Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al-0.4Zr Alloy.

The influence of decreased temperature of tensile testing on annealing-induced hardening (AIH) and deformation-induced softening (DIS) effects has been studied in an ultrafine-grained (UFG) Al-Zr alloy produced by high-pressure torsion. We show that the UFG Al-Zr alloy demonstrates a DIS effect accompanied by a substantial increase in the elongation to failure (up to ≈ 30%) depending on the value of additional straining. Both the AIH and DIS effects weaken with a decrease in the tensile test temperature.