Microstructure and mechanical properties of as-extruded Mg-Sn-Zn-Ca alloy with different extrusion ratios |
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| Authors: | Yang ZHANG Xiao-yang CHEN Ya-lin LU Xiao-ping LI |
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| Affiliation: | 1. School of Materials Engineering, Jiangsu University of Technology, Changzhou 213001, China;2. School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China |
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| Abstract: | The effect of extrusion ratio on microstructure and mechanical properties of as-extruded Mg-6Sn-2Zn-1Ca (TZX621) (mass fraction, %) alloy was investigated. It is found that incomplete dynamic recrystallization (DRX) took place in as-extruded TZX621 alloy. As the extrusion ratio was increased from 6 to 16, both fraction of un-DRXed grains and average size of DRXed grains in as-extruded TZX621 alloy decreased and the basal texture was weakened. Coarse CaMgSn phase was broken into particles and fine Mg2Sn phase precipitated from α-Mg matrix during hot extrusion. Yield strength, ultimate tensile strength and elongation of as-extruded TZX621 alloy with extrusion ratio of 16 reached 226.9 MPa, 295.6 MPa and 18.1%, which were improved by 36.0%, 17.7% and 13.5%, respectively, compared to those of as-extruded TZX621 alloy with extrusion ratio of 6. |
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| Keywords: | Mg-Sn alloy extrusion ratio microstructure texture mechanical properties |
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