Mechanical Properties of Mg–Al–Ca Alloy Recycled by Solid–State Recycling

Abstract

Solid-state recycling for runner scraps of Mg-Al-Ca alloy was carried out by extrusion at 673 K and mechanical properties of the recycled Mg alloy were investigated by tensile tests. At room temperature, the recycled specimen showed a good combination of high ultimate tensile strength (348 MPa), high 0.2% proof stress (305 MPa) and large elongation (9%). Additionally, the recycled specimen exhibited superplastic behavior at 573 and 673 K. The excellent mechanical properties of the recycled specimen result most likely from fine dispersion of precipitates which is attained by hot extrusion.

An investigation of formation of second phases in microalloyed, AZ31 Mg alloys with Ca, Sr and Ce

“…The contents of Ca or Sr in such Mg-(4-7)%Al alloys are usually relatively high (≥1 wt%), and phases Al 2 Ca and Al 4 Sr were observed. It was also reported that when 0.2%Sr was added in Mg-5Al-1.8Ca-0.5Mn alloy, the Al 2 Sr phase was observed, but the Al 4 Sr phase cannot be seen [25]. In the present study, when 0.2%Ca or 0.2%Sr was added into AZ31 (Mg-3Al-1Zn) alloy, Al 2 Ca or Al 2 Sr was found.…”

Texture and Mechanical Properties of Mg-3Al-1Zn-0.5Mn-1.5Ca Alloy Produced by Torsion Extrusion

“…13) Besides, insoluble second phase particles (such as Al 2 Ca and Mg 2 Ca) in Mg-Al-Ca alloy is known to serve as nucleation sites for recrystallization during hot deformation. [14][15][16] Thus, it is expected that Ca addition in Mg alloy improves not only casting properties but also mechanical properties. In this study, the torsion extrusion was carried out on a Mg-Al-Ca alloy, and the relationships between microstructure, texture and mechanical properties were investigated.…”

Grain Refinement and Superplasticity Induced by Hot Compression of Continuously-Casted Mg-9Al-1Zn-1Ca and Mg-9Al-1Zn Alloys

“…9) Until now, there are some studies on dynamic recrystallization and mechanical properties of the Mg-Al-Ca alloys. 9,[11][12][13][14][15] In the present paper, continuously-casted Mg9Al-1Zn-1Ca and Mg-9Al-1Zn (in mass%) alloys with relatively coarse grain size (¼ 150{300 mm) are forged by hot compression at 573 K. DRX behavior during the hot compression is examined from the viewpoint of initial microstructures (distribution of second phases and Al segregation 16) ). The superplastic properties of the forged alloys are also investigated by tension tests at 573 K.…”