Unexpected high-temperature brittleness of a Mg-Gd-Y-Ag alloy
Rare earth (RE) can produce excellent precipitation hardening in Mg alloys. However, when forming a solid solution, it also deteriorates formability, a problem that can usually be overcome by raising deformation temperature. Here we report an unexpected observation of high temperature brittleness in...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2022-09-01
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| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956721001638 |
| _version_ | 1797995955154321408 |
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| author | Lirong Xiao Xuefei Chen Huiyan Ning Ping Jiang Yi Liu Bin Chen Dongdi Yin Hao Zhou Yuntian Zhu |
| author_facet | Lirong Xiao Xuefei Chen Huiyan Ning Ping Jiang Yi Liu Bin Chen Dongdi Yin Hao Zhou Yuntian Zhu |
| author_sort | Lirong Xiao |
| collection | DOAJ |
| description | Rare earth (RE) can produce excellent precipitation hardening in Mg alloys. However, when forming a solid solution, it also deteriorates formability, a problem that can usually be overcome by raising deformation temperature. Here we report an unexpected observation of high temperature brittleness in a Mg-Gd-Y-Ag alloy. As the temperature reached 500 °C, the formability decreased drastically, leading to severe intergranular fracture under only 0.5% strain. This was caused by failure of grain boundaries, which are weakened by segregated interfacial compounds. |
| first_indexed | 2024-04-11T10:08:40Z |
| format | Article |
| id | doaj.art-bc84f2a7c23a411abadc06b720ad0be4 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-11T10:08:40Z |
| publishDate | 2022-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-bc84f2a7c23a411abadc06b720ad0be42022-12-22T04:30:09ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672022-09-0110925102515Unexpected high-temperature brittleness of a Mg-Gd-Y-Ag alloyLirong Xiao0Xuefei Chen1Huiyan Ning2Ping Jiang3Yi Liu4Bin Chen5Dongdi Yin6Hao Zhou7Yuntian Zhu8Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaNano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Mechanical and Electrical Engineering, Heilongjiang Institute of Technology, Harbin 150050, ChinaState Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, ChinaNano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaThermoFisher Scientific, Shanghai 201210, ChinaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; Corresponding authors.Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Corresponding authors.Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong 999077, ChinaRare earth (RE) can produce excellent precipitation hardening in Mg alloys. However, when forming a solid solution, it also deteriorates formability, a problem that can usually be overcome by raising deformation temperature. Here we report an unexpected observation of high temperature brittleness in a Mg-Gd-Y-Ag alloy. As the temperature reached 500 °C, the formability decreased drastically, leading to severe intergranular fracture under only 0.5% strain. This was caused by failure of grain boundaries, which are weakened by segregated interfacial compounds.http://www.sciencedirect.com/science/article/pii/S2213956721001638Interfacial compoundsFormabilityHigh temperature brittlenessGrain boundary sliding |
| spellingShingle | Lirong Xiao Xuefei Chen Huiyan Ning Ping Jiang Yi Liu Bin Chen Dongdi Yin Hao Zhou Yuntian Zhu Unexpected high-temperature brittleness of a Mg-Gd-Y-Ag alloy Journal of Magnesium and Alloys Interfacial compounds Formability High temperature brittleness Grain boundary sliding |
| title | Unexpected high-temperature brittleness of a Mg-Gd-Y-Ag alloy |
| title_full | Unexpected high-temperature brittleness of a Mg-Gd-Y-Ag alloy |
| title_fullStr | Unexpected high-temperature brittleness of a Mg-Gd-Y-Ag alloy |
| title_full_unstemmed | Unexpected high-temperature brittleness of a Mg-Gd-Y-Ag alloy |
| title_short | Unexpected high-temperature brittleness of a Mg-Gd-Y-Ag alloy |
| title_sort | unexpected high temperature brittleness of a mg gd y ag alloy |
| topic | Interfacial compounds Formability High temperature brittleness Grain boundary sliding |
| url | http://www.sciencedirect.com/science/article/pii/S2213956721001638 |
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