Influence of rare earth addition on microstructures and mechanical properties of high-pressure die casting Mg–8Zn–6Al alloy
Effects of 3 wt% RE (rare earth) addition on microstructures and mechanical properties of a high-pressure die casting Mg–8Zn–6Al (ZA86) alloy before and after aging treatment was thoroughly studied in this work. Microstructural characterizations present that RE addition has indiscernible influence o...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423022482 |
| _version_ | 1827780452317921280 |
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| author | Xiaohan Wu Qiang Yang Tao Xu Jinghuai Zhang Pengyue Wang Chenggang Wang Wei Sun Xin Qiu |
| author_facet | Xiaohan Wu Qiang Yang Tao Xu Jinghuai Zhang Pengyue Wang Chenggang Wang Wei Sun Xin Qiu |
| author_sort | Xiaohan Wu |
| collection | DOAJ |
| description | Effects of 3 wt% RE (rare earth) addition on microstructures and mechanical properties of a high-pressure die casting Mg–8Zn–6Al (ZA86) alloy before and after aging treatment was thoroughly studied in this work. Microstructural characterizations present that RE addition has indiscernible influence on the well-defined dendrite structure and grain size, but would additionally introduce Al-RE intermetallic phases, which were identified as Al3RE and Al11RE. Simultaneously, two groups of Mg–Al–Zn ternary phases were detected in alloys with/without RE addition, while their volume fraction was clearly reduced by RE addition. After aging at 90 °C for 320 h, a large density of precipitates were observed particularly near grain/cell boundaries, and were identified as MgZn2, Mg4Zn7, and I-phase. Although RE addition seems to have no influence on the components of precipitates, it obviously improves their volume fraction and slightly increases their size. Finally, the yield strength of the ZA86 alloy after aging was improved by ∼33 MPa by RE addition. Therefore, the die cat ZA86 alloy exhibits high-strength and certain precipitation strengthening ability, and RE addition can significantly enhance the precipitation strengthening, accomplishing the highest yield strength in the reported HPDC magnesium alloys, being ∼267 MPa. |
| first_indexed | 2024-03-11T15:04:47Z |
| format | Article |
| id | doaj.art-74b51818f14e4f82adaf2016c9d1c427 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:04:47Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-74b51818f14e4f82adaf2016c9d1c4272023-10-30T06:04:40ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012679127924Influence of rare earth addition on microstructures and mechanical properties of high-pressure die casting Mg–8Zn–6Al alloyXiaohan Wu0Qiang Yang1Tao Xu2Jinghuai Zhang3Pengyue Wang4Chenggang Wang5Wei Sun6Xin Qiu7State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China; Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, PR ChinaState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China; Corresponding author.Kashui International Holdings Limited, Shenzhen, Guangdong, 518111, PR ChinaKey Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, PR ChinaFaw Foundry Co., Ltd., Changchun, 130062, PR ChinaFaw Foundry Co., Ltd., Changchun, 130062, PR ChinaState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR ChinaState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China; Corresponding author.Effects of 3 wt% RE (rare earth) addition on microstructures and mechanical properties of a high-pressure die casting Mg–8Zn–6Al (ZA86) alloy before and after aging treatment was thoroughly studied in this work. Microstructural characterizations present that RE addition has indiscernible influence on the well-defined dendrite structure and grain size, but would additionally introduce Al-RE intermetallic phases, which were identified as Al3RE and Al11RE. Simultaneously, two groups of Mg–Al–Zn ternary phases were detected in alloys with/without RE addition, while their volume fraction was clearly reduced by RE addition. After aging at 90 °C for 320 h, a large density of precipitates were observed particularly near grain/cell boundaries, and were identified as MgZn2, Mg4Zn7, and I-phase. Although RE addition seems to have no influence on the components of precipitates, it obviously improves their volume fraction and slightly increases their size. Finally, the yield strength of the ZA86 alloy after aging was improved by ∼33 MPa by RE addition. Therefore, the die cat ZA86 alloy exhibits high-strength and certain precipitation strengthening ability, and RE addition can significantly enhance the precipitation strengthening, accomplishing the highest yield strength in the reported HPDC magnesium alloys, being ∼267 MPa.http://www.sciencedirect.com/science/article/pii/S2238785423022482High-pressure die castMagnesium alloyMicrostructurePrecipitationMechanical properties |
| spellingShingle | Xiaohan Wu Qiang Yang Tao Xu Jinghuai Zhang Pengyue Wang Chenggang Wang Wei Sun Xin Qiu Influence of rare earth addition on microstructures and mechanical properties of high-pressure die casting Mg–8Zn–6Al alloy Journal of Materials Research and Technology High-pressure die cast Magnesium alloy Microstructure Precipitation Mechanical properties |
| title | Influence of rare earth addition on microstructures and mechanical properties of high-pressure die casting Mg–8Zn–6Al alloy |
| title_full | Influence of rare earth addition on microstructures and mechanical properties of high-pressure die casting Mg–8Zn–6Al alloy |
| title_fullStr | Influence of rare earth addition on microstructures and mechanical properties of high-pressure die casting Mg–8Zn–6Al alloy |
| title_full_unstemmed | Influence of rare earth addition on microstructures and mechanical properties of high-pressure die casting Mg–8Zn–6Al alloy |
| title_short | Influence of rare earth addition on microstructures and mechanical properties of high-pressure die casting Mg–8Zn–6Al alloy |
| title_sort | influence of rare earth addition on microstructures and mechanical properties of high pressure die casting mg 8zn 6al alloy |
| topic | High-pressure die cast Magnesium alloy Microstructure Precipitation Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423022482 |
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