Orientation Dependent Work Hardening Behavior of Cold Rolled and Solution Annealed Hastelloy C-276 Alloy

The Hastelloy C-276 alloy in cold rolled and solution annealed condition displays two slopes in true plastic stress - strain curve and follows a Ludwigson relation. The lower values of Ludwigson flow curve parameters such n(1), n(2) (less negative) and eL indicate less uniform elongations for tensile samples along 45 degrees / 67.5 degrees directions in comparison to those of L, 22.5 degrees and T directions. The relatively low ductility and low work hardening exponent of 45 degrees and 67.5 degrees orientation samples have been explained based on dislocation storage capacity and dynamic recovery coefficient using Kock-Mecking-Estrin analysis. (C) 2017 Elsevier Ltd. All rights reserved.