Microstructure and mechanical properties of ZE10 magnesium alloy prepared by equal channel angular pressing |
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Authors: | Ying Liu Wei Li |
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Institution: | a Department of Material Science and Engineering, Jinan University, Guangzhou 510632, China b School of Mechanical Engineering, South China University of Technology, Guangzhou 510640, China |
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Abstract: | 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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Keywords: | equal channel angular pressing magnesium alloys microstructure mechanical properties |
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