Microstructure and mechanical properties of a novel Al–Mg–Er–Zr-Sc alloy fabricated by selective laser melting
In this work, Er–Zr-Sc modified Al–Mg alloy, manufactured by selective laser melting, offers excellent mechanical properties, due to the formation of a desirable microstructure and the synergistic effects of multiple strengthening mechanisms. The microstructure in as-built and aged alloys have been...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423028764 |
| _version_ | 1827346050595160064 |
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| author | Zhengjiang Gao Teng Ma Hui Li Huan Yang Wu Wei Hui Huang Zuoren Nie |
| author_facet | Zhengjiang Gao Teng Ma Hui Li Huan Yang Wu Wei Hui Huang Zuoren Nie |
| author_sort | Zhengjiang Gao |
| collection | DOAJ |
| description | In this work, Er–Zr-Sc modified Al–Mg alloy, manufactured by selective laser melting, offers excellent mechanical properties, due to the formation of a desirable microstructure and the synergistic effects of multiple strengthening mechanisms. The microstructure in as-built and aged alloys have been characterized by scanning electron microscopy and transmission electron microscopy. The results show that the microstructure of alloy is composed of equiaxed grains (∼0.7 μm in diameter) along the boundary of molten pool and columnar grains (∼1.46 μm in width) inside the molten pool. Al3(Sc,Zr) particles serve as nucleation sites to promote the nucleation of equiaxed grains, and Al3(Er,M) eutectic phases and other compounds at the grain boundaries inhibit grain growth, both of which greatly refine the grains and bring significant grain boundary strengthening and Orowan strengthening effect. During the aging process, coherent Al3(Er,Zr,Sc) nano-precipitates are dispersedly precipitated from the Al matrix, which plays a key role in improving the mechanical properties of the aged alloy, and then the alloy reaches a yield strength of 530 MPa, a tensile strength of up to 542 MPa, and an elongation of over 12 %. Under the combined addition of Er, Sc, and Zr, and the influence of multi-element interaction, the alloy has high-density secondary phases and extremely fine grains, which are the main sources of reinforcement. |
| first_indexed | 2024-03-07T23:22:34Z |
| format | Article |
| id | doaj.art-30ffbd31ac56490284d9cfb36b77bb85 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:22:34Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-30ffbd31ac56490284d9cfb36b77bb852024-02-21T05:27:56ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012768806891Microstructure and mechanical properties of a novel Al–Mg–Er–Zr-Sc alloy fabricated by selective laser meltingZhengjiang Gao0Teng Ma1Hui Li2Huan Yang3Wu Wei4Hui Huang5Zuoren Nie6Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, China; Avimetal AM Tech Co., Ltd., Beijing 100176, ChinaAvimetal AM Tech Co., Ltd., Beijing 100176, ChinaAvimetal AM Tech Co., Ltd., Beijing 100176, ChinaAvimetal AM Tech Co., Ltd., Beijing 100176, ChinaKey Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, China; Corresponding author.Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, ChinaKey Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, ChinaIn this work, Er–Zr-Sc modified Al–Mg alloy, manufactured by selective laser melting, offers excellent mechanical properties, due to the formation of a desirable microstructure and the synergistic effects of multiple strengthening mechanisms. The microstructure in as-built and aged alloys have been characterized by scanning electron microscopy and transmission electron microscopy. The results show that the microstructure of alloy is composed of equiaxed grains (∼0.7 μm in diameter) along the boundary of molten pool and columnar grains (∼1.46 μm in width) inside the molten pool. Al3(Sc,Zr) particles serve as nucleation sites to promote the nucleation of equiaxed grains, and Al3(Er,M) eutectic phases and other compounds at the grain boundaries inhibit grain growth, both of which greatly refine the grains and bring significant grain boundary strengthening and Orowan strengthening effect. During the aging process, coherent Al3(Er,Zr,Sc) nano-precipitates are dispersedly precipitated from the Al matrix, which plays a key role in improving the mechanical properties of the aged alloy, and then the alloy reaches a yield strength of 530 MPa, a tensile strength of up to 542 MPa, and an elongation of over 12 %. Under the combined addition of Er, Sc, and Zr, and the influence of multi-element interaction, the alloy has high-density secondary phases and extremely fine grains, which are the main sources of reinforcement.http://www.sciencedirect.com/science/article/pii/S2238785423028764elective laser meltingAl–Mg alloyEr–Zr-Sc modificationAdditive manufacturingHigh-strength aluminum alloy |
| spellingShingle | Zhengjiang Gao Teng Ma Hui Li Huan Yang Wu Wei Hui Huang Zuoren Nie Microstructure and mechanical properties of a novel Al–Mg–Er–Zr-Sc alloy fabricated by selective laser melting Journal of Materials Research and Technology elective laser melting Al–Mg alloy Er–Zr-Sc modification Additive manufacturing High-strength aluminum alloy |
| title | Microstructure and mechanical properties of a novel Al–Mg–Er–Zr-Sc alloy fabricated by selective laser melting |
| title_full | Microstructure and mechanical properties of a novel Al–Mg–Er–Zr-Sc alloy fabricated by selective laser melting |
| title_fullStr | Microstructure and mechanical properties of a novel Al–Mg–Er–Zr-Sc alloy fabricated by selective laser melting |
| title_full_unstemmed | Microstructure and mechanical properties of a novel Al–Mg–Er–Zr-Sc alloy fabricated by selective laser melting |
| title_short | Microstructure and mechanical properties of a novel Al–Mg–Er–Zr-Sc alloy fabricated by selective laser melting |
| title_sort | microstructure and mechanical properties of a novel al mg er zr sc alloy fabricated by selective laser melting |
| topic | elective laser melting Al–Mg alloy Er–Zr-Sc modification Additive manufacturing High-strength aluminum alloy |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423028764 |
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