Microstructure and properties of magnesium alloy processed by a new severe plastic deformation method

Enhanced stretch formability and mechanical properties of a magnesium alloy processed by cold forging and subsequent annealing

“…At RDe = 1.5, a microstructure composed of high-density fine twins and ultrafine grains (UFG) was uniformly developed and the initial grain boundaries disappeared almost completely. Unlike the microstructure of Mg alloy subjected to C shape equal channel reciprocating extrusion (CECRE) [12], the minimun grain size of AZ21 subjected to cold-MDF process was obtained only after sufficient passes and the subsequent passes played an important role in homogenizing microstructure.…”

Deformation homogeneity in accumulative back extrusion processing of AZ31 magnesium alloy

“…Such a high amount of EPS has not been already reported at the end of first pass of any SPD processes. For C-shape equal channel reciprocating extrusion (CECRE) [14] and TCAP [7], as the newly developed SPD techniques, the values of 2.74 and 2.30 were estimated, respectively. The analysis of material flow pattern and the state of strain revealed the zone of more severe plastic deformation (Fig.…”

Microstructure and Mechanical Properties of Ultra-fine-Grained Al-Mg-Si Tubes Produced by Parallel Tubular Channel Angular Pressing Process

“…The saturation is may be because of the saturation of the grain size. This saturation behavior has also seen in ECAP-processed copper, [30] Ni, [35] Ti, [36] and magnesium alloy [13] and TCAP-processed pure Al. [18] Some researchers reported that the increase in the strain reduces the dislocation density in the grain interiors of a 1050-Al alloy.…”