材料期刊网

Enhanced strength-ductility synergy in nanostructured Cu and Cu-Al alloys processed by high-pressure torsion and subsequent annealing

Scripta Materialia

Nanostructured Cu and Cu-Al alloys processed by high-pressure torsion were isochronally annealed to investigate the effects of the stacking fault energy (SFE) on strength and ductility. All metals exhibit a similar general trend that the strength decreases and the ductility improves with increasing annealing temperatures, and a notable enhancement of ductility was achieved only when the volume fraction of recrystallized grains exceeded similar to 80%. The strength-ductility synergy improves significantly with decreasing SFE. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

关键词: Cu and Cu-Al alloy;High-pressure torsion (HPT);Nanostructure;Strength-ductility synergy;Stacking fault energy (SFE);stacking-fault energy;mechanical-properties;microstructural evolution;zn alloy;deformation;copper;boundaries;strain;metal;grain