Abstract
The terminal characteristics of Inconel 600 alloy (76% Ni, 16% Cr, 7% Fe) were examined and compared following cold reduction by 5, 10, 20, 30, and 40%, explosive expansion of thin-walled cylinders by 1, 10, 25, and 62%, and explosive shock loading to pressures of 80, 180, 240, and 460 kbar. The hardening behavior and structural characteristics of explosivily formed (expanded) tubes were not significantly different from those resulting for cold reduction. Deformation twins were observed by transmission electron microscopy only in samples shock loaded at 240 kbar and above. The absence of twins in the explosively formed Inconel was attributed to the failure of an adequate number of long jogs on secondary glide systems to activate dislocation pole-twin sources. Dislocations were shown to adequately account for the residual hardening occurring for the three modes of deformation.
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