Effect of Al Addition on Grain Refinement and Phase Transformation of the Mg-Gd-Y-Zn-Mn Alloy Containing LPSO Phase
The effect of 0–1.0 at.% Al additions on grain refinement and phase transformation of the Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn (at.%) alloy containing a long period stacking ordered (LPSO) phase was investigated in this work. The addition of Al promoted the formation of the Al<sub>2</sub>RE phase i...
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| author | Jing Zuo Mingquan Zhang Taiki Nakata Guisong Wang Danyang Li Hailong Shi Chao Xu Xiaojun Wang Wenjun Li Guohua Fan Lin Geng Shigeharu Kamado |
| author_facet | Jing Zuo Mingquan Zhang Taiki Nakata Guisong Wang Danyang Li Hailong Shi Chao Xu Xiaojun Wang Wenjun Li Guohua Fan Lin Geng Shigeharu Kamado |
| author_sort | Jing Zuo |
| collection | DOAJ |
| description | The effect of 0–1.0 at.% Al additions on grain refinement and phase transformation of the Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn (at.%) alloy containing a long period stacking ordered (LPSO) phase was investigated in this work. The addition of Al promoted the formation of the Al<sub>2</sub>RE phase in the Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn (at.%) alloy, and the dominant secondary phases in the as-cast Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn-1.0Al (at.%) alloy were the Mg<sub>3</sub>RE phase, LPSO phase, and Al<sub>2</sub>RE phase. With increased Al addition, the area fraction of the Al<sub>2</sub>RE phase increased monotonously, while the area fraction of LPSO phase and Mg<sub>3</sub>RE phase decreased gradually. The orientation relationship between the Al<sub>2</sub>RE phase and the α-Mg matrix was determined to be <112><sub>Al2RE/</sub>/<11<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover><mn>2</mn><mo>¯</mo></mover></mrow></semantics></math></inline-formula>0><sub>α-Mg</sub>, {101}<sub>Al2RE/</sub>/{10<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover><mn>1</mn><mo>¯</mo></mover></mrow></semantics></math></inline-formula>0}<sub>α-Mg</sub>, which was not affected by Zn and Mn concentrations in the Al<sub>2</sub>RE phase. Since the Al<sub>2</sub>RE particles with a size more than 6 μm located at the center of grains could act as nucleants for α-Mg grains, the average grain size of the as-cast alloys decreased from 276 μm to 49 μm after 1.0% Al addition. The effect of the Al addition on the grain refinement of the Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn alloy was comparable to that of the Zr refined counterpart. |
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| spelling | doaj.art-d7f54180c0304c0daa0341e564424fbf2023-11-23T23:16:28ZengMDPI AGMaterials1996-19442022-02-01155163210.3390/ma15051632Effect of Al Addition on Grain Refinement and Phase Transformation of the Mg-Gd-Y-Zn-Mn Alloy Containing LPSO PhaseJing Zuo0Mingquan Zhang1Taiki Nakata2Guisong Wang3Danyang Li4Hailong Shi5Chao Xu6Xiaojun Wang7Wenjun Li8Guohua Fan9Lin Geng10Shigeharu Kamado11Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka 940-2188, JapanSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaDepartment of Mechanical Engineering, Nagaoka University of Technology, Nagaoka 940-2188, JapanSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaDepartment of Mechanical Engineering, Nagaoka University of Technology, Nagaoka 940-2188, JapanSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaBeijing Institute of Spacecraft Systems Engineering, Beijing 100086, ChinaKey Laboratory for Light-weight Materials, Nanjing Tech University, Nanjing 211816, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaDepartment of Mechanical Engineering, Nagaoka University of Technology, Nagaoka 940-2188, JapanThe effect of 0–1.0 at.% Al additions on grain refinement and phase transformation of the Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn (at.%) alloy containing a long period stacking ordered (LPSO) phase was investigated in this work. The addition of Al promoted the formation of the Al<sub>2</sub>RE phase in the Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn (at.%) alloy, and the dominant secondary phases in the as-cast Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn-1.0Al (at.%) alloy were the Mg<sub>3</sub>RE phase, LPSO phase, and Al<sub>2</sub>RE phase. With increased Al addition, the area fraction of the Al<sub>2</sub>RE phase increased monotonously, while the area fraction of LPSO phase and Mg<sub>3</sub>RE phase decreased gradually. The orientation relationship between the Al<sub>2</sub>RE phase and the α-Mg matrix was determined to be <112><sub>Al2RE/</sub>/<11<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover><mn>2</mn><mo>¯</mo></mover></mrow></semantics></math></inline-formula>0><sub>α-Mg</sub>, {101}<sub>Al2RE/</sub>/{10<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover><mn>1</mn><mo>¯</mo></mover></mrow></semantics></math></inline-formula>0}<sub>α-Mg</sub>, which was not affected by Zn and Mn concentrations in the Al<sub>2</sub>RE phase. Since the Al<sub>2</sub>RE particles with a size more than 6 μm located at the center of grains could act as nucleants for α-Mg grains, the average grain size of the as-cast alloys decreased from 276 μm to 49 μm after 1.0% Al addition. The effect of the Al addition on the grain refinement of the Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn alloy was comparable to that of the Zr refined counterpart.https://www.mdpi.com/1996-1944/15/5/1632magnesium alloysrare earth (RE)grain refinementsecondary phases |
| spellingShingle | Jing Zuo Mingquan Zhang Taiki Nakata Guisong Wang Danyang Li Hailong Shi Chao Xu Xiaojun Wang Wenjun Li Guohua Fan Lin Geng Shigeharu Kamado Effect of Al Addition on Grain Refinement and Phase Transformation of the Mg-Gd-Y-Zn-Mn Alloy Containing LPSO Phase Materials magnesium alloys rare earth (RE) grain refinement secondary phases |
| title | Effect of Al Addition on Grain Refinement and Phase Transformation of the Mg-Gd-Y-Zn-Mn Alloy Containing LPSO Phase |
| title_full | Effect of Al Addition on Grain Refinement and Phase Transformation of the Mg-Gd-Y-Zn-Mn Alloy Containing LPSO Phase |
| title_fullStr | Effect of Al Addition on Grain Refinement and Phase Transformation of the Mg-Gd-Y-Zn-Mn Alloy Containing LPSO Phase |
| title_full_unstemmed | Effect of Al Addition on Grain Refinement and Phase Transformation of the Mg-Gd-Y-Zn-Mn Alloy Containing LPSO Phase |
| title_short | Effect of Al Addition on Grain Refinement and Phase Transformation of the Mg-Gd-Y-Zn-Mn Alloy Containing LPSO Phase |
| title_sort | effect of al addition on grain refinement and phase transformation of the mg gd y zn mn alloy containing lpso phase |
| topic | magnesium alloys rare earth (RE) grain refinement secondary phases |
| url | https://www.mdpi.com/1996-1944/15/5/1632 |
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