Investigation on enhancing strength and ductility of as-cast Mg-Gd-Y-Zn-Zr alloy by fine-tuning Zn/RE ratio
The Zn/RE ratio has a significant impact on the microstructure and mechanical properties of the as-cast Mg-Gd-Y-Zr alloys. In this work, the formation of microstructure in Mg-9Gd-3Y-xZn-0.5Zr is regulated through fine-tuning the Zn/RE ratio, and in-depth characterization and analysis are conducted t...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029107 |
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| author | Yongfeng Li Ang Zhang Chuangming Li Hecong Xie Hengrui Hu Bin Jiang Yuyang Gao Yuhong Cui Zongliang Tan Zhihua Dong Fusheng Pan |
| author_facet | Yongfeng Li Ang Zhang Chuangming Li Hecong Xie Hengrui Hu Bin Jiang Yuyang Gao Yuhong Cui Zongliang Tan Zhihua Dong Fusheng Pan |
| author_sort | Yongfeng Li |
| collection | DOAJ |
| description | The Zn/RE ratio has a significant impact on the microstructure and mechanical properties of the as-cast Mg-Gd-Y-Zr alloys. In this work, the formation of microstructure in Mg-9Gd-3Y-xZn-0.5Zr is regulated through fine-tuning the Zn/RE ratio, and in-depth characterization and analysis are conducted to explore the influence of Zn/RE ratio on the strength and ductility. The effect of the LPSO phases, kinks, and {10 1‾ 2} twins enable the as-cast alloy with Zn/RE ratio of 0.25 to have ultimate tensile strength, yield strength, and elongation of 265.5 MPa, 164.3 MPa, and 7.4 %, respectively. In ''twin + kink'' mode, the twin stress is released through stress relaxation caused by kinks prevents premature cracking and improve strength. The increase in strength results from the LPSO phases hindering dislocations and kink strengthening. The improvement in ductility is attributed to the {10 1‾ 2} twins facilitating the grain deviation from hard orientations and the activation of non-basal <c+a> slip. This research deepens understanding of the strengthening and plasticizing mechanism in as-cast Mg-RE alloys, providing conditions for further enhancing the performance limits of heat-treated or deformed Mg-RE alloys. |
| format | Article |
| id | doaj-art-d46ddbcfa1cb4a53b7ed0c1eaa61f9bc |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-d46ddbcfa1cb4a53b7ed0c1eaa61f9bc2025-01-19T06:25:28ZengElsevierJournal of Materials Research and Technology2238-78542025-01-0134845854Investigation on enhancing strength and ductility of as-cast Mg-Gd-Y-Zn-Zr alloy by fine-tuning Zn/RE ratioYongfeng Li0Ang Zhang1Chuangming Li2Hecong Xie3Hengrui Hu4Bin Jiang5Yuyang Gao6Yuhong Cui7Zongliang Tan8Zhihua Dong9Fusheng Pan10National Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaNational Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Corresponding author.National Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaNational Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaNational Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaNational Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Corresponding author.National Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaQinghai Salt Lake Teli Magnesium Co., Ltd, Qinghai, 810000, ChinaQinghai Salt Lake Teli Magnesium Co., Ltd, Qinghai, 810000, ChinaNational Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaNational Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaThe Zn/RE ratio has a significant impact on the microstructure and mechanical properties of the as-cast Mg-Gd-Y-Zr alloys. In this work, the formation of microstructure in Mg-9Gd-3Y-xZn-0.5Zr is regulated through fine-tuning the Zn/RE ratio, and in-depth characterization and analysis are conducted to explore the influence of Zn/RE ratio on the strength and ductility. The effect of the LPSO phases, kinks, and {10 1‾ 2} twins enable the as-cast alloy with Zn/RE ratio of 0.25 to have ultimate tensile strength, yield strength, and elongation of 265.5 MPa, 164.3 MPa, and 7.4 %, respectively. In ''twin + kink'' mode, the twin stress is released through stress relaxation caused by kinks prevents premature cracking and improve strength. The increase in strength results from the LPSO phases hindering dislocations and kink strengthening. The improvement in ductility is attributed to the {10 1‾ 2} twins facilitating the grain deviation from hard orientations and the activation of non-basal <c+a> slip. This research deepens understanding of the strengthening and plasticizing mechanism in as-cast Mg-RE alloys, providing conditions for further enhancing the performance limits of heat-treated or deformed Mg-RE alloys.http://www.sciencedirect.com/science/article/pii/S2238785424029107Mg-RE alloyZn/RE ratioMicrostructureStrengthening |
| spellingShingle | Yongfeng Li Ang Zhang Chuangming Li Hecong Xie Hengrui Hu Bin Jiang Yuyang Gao Yuhong Cui Zongliang Tan Zhihua Dong Fusheng Pan Investigation on enhancing strength and ductility of as-cast Mg-Gd-Y-Zn-Zr alloy by fine-tuning Zn/RE ratio Journal of Materials Research and Technology Mg-RE alloy Zn/RE ratio Microstructure Strengthening |
| title | Investigation on enhancing strength and ductility of as-cast Mg-Gd-Y-Zn-Zr alloy by fine-tuning Zn/RE ratio |
| title_full | Investigation on enhancing strength and ductility of as-cast Mg-Gd-Y-Zn-Zr alloy by fine-tuning Zn/RE ratio |
| title_fullStr | Investigation on enhancing strength and ductility of as-cast Mg-Gd-Y-Zn-Zr alloy by fine-tuning Zn/RE ratio |
| title_full_unstemmed | Investigation on enhancing strength and ductility of as-cast Mg-Gd-Y-Zn-Zr alloy by fine-tuning Zn/RE ratio |
| title_short | Investigation on enhancing strength and ductility of as-cast Mg-Gd-Y-Zn-Zr alloy by fine-tuning Zn/RE ratio |
| title_sort | investigation on enhancing strength and ductility of as cast mg gd y zn zr alloy by fine tuning zn re ratio |
| topic | Mg-RE alloy Zn/RE ratio Microstructure Strengthening |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029107 |
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