Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment
Strengthening Mg alloys with rare earth elements has been a research focus for several decades. To minimize the usage of rare earth elements while enhancing mechanical properties, we adopted the strategy of alloying with multiple rare earth elements, namely Gd, Y, Nd, and Sm. Additionally, to promot...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-06-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/11/4155 |
| _version_ | 1797597136561373184 |
|---|---|
| author | Rui Fan Lei Wang Sicong Zhao Liping Wang Erjun Guo |
| author_facet | Rui Fan Lei Wang Sicong Zhao Liping Wang Erjun Guo |
| author_sort | Rui Fan |
| collection | DOAJ |
| description | Strengthening Mg alloys with rare earth elements has been a research focus for several decades. To minimize the usage of rare earth elements while enhancing mechanical properties, we adopted the strategy of alloying with multiple rare earth elements, namely Gd, Y, Nd, and Sm. Additionally, to promote the precipitation of basal precipitate, Ag and Zn doping was also induced. Thus, we designed a new cast Mg-2Gd-2Y-2Nd-2Sm-1Ag-1Zn-0.5Zr (wt.%) alloy. The microstructure of the alloy and its relevance to mechanical properties in various heat treatment conditions were investigated. After undergoing a heat treatment process, the alloy demonstrated exceptional mechanical properties, with a yield strength of 228 MPa and an ultimate tensile strength of 330 MPa achieved through peak-aging for 72 h at 200 °C. The excellent tensile properties are due to the synergistic effect of basal γ″ precipitate and prismatic β′ precipitate. In its as-cast state, its primary mode of fracture is inter-granular, whereas in the solid-solution and peak-aging conditions, the predominant mode of fracture is a mixture of trans-granular and inter-granular fractures. |
| first_indexed | 2024-03-11T03:02:31Z |
| format | Article |
| id | doaj.art-52fb264e6ada4a1d9cf926df0a43d678 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T03:02:31Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-52fb264e6ada4a1d9cf926df0a43d6782023-11-18T08:11:01ZengMDPI AGMaterials1996-19442023-06-011611415510.3390/ma16114155Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat TreatmentRui Fan0Lei Wang1Sicong Zhao2Liping Wang3Erjun Guo4Key Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150000, ChinaKey Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150000, ChinaKey Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150000, ChinaKey Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150000, ChinaKey Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150000, ChinaStrengthening Mg alloys with rare earth elements has been a research focus for several decades. To minimize the usage of rare earth elements while enhancing mechanical properties, we adopted the strategy of alloying with multiple rare earth elements, namely Gd, Y, Nd, and Sm. Additionally, to promote the precipitation of basal precipitate, Ag and Zn doping was also induced. Thus, we designed a new cast Mg-2Gd-2Y-2Nd-2Sm-1Ag-1Zn-0.5Zr (wt.%) alloy. The microstructure of the alloy and its relevance to mechanical properties in various heat treatment conditions were investigated. After undergoing a heat treatment process, the alloy demonstrated exceptional mechanical properties, with a yield strength of 228 MPa and an ultimate tensile strength of 330 MPa achieved through peak-aging for 72 h at 200 °C. The excellent tensile properties are due to the synergistic effect of basal γ″ precipitate and prismatic β′ precipitate. In its as-cast state, its primary mode of fracture is inter-granular, whereas in the solid-solution and peak-aging conditions, the predominant mode of fracture is a mixture of trans-granular and inter-granular fractures.https://www.mdpi.com/1996-1944/16/11/4155Mg alloymultiple rare earth elements alloyingAg and Zn dopingmicrostructuretensile properties |
| spellingShingle | Rui Fan Lei Wang Sicong Zhao Liping Wang Erjun Guo Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment Materials Mg alloy multiple rare earth elements alloying Ag and Zn doping microstructure tensile properties |
| title | Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment |
| title_full | Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment |
| title_fullStr | Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment |
| title_full_unstemmed | Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment |
| title_short | Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment |
| title_sort | strengthening of mg alloy with multiple re elements with ag and zn doping via heat treatment |
| topic | Mg alloy multiple rare earth elements alloying Ag and Zn doping microstructure tensile properties |
| url | https://www.mdpi.com/1996-1944/16/11/4155 |
| work_keys_str_mv | AT ruifan strengtheningofmgalloywithmultiplereelementswithagandzndopingviaheattreatment AT leiwang strengtheningofmgalloywithmultiplereelementswithagandzndopingviaheattreatment AT sicongzhao strengtheningofmgalloywithmultiplereelementswithagandzndopingviaheattreatment AT lipingwang strengtheningofmgalloywithmultiplereelementswithagandzndopingviaheattreatment AT erjunguo strengtheningofmgalloywithmultiplereelementswithagandzndopingviaheattreatment |