Annealing effect on microstructure and mechanical properties of Cu-Al alloy subjected to Cryo-ECAP

Abstract

Cu-7%Al alloy subjected to equal channel angular pressing at cryogenic temperature with liquid nitrogen cooling (Cryo-ECAP)was treated by annealing. The microstructure and mechanical properties of Cu-7%Al alloy before and after annealing were investigated. It shows that a large number of annealing twins formed in Cu-7%Al alloy subjected to Cryo-ECAP. After 300∘C and 0.5 h annealing in Cu-7%Al alloy processed by Cryo-ECAP, tensile strength and uniform elongation was increased up to 644 MPa and 7.6% respectively. The enhanced mechanical properties of Cu-7%Al alloy after annealing is attributed to the high density nanoscale twins.

The effect of neutron irradiation on mechanical properties of CuCrZr alloys processed by cryorolling

“…The mechanical properties and microstructure of CuCrZr alloy can be modified by several SPD methods, such as high-pressure torsion (HPT), multi-directional forging (MDF), equal-channel angular pressing (ECAP) and asymmetric rolling (ASR), in some cases also at cryogenic temperatures [7,[10][11][12][13]. The increased ductility was observed in Cu-10%Al with UFG structure compared to the conventional coarse-grained alloy [14]. In materials with low stacking fault energy (SFE), SPD processes are realized under cryogenic conditions when the deformation by twinning is activated, which ensures the stability of the grain boundaries at elevated temperatures.…”

Nanolamellar Tantalum Interfaces in the Osteoblast Adhesion

“…The deformation at low temperature, can result in a high density of defects, which could act as potential recrystallization sites 37 to produce nanostructures. As a consequence, cryogenic deformation has been successfully employed to produce nanostructured materials and enable further decrease in the size of nanostructures.…”