Effect of ECAP on Mechanical Properties of an AA2014 Alloy
An AA2014 alloy was subjected to equal channel angular pressing in quenched condition up to fixed true strains of 1, 2 at a temperature of 170oC followed by artificial aging at the similar temperature. ECAP provides accumulation of a high dislocation density after a true strain of 1 and the formation of subgrain structure and separate chains of nanoscale grains after a true strain of 2. Yield stress (460 MPa) of the AA2014 alloy after 1 and 2 passes was the same. In contrast, increasing strain from 1 to 2 leads to three-fold increase in ductility.
Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon
R. Kaibyshev and A. Mogucheva, "Effect of ECAP on Mechanical Properties of an AA2014 Alloy", Materials Science Forum, Vols. 667-669, pp. 931-936, 2011