Latest research advances on magnesium and magnesium alloys worldwide

Recent developments in high-strength Mg-RE-based alloys: Focusing on Mg-Gd and Mg-Y systems

Research advances in magnesium and magnesium alloys worldwide in 2020

Unveiling the formation of basal texture variations based on twinning and dynamic recrystallization in AZ31 magnesium alloy during extrusion

Magnesium (Mg) alloys have received a significant interest in the past 20 years, owing to a nonlinearly increasing demand for lightweight structural materials. Magnesium extrusions alloys to date h...

Magnesium extrusion alloys: a review of developments and prospects

The effects of cerium (Ce) addition on the microstructure and mechanical properties of ZK60 alloy were investigated using SEM, EBSD, and TEM and by performing tensile tests of indirect-extruded ZK60 alloys with 0.5, 1.0, and 1.5 wt% Ce contents. The variation of hot workability due to Ce addition was also investigated by establishing processing maps of these alloys. The results revealed that Ce addition had an obvious influence, reducing the average grain size and weakening the basal fiber texture of the as-extruded ZK60 alloys; these changes were attributed to the promotion of dynamic recrystallization (DRX) by particle stimulated nucleation (PSN) at Mg–Zn–Ce particles. The yield and tensile strengths were improved by the Ce addition, while the elongation was decreased due to the hard Mg–Zn–Ce particles. It was also found that the hot workability improves up to the addition of 1.0 wt% Ce and then deteriorates.

Effects of cerium addition on the microstructure, mechanical properties and hot workability of ZK60 alloy

Improved mechanical properties of Mg–7.6Al–0.4Zn alloy through aging prior to extrusion

An extraordinary high strength Mg–8Al–05Zn alloy has been developed through extrusion at a low temperature of 200 °C and a slow speed of 007 mm/s The as-extruded alloy exhibited a tensile yield strength of 403 MPa, an ultimate tensile strength of 437 MPa, an elongation of 107%, and a low tension-compression yield asymmetry of 097 These superior mechanical properties are attributed to the combined effect of ultra-fine recrystallized grains, numerous nano-scale Mg 17 Al 12 precipitates, and strong basal texture

Development of extraordinary high-strength Mg–8Al–0.5Zn alloy via a low temperature and slow speed extrusion

The effects of extrusion speed on the microstructure and tensile properties of the ZK60 and ZK60-1Ce alloys were investigated by performing indirect extrusion at three ram speeds (0.3, 1.0 and 3.0 mm/s). All of the extruded alloys showed a bimodal microstructure consisting of equiaxed fine recrystallized (DRXed) grains and elongated coarse unDRXed grains. With increasing extrusion speed, the exit temperature increased due to deformation heating, resulting in a larger grain and a higher DRXed fraction. The yield and ultimate tensile strengths and elongation at RT decreased with an increase of extrusion speed. The ZK60-1Ce alloys exhibited a finer grain size, a higher DRXed fraction, and weaker texture intensity than the ZK60 alloys at the same extrusion speed due to the inhibition of grain growth by the pinning effect and the promotion of DRX by particle-stimulated nucleation. The yield and ultimate tensile strengths at room and elevated temperatures were increased by the addition of Ce, while elongation was decreased due to cracking at the Mg–Zn–Ce particles.

Hui Yu

Papers

Effects of cerium addition on the microstructure, mechanical properties and hot workability of ZK60 alloy

Improved mechanical properties of Mg–7.6Al–0.4Zn alloy through aging prior to extrusion

Development of extraordinary high-strength Mg–8Al–0.5Zn alloy via a low temperature and slow speed extrusion

Effects of extrusion speed on the microstructure and mechanical properties of ZK60 alloys with and without 1 wt% cerium addition

Strengthening mechanisms of indirect-extruded Mg–Sn based alloys at room temperature