High temperature processing of Mg–Zn–Y alloys containing quasicrystal phase for high strength

A process to obtain high strength in a Mg–Zn–Y alloy containing quasicrystalline phase is described. The process involves solutionizing at a high temperature, precipitation of the quasicrystal phase during extrusion, followed by ageing. Tensile yield strengths of over 350 MPa are obtained with grain sizes of 14–20 μm.

► A process for high strength in Mg–Zn–Y alloys containing quasicrystalline phase. ► Solutionizing at high temperature, hot extrusion and ageing. ► Formation of nano-quasicrystal phase during extrusion. Fine precipitation of β1′. ► Tensile yield strengths of over 350 MPa, with grain sizes of 14–20 μm. ► Compressive yield strengths of about 250 MPa, ductility 8–14%.