Improvement of mechanical properties of magnesium alloy ZK60 by integrated extrusion and equal channel angular pressing

Fatigue Performance of Mg-Zn-Zr Alloy Processed by Hot Severe Plastic Deformation

“…On the other hand, Vinogradov et al [13] have demonstrated that integrated SPD processing involving direct extrusion combined with two ECAP passes resulting in the total equivalent strain of 5.4 is effective for improving the HCF performance of the ZK60 alloy: the HCF endurance limit in axisymmetric push-pull fatigue testing reached 160 MPa, which is very high value for this class of alloys. A variety of sophisticated SPD techniques have been developed [12,[14][15][16][17] with the aim of improving the mechanical properties including fatigue [18][19][20][21]. Among them, multiaxial isothermal forging (MIF) has long been recognized as a cost-effective and industrially scalable SPD technique.…”

On the use of cryomilling and spark plasma sintering to achieve high strength in a magnesium alloy

“…To produce magnesium alloys with ultrafine-grained or even nanocrystalline microstructure, severe plastic deformation (e.g. equal channel angular pressing, high-pressure torsion, multidirectional forging and mechanical milling) has been applied to magnesium alloys [5][6][7][8][9][10][11][12][13][14][15]. For example, a Mg-1.78Zn-0.89Mn alloy with average grain size of 700 nm was produced via two-step equal channel angular pressing process [16].…”

Corrosion Fatigue of Fine Grain Mg-Zn-Zr and Mg-Y-Zn Alloys

“…In application to magnesium alloys, Aung et al [17] have demonstrated quite convincingly that the corrosion rate reduced significantly with decreasing grain size. Vinogradov et al [18] have shown that grain refinement through integrated SPD processing involving direct extrusion combined with two equal channel angular pressing passes is effective for improving the high cycle fatigue performance of the ZK60 alloy in parallel with enhanced tensile properties and galvanic corrosion resistance [19,20]. The potential of SPD techniques to synthesize novel materials with enhanced properties profile is particularly high for Mg alloys whose performance-both fatigue and corrosion-suffers from substantial inhomogeneity of the as-cast structure, which is difficult to get rid of in the course of conventional thermo-mechanical treatments.…”