Equal channel angular extrusion (ECAE) is applied to an age-hardening Al-Mg-Si alloy at temperatures where concurrent aging (dynamic aging) can occur to form fine 00 -Mg 2 Si precipitates, and an ultrafine-grained matrix with high dislocation density can be maintained. This microstructure results in significant strength enhancement with little sacrifice in tensile ductility. The large plastic strain imposed by ECAE causes a fraction of the precipitates to dissolve into the aluminum matrix, which re-precipitate during subsequent aging treatment.

No abstract

No abstract