Solute-induced strengthening during creep of an aged-hardened Al-Mn-Zr alloy.

ABSTRACT: We examine the precipitation and creep behavior of Al-0.5Mn-0.02Si (at.%) alloys, with and without the L1₂-forming elements Zr and Er (0.09 and 0.05 at.%, respectively), utilizing isochronal aging experiments as well as compressive and tensile creep tests performed between 275 and 400 °C. The Al-0.5Mn-0.09Zr-0.05Er-0.05Si alloy exhibits an unusually high creep resistance in the peak-aged state, which is significantly better than that observed generally in its Mn-free L1₂-strengthened counterparts; for example, the creep threshold stresses at 300 °C are 34-37 MPa, about three times higher than those in a Mn-free Al-0.11Zr-0.005Er-0.02Si alloy. Scanning transmission electron microscopy illustrates that nanoscale Al ₃ (Zr,

SUBMITTER: Farkoosh AR 

PROVIDER: S-EPMC9565667 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature