Achieving low tension-compression yield asymmetry and ultrahigh strength in Mg–1Al–1Ca–0.2Mn (wt%) alloy via sub-micron grain refinement
Traditional low-alloyed Mg–Al–Ca–Mn extrusion alloys always show a low strength and a high tension-compression yield asymmetry. In the present work, Mg–1Al–1Ca–0.2Mn (AXM1102, wt.%) alloys were extruded at 150–350 °C to produce different grain structure and mechanical properties. It is shown that AX...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423031940 |
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| author | Xiaoqing Liu Xiaoguang Qiao Xianke Zhang Dongdong Zhang Lei Xiao Wojun Zhong Xiurong Zhu Jichun Lian Mingyi Zheng |
| author_facet | Xiaoqing Liu Xiaoguang Qiao Xianke Zhang Dongdong Zhang Lei Xiao Wojun Zhong Xiurong Zhu Jichun Lian Mingyi Zheng |
| author_sort | Xiaoqing Liu |
| collection | DOAJ |
| description | Traditional low-alloyed Mg–Al–Ca–Mn extrusion alloys always show a low strength and a high tension-compression yield asymmetry. In the present work, Mg–1Al–1Ca–0.2Mn (AXM1102, wt.%) alloys were extruded at 150–350 °C to produce different grain structure and mechanical properties. It is shown that AXM1102-150 (extruded at 150 °C) sample exhibits superhigh strength in both tension and compression, which exhibited a yield strength (YS) of 428 MPa in tension and 416 MPa in compression. Namely, ultrahigh strength and low tension-compression yield asymmetry were both obtained. The ultrahigh strength was found to be ascribed to the ultra-fine dynamically recrystallized (DRXed) grains (0.47 μm) together with grain boundary co-segregation of Ca and Al atoms. Submicron DRXed grains accounts for the improved tension-compression yield asymmetry through suppressing {10-12} twining during compression. Additionally, the discontinuous yielding was detected during tension of AXM1102-150 alloy, which is potentially related with the high energy barrier required for dislocation emission caused by grain boundary co-segregation of Al and Ca atoms. Once the tensile stress reaches the peak value, the mobile dislocation density increases immediately, thus the tensile stress-strain behavior of the AXM1102-150 alloy is dominated by strain softening. The results indicate that low-alloyed Mg–Al–Ca–Mn alloys demonstrate tremendous potential as next generation ultrahigh-strength and low tension-compression yield asymmetry wrought Mg alloys. |
| first_indexed | 2024-03-08T09:29:31Z |
| format | Article |
| id | doaj.art-fde946bc5dab4189b46d97064867c4a5 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-08T09:29:31Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-fde946bc5dab4189b46d97064867c4a52024-01-31T05:43:42ZengElsevierJournal of Materials Research and Technology2238-78542024-01-012822352246Achieving low tension-compression yield asymmetry and ultrahigh strength in Mg–1Al–1Ca–0.2Mn (wt%) alloy via sub-micron grain refinementXiaoqing Liu0Xiaoguang Qiao1Xianke Zhang2Dongdong Zhang3Lei Xiao4Wojun Zhong5Xiurong Zhu6Jichun Lian7Mingyi Zheng8School of Physics and Electronics, Gannan Normal University, Ganzhou, 341000, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, ChinaSchool of Physics and Electronics, Gannan Normal University, Ganzhou, 341000, ChinaSchool of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, ChinaSchool of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, ChinaSchool of Physics and Electronics, Gannan Normal University, Ganzhou, 341000, ChinaSchool of Physics and Electronics, Gannan Normal University, Ganzhou, 341000, ChinaSchool of Physics and Electronics, Gannan Normal University, Ganzhou, 341000, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China; Corresponding author.Traditional low-alloyed Mg–Al–Ca–Mn extrusion alloys always show a low strength and a high tension-compression yield asymmetry. In the present work, Mg–1Al–1Ca–0.2Mn (AXM1102, wt.%) alloys were extruded at 150–350 °C to produce different grain structure and mechanical properties. It is shown that AXM1102-150 (extruded at 150 °C) sample exhibits superhigh strength in both tension and compression, which exhibited a yield strength (YS) of 428 MPa in tension and 416 MPa in compression. Namely, ultrahigh strength and low tension-compression yield asymmetry were both obtained. The ultrahigh strength was found to be ascribed to the ultra-fine dynamically recrystallized (DRXed) grains (0.47 μm) together with grain boundary co-segregation of Ca and Al atoms. Submicron DRXed grains accounts for the improved tension-compression yield asymmetry through suppressing {10-12} twining during compression. Additionally, the discontinuous yielding was detected during tension of AXM1102-150 alloy, which is potentially related with the high energy barrier required for dislocation emission caused by grain boundary co-segregation of Al and Ca atoms. Once the tensile stress reaches the peak value, the mobile dislocation density increases immediately, thus the tensile stress-strain behavior of the AXM1102-150 alloy is dominated by strain softening. The results indicate that low-alloyed Mg–Al–Ca–Mn alloys demonstrate tremendous potential as next generation ultrahigh-strength and low tension-compression yield asymmetry wrought Mg alloys.http://www.sciencedirect.com/science/article/pii/S2238785423031940Wrought Mg alloyTension-compression yield asymmetryExtrusion temperatureDiscontinuous yieldingUltrahigh strength |
| spellingShingle | Xiaoqing Liu Xiaoguang Qiao Xianke Zhang Dongdong Zhang Lei Xiao Wojun Zhong Xiurong Zhu Jichun Lian Mingyi Zheng Achieving low tension-compression yield asymmetry and ultrahigh strength in Mg–1Al–1Ca–0.2Mn (wt%) alloy via sub-micron grain refinement Journal of Materials Research and Technology Wrought Mg alloy Tension-compression yield asymmetry Extrusion temperature Discontinuous yielding Ultrahigh strength |
| title | Achieving low tension-compression yield asymmetry and ultrahigh strength in Mg–1Al–1Ca–0.2Mn (wt%) alloy via sub-micron grain refinement |
| title_full | Achieving low tension-compression yield asymmetry and ultrahigh strength in Mg–1Al–1Ca–0.2Mn (wt%) alloy via sub-micron grain refinement |
| title_fullStr | Achieving low tension-compression yield asymmetry and ultrahigh strength in Mg–1Al–1Ca–0.2Mn (wt%) alloy via sub-micron grain refinement |
| title_full_unstemmed | Achieving low tension-compression yield asymmetry and ultrahigh strength in Mg–1Al–1Ca–0.2Mn (wt%) alloy via sub-micron grain refinement |
| title_short | Achieving low tension-compression yield asymmetry and ultrahigh strength in Mg–1Al–1Ca–0.2Mn (wt%) alloy via sub-micron grain refinement |
| title_sort | achieving low tension compression yield asymmetry and ultrahigh strength in mg 1al 1ca 0 2mn wt alloy via sub micron grain refinement |
| topic | Wrought Mg alloy Tension-compression yield asymmetry Extrusion temperature Discontinuous yielding Ultrahigh strength |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423031940 |
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