - Moat, Richard
AU - Karadge, Mallikarjun
AU - Preuss, Michael
AU - Bray, Simon
AU - Rawson, Martin
PY - 2008/8/11
Y1 - 2008/8/11
N2 - 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.
AB - 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.
KW - Austenite
KW - Inertia friction welding
KW - Phase transformations
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=44649149543&partnerID=8YFLogxK
U2 - 10.1016/j.jmatprotec.2007.10.074
DO - 10.1016/j.jmatprotec.2007.10.074
M3 - Article
AN - SCOPUS:44649149543
VL - 204
SP - 48
EP - 58
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
SN - 0924-0136
IS - 1-3
ER -