Research on microstructure and mechanical properties of hot extruded Mg-Gd-Y-Sm-Zr alloy at room and high temperatures
In this study, the age hardening behavior of hot extruded Mg-8Gd-4Y-1Sm-0.5Zr (GWS841) alloy, mechanical properties and microstructural evolution of hot extruded GWS841 alloy during elevated temperature tensile processes were mainly investigated. The results show that the hot extrusion aged GWS841 a...
| Main Authors: | , , , , |
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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/S2238785423033513 |
| _version_ | 1797338305133543424 |
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| author | Ruitao Cheng Lipeng Yan Xiaoke Li Zhen Feng Guang Su |
| author_facet | Ruitao Cheng Lipeng Yan Xiaoke Li Zhen Feng Guang Su |
| author_sort | Ruitao Cheng |
| collection | DOAJ |
| description | In this study, the age hardening behavior of hot extruded Mg-8Gd-4Y-1Sm-0.5Zr (GWS841) alloy, mechanical properties and microstructural evolution of hot extruded GWS841 alloy during elevated temperature tensile processes were mainly investigated. The results show that the hot extrusion aged GWS841 alloy possess excellent mechanical properties at room and high temperature, which are 397 MPa, 386 MPa, 376 MPa, and 312 MPa at 25 °C, 200 °C, 250 °C, and 300 °C, respectively. After aging for 200 °C × 96 h, the hot extruded GWS841 alloy reaches its maximum hardness and room temperature tensile strength, and strengthening precipitation phase, being nano β′ phase, approximately 12 nm × 20 nm in size, precipitates simultaneously in three prismatic planes, (1‾21‾0)α、 (1‾1‾20)α and (21‾1‾0)α planes, which present precipitation strengthening behavior. During tensile testing at 200 °C, the strengthening precipitate remains β′ phase. During elevated tensile processes at 250 °C and 300 °C, strengthening precipitation phase undergoes significant transformation at grain boundary, β′ phase → β phase, and additionally, nano precipitation zone formed by rare earth atoms aggregation along grain boundary, which strengthen the grain boundary. During elevated tensile deformation at 300 °C, β′ phase completely disappeared and transformed into nano rare earth atom cluster region uniformly distributing inner grain. |
| first_indexed | 2024-03-08T09:28:06Z |
| format | Article |
| id | doaj.art-ab009f82fc174a22a14f30071f852c67 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-08T09:28:06Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-ab009f82fc174a22a14f30071f852c672024-01-31T05:44:26ZengElsevierJournal of Materials Research and Technology2238-78542024-01-012840404051Research on microstructure and mechanical properties of hot extruded Mg-Gd-Y-Sm-Zr alloy at room and high temperaturesRuitao Cheng0Lipeng Yan1Xiaoke Li2Zhen Feng3Guang Su4College of Material Science and Engineering, Henan Institute of Technology, Xinxiang, 453000, ChinaCollege of Material Science and Engineering, Henan Institute of Technology, Xinxiang, 453000, China; Corresponding author.Henan Key Laboratory of Mechanical Equipment Intelligent Manufacturing, School of Mechanical and Electrical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, ChinaCollege of Material Science and Engineering, Henan Institute of Technology, Xinxiang, 453000, ChinaCollege of Material Science and Engineering, Henan Institute of Technology, Xinxiang, 453000, China; Henan Provincial Engineering Research Center for Metallic Materials Modification Technology, Henan Institute of Technology, Xinxiang, 453000, ChinaIn this study, the age hardening behavior of hot extruded Mg-8Gd-4Y-1Sm-0.5Zr (GWS841) alloy, mechanical properties and microstructural evolution of hot extruded GWS841 alloy during elevated temperature tensile processes were mainly investigated. The results show that the hot extrusion aged GWS841 alloy possess excellent mechanical properties at room and high temperature, which are 397 MPa, 386 MPa, 376 MPa, and 312 MPa at 25 °C, 200 °C, 250 °C, and 300 °C, respectively. After aging for 200 °C × 96 h, the hot extruded GWS841 alloy reaches its maximum hardness and room temperature tensile strength, and strengthening precipitation phase, being nano β′ phase, approximately 12 nm × 20 nm in size, precipitates simultaneously in three prismatic planes, (1‾21‾0)α、 (1‾1‾20)α and (21‾1‾0)α planes, which present precipitation strengthening behavior. During tensile testing at 200 °C, the strengthening precipitate remains β′ phase. During elevated tensile processes at 250 °C and 300 °C, strengthening precipitation phase undergoes significant transformation at grain boundary, β′ phase → β phase, and additionally, nano precipitation zone formed by rare earth atoms aggregation along grain boundary, which strengthen the grain boundary. During elevated tensile deformation at 300 °C, β′ phase completely disappeared and transformed into nano rare earth atom cluster region uniformly distributing inner grain.http://www.sciencedirect.com/science/article/pii/S2238785423033513Magnesium alloyElevated temperature tensileGrain boundary strengtheningNano precipitate zonePhase transformation |
| spellingShingle | Ruitao Cheng Lipeng Yan Xiaoke Li Zhen Feng Guang Su Research on microstructure and mechanical properties of hot extruded Mg-Gd-Y-Sm-Zr alloy at room and high temperatures Journal of Materials Research and Technology Magnesium alloy Elevated temperature tensile Grain boundary strengthening Nano precipitate zone Phase transformation |
| title | Research on microstructure and mechanical properties of hot extruded Mg-Gd-Y-Sm-Zr alloy at room and high temperatures |
| title_full | Research on microstructure and mechanical properties of hot extruded Mg-Gd-Y-Sm-Zr alloy at room and high temperatures |
| title_fullStr | Research on microstructure and mechanical properties of hot extruded Mg-Gd-Y-Sm-Zr alloy at room and high temperatures |
| title_full_unstemmed | Research on microstructure and mechanical properties of hot extruded Mg-Gd-Y-Sm-Zr alloy at room and high temperatures |
| title_short | Research on microstructure and mechanical properties of hot extruded Mg-Gd-Y-Sm-Zr alloy at room and high temperatures |
| title_sort | research on microstructure and mechanical properties of hot extruded mg gd y sm zr alloy at room and high temperatures |
| topic | Magnesium alloy Elevated temperature tensile Grain boundary strengthening Nano precipitate zone Phase transformation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423033513 |
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