Characterization of hot deformation behavior of Al0.3CoCrFeNi high-entropy alloy and development of processing map

This study presents the characteristics of hot deformation behavior a Al0.3CoCrFeNi high–entropy alloy in temperature and strain rate ranges 1023–1423 K 10–3–10 s–1, respectively. The constitutive flow was modeled based on hyperbolic–sinusoidal Arrhenius–type equations mathematical relation used to observe influence true material constants. To define workability alloy, processing map developed principles dynamic materials model. Accordingly, recrystallization (DRX) domain identified as prudent for 1273–1423 10–2–2 × 10–1 s–1 respectively, with peak efficiency ~45% at 1423 K/6 10–2 s–1. At lower temperatures (1048–1148 K) rates (10–3–3 10–3 s–1), recovery (DRV) 38% 1123 K/10–3 A large instability regime occurred above 3 an increased tendency adiabatic shear bands. It extended 10–2–10−1 s−1 temperatures< K, manifested by localized bands grain boundary cracking. low (5 10–3–10–3 s–1) (1148–1298 K), particle stimulated nucleation new DRX grains B2 precipitates, though power dissipation dropped sharply ∼9%.