Microstructure and mechanical properties of ZE10 magnesium alloy prepared by equal channel angular pressing

Ying Liu1),Wei Li1),and Yuan-yuan Li2) 1) Department of Material Science and Engineering,Jinan University,Guangzhou 510632,China 2) School of Mechanical Engineering,South China University of Technology,Guangzhou 510640,China

摘 要：ZE10 magnesium alloy was subjected to equal-channel angular pressing（ECAP） up to 12 passes in a die with an angle of 120° between the two channels at 250-300°C.An inhomogeneous microstructure of bimodal grains including fine grains of 1-2 μm as well as coarse grains of about 20 μm was obtained after the initial 1-4 ECAP passes.The grain size became increasingly homogeneous with further ECAP processing and the grains were significantly refined to 1-2 μm after 8 passes and further refined to 0.5-1 μm after 12 passes.The alloy’s yield strength changed slightly but the ductility improved greatly initially up to 4-6 passes corresponding to the bimodal grain microstructure.And after the subsequent pressing of more than 8 passes,the tensile strength including yield strength improved while the elongation decreased gradually.

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