Effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys
The effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys were investigated in this study. The Mg–6Zn–4Sn–1Mn–xCa (x = 0, 0.2, 0.5, 1 and 2 wt%) alloys consist of the α-Mg, Mg2Sn, Mg7Zn3, MgZn, α-Mn, CaMgSn, MgZn2, Mg2Ca and Ca2Mg6Zn3 phases. With increasing Ca...
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423014424 |
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| author | Caihong Hou Fugang Qi Lifei Wang Liwei Lu Nie Zhao Jia She Yun Zhou Xiaoping Ouyang |
| author_facet | Caihong Hou Fugang Qi Lifei Wang Liwei Lu Nie Zhao Jia She Yun Zhou Xiaoping Ouyang |
| author_sort | Caihong Hou |
| collection | DOAJ |
| description | The effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys were investigated in this study. The Mg–6Zn–4Sn–1Mn–xCa (x = 0, 0.2, 0.5, 1 and 2 wt%) alloys consist of the α-Mg, Mg2Sn, Mg7Zn3, MgZn, α-Mn, CaMgSn, MgZn2, Mg2Ca and Ca2Mg6Zn3 phases. With increasing Ca content, the eutectic phase and grains were refined, and the morphologies of the CaMgSn phases changed from point-like to needle-like, rod-like and lath-like. At room temperature, small amounts of Ca can improve properties owing to refinement strengthening. The two-stage aged Mg–6Zn–4Sn–1Mn–0.2Ca alloy has the best comprehensive properties at room temperature, with an ultimate tensile strength (UTS), yield strength (YS) and elongation of 407 MPa, 392 MPa and 6.2%, respectively. When the Ca content increased, the number of CaMgSn phases increased, and the morphologies coarsened. Further, it was a brittle phase, resulting in the deterioration of alloy properties. At high temperatures, a small amount of Ca can improve the high-temperature plasticity. The elongations of the as-extruded Mg–6Zn–4Sn–1Mn–0.2Ca alloy were 76.9% (150 °C) and 133.8% (200 °C). A high Ca concentration can significantly improve the high-temperature strengths because of the good thermal stability of the CaMgSn phases, the best UTS and YS are 160 MPa and 136 MPa, respectively, in as-extruded Mg–6Zn–4Sn–1Mn–2Ca alloy at 150 °C. |
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| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:19:54Z |
| publishDate | 2023-07-01 |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-6cdb1ebeca3446ce911a9f6b42cbe6112023-08-11T05:33:52ZengElsevierJournal of Materials Research and Technology2238-78542023-07-012538843900Effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloysCaihong Hou0Fugang Qi1Lifei Wang2Liwei Lu3Nie Zhao4Jia She5Yun Zhou6Xiaoping Ouyang7School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, PR ChinaSchool of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, PR China; Corresponding author.Shanxi Key Laboratory of Advanced Magnesium-based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR ChinaSchool of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan, 411201, PR ChinaSchool of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, PR ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400045, PR ChinaSchool of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, PR China; Corresponding author.School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, PR ChinaThe effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys were investigated in this study. The Mg–6Zn–4Sn–1Mn–xCa (x = 0, 0.2, 0.5, 1 and 2 wt%) alloys consist of the α-Mg, Mg2Sn, Mg7Zn3, MgZn, α-Mn, CaMgSn, MgZn2, Mg2Ca and Ca2Mg6Zn3 phases. With increasing Ca content, the eutectic phase and grains were refined, and the morphologies of the CaMgSn phases changed from point-like to needle-like, rod-like and lath-like. At room temperature, small amounts of Ca can improve properties owing to refinement strengthening. The two-stage aged Mg–6Zn–4Sn–1Mn–0.2Ca alloy has the best comprehensive properties at room temperature, with an ultimate tensile strength (UTS), yield strength (YS) and elongation of 407 MPa, 392 MPa and 6.2%, respectively. When the Ca content increased, the number of CaMgSn phases increased, and the morphologies coarsened. Further, it was a brittle phase, resulting in the deterioration of alloy properties. At high temperatures, a small amount of Ca can improve the high-temperature plasticity. The elongations of the as-extruded Mg–6Zn–4Sn–1Mn–0.2Ca alloy were 76.9% (150 °C) and 133.8% (200 °C). A high Ca concentration can significantly improve the high-temperature strengths because of the good thermal stability of the CaMgSn phases, the best UTS and YS are 160 MPa and 136 MPa, respectively, in as-extruded Mg–6Zn–4Sn–1Mn–2Ca alloy at 150 °C.http://www.sciencedirect.com/science/article/pii/S2238785423014424Mg–Zn–Sn–Mn alloyCaMicrostructureMechanical properties |
| spellingShingle | Caihong Hou Fugang Qi Lifei Wang Liwei Lu Nie Zhao Jia She Yun Zhou Xiaoping Ouyang Effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys Journal of Materials Research and Technology Mg–Zn–Sn–Mn alloy Ca Microstructure Mechanical properties |
| title | Effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys |
| title_full | Effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys |
| title_fullStr | Effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys |
| title_full_unstemmed | Effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys |
| title_short | Effects of Ca addition on the microstructure and mechanical properties of Mg–Zn–Sn–Mn alloys |
| title_sort | effects of ca addition on the microstructure and mechanical properties of mg zn sn mn alloys |
| topic | Mg–Zn–Sn–Mn alloy Ca Microstructure Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423014424 |
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