Publications Details

Microstructures of inertia friction welds in Fe-Ni-Cr ternary alloys

Puskar, J.D.; Brooks, J.A.; Yang, N.

Studies were conducted to determine what relationships may exist between alloy compositions and inertia friction weld microstructures of austenitic stainless steels. Ternary alloys of iron, nickel and chromium with 60-70% Fe and a range in Cr/Ni ratios from 0.34 to 1.9 were investigated. It was found that although grain size and compositional banding were reduced and varied with radial position and weld parameters, no significant solid-state transformation between ferrite and austenite was detected. Ferrite stringers in base materials with high ferrite content were elongated and fragmented, while in base materials with small amounts of ferrite stringers the ferrite dissolved. These findings may vary for different sample geometries and weld schedules. Copyright © 2006 ASM International®.