Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys
The microstructures and mechanical properties of Mg–3Sn–0.1Ca–xMM (mischmetal, x = 0.3, 0.6, and 0.9 wt.%) alloys were investigated. Optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction spectroscopy (XRD) were used to characterize the microstructures and phase constituti...
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MDPI AG
2023-09-01
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| author | Jun Luo Lijun Dong Guowei Zhong Zhenxing Duan Shuang Chen Anru Wu |
| author_facet | Jun Luo Lijun Dong Guowei Zhong Zhenxing Duan Shuang Chen Anru Wu |
| author_sort | Jun Luo |
| collection | DOAJ |
| description | The microstructures and mechanical properties of Mg–3Sn–0.1Ca–xMM (mischmetal, x = 0.3, 0.6, and 0.9 wt.%) alloys were investigated. Optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction spectroscopy (XRD) were used to characterize the microstructures and phase constitutions of the cast and rolled alloys. Room temperature tensile tests were conducted to obtain the mechanical properties and macro-textures to evaluate the texture weakening effect results of the MM. The results show that an abundance of second phase formed, confirmed as the (Ca,MM)MgSn phase, and the volume fraction increased with the increasing MM addition. The tensile yield strength of the as-cast alloys increased with the MM addition, but the elongation decreased. All of the rolled Mg–3Sn–0.1Ca–xMM alloys showed a strong basal texture, and only slightly decreased in intensity after annealing treatment due to the particle-stimulated nucleation of recrystallization. The as-annealed Mg–3Sn–0.1Ca–0.6MM alloys exhibited the highest tensile strengths of 266.5 ± 3.3 MPa and 136.1 ± 3.7 MPa, which are mainly ascribed to grain refinement strengthening, Orowan strengthening and texture strengthening. |
| first_indexed | 2024-03-10T22:53:38Z |
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| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T22:53:38Z |
| publishDate | 2023-09-01 |
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| spelling | doaj.art-d2dbcba9931e42228e80d508ef6b79002023-11-19T10:09:51ZengMDPI AGCrystals2073-43522023-09-01139137910.3390/cryst13091379Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca AlloysJun Luo0Lijun Dong1Guowei Zhong2Zhenxing Duan3Shuang Chen4Anru Wu5Hunan Provincial Key Laboratory of Vehicle Power and Transmission System, Hunan Institute of Engineering, Xiangtan 411104, ChinaHunan Provincial Key Laboratory of Vehicle Power and Transmission System, Hunan Institute of Engineering, Xiangtan 411104, ChinaSchool of Mechanical Engineering, Hunan Institute of Engineering, Xiangtan 411104, ChinaSchool of Mechanical Engineering, Hunan Institute of Engineering, Xiangtan 411104, ChinaHunan Provincial Key Laboratory of Vehicle Power and Transmission System, Hunan Institute of Engineering, Xiangtan 411104, ChinaHunan Provincial Key Laboratory of Vehicle Power and Transmission System, Hunan Institute of Engineering, Xiangtan 411104, ChinaThe microstructures and mechanical properties of Mg–3Sn–0.1Ca–xMM (mischmetal, x = 0.3, 0.6, and 0.9 wt.%) alloys were investigated. Optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction spectroscopy (XRD) were used to characterize the microstructures and phase constitutions of the cast and rolled alloys. Room temperature tensile tests were conducted to obtain the mechanical properties and macro-textures to evaluate the texture weakening effect results of the MM. The results show that an abundance of second phase formed, confirmed as the (Ca,MM)MgSn phase, and the volume fraction increased with the increasing MM addition. The tensile yield strength of the as-cast alloys increased with the MM addition, but the elongation decreased. All of the rolled Mg–3Sn–0.1Ca–xMM alloys showed a strong basal texture, and only slightly decreased in intensity after annealing treatment due to the particle-stimulated nucleation of recrystallization. The as-annealed Mg–3Sn–0.1Ca–0.6MM alloys exhibited the highest tensile strengths of 266.5 ± 3.3 MPa and 136.1 ± 3.7 MPa, which are mainly ascribed to grain refinement strengthening, Orowan strengthening and texture strengthening.https://www.mdpi.com/2073-4352/13/9/1379Mg–Sn alloysmischmetalmicrostructuretexturemechanical properties |
| spellingShingle | Jun Luo Lijun Dong Guowei Zhong Zhenxing Duan Shuang Chen Anru Wu Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys Crystals Mg–Sn alloys mischmetal microstructure texture mechanical properties |
| title | Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys |
| title_full | Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys |
| title_fullStr | Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys |
| title_full_unstemmed | Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys |
| title_short | Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys |
| title_sort | effect of mischmetal addition on microstructure and mechanical properties of as cast and as rolled mg sn ca alloys |
| topic | Mg–Sn alloys mischmetal microstructure texture mechanical properties |
| url | https://www.mdpi.com/2073-4352/13/9/1379 |
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