Microstructures and hot compression behavior of Mg-4Sn-1Ce alloy

Abstract:

The microstructures and hot compression behavior of Mg-4Sn-1Ce alloy were studied by optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM) and hot simulation test. The results shown that the as-cast alloy is mainly composed of island-like “island” shaped α-Mg、Mg2Sn、Ce4Sn5 and MgSnCe phases with the strain rate range of 0.001~1 s-1 and temperature range of 250~450 ℃ hot compression. The hot deformation activation energy Q is 162.03 kJ/mol. When the hot compression temperature increases from 250 to 450 ℃, the microstructures of tested alloy evolve from (compressed grains+extruded streamlines) to recrystallized equiaxed grains.

Key words:Mg-4Sn-1Ce alloy; Microstructures; Flow stress; Activation energy