Effect of graphene on microstructure and mechanical properties of cast AZ91 alloy
Grain refinement plays an important role to enhance the mechanical properties of magnesium alloys. In this work，graphene-reinforced AZ91 composites were successfully prepared by pre-dispersion combined with gravity casting method. The microstructure of the GNP/AZ91 composites was characterized using...
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Journal of Aeronautical Materials
2024-12-01
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| Series: | Journal of Aeronautical Materials |
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| Online Access: | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000053 |
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| author | WANG Dianjun LIANG Ying |
| author_facet | WANG Dianjun LIANG Ying |
| author_sort | WANG Dianjun |
| collection | DOAJ |
| description | Grain refinement plays an important role to enhance the mechanical properties of magnesium alloys. In this work，graphene-reinforced AZ91 composites were successfully prepared by pre-dispersion combined with gravity casting method. The microstructure of the GNP/AZ91 composites was characterized using OM，SEM，TEM，etc. The results show that the grain size of AZ91 alloy gradually decreases with the increase of GNP content. When 1% GNP is added， the grain size of AZ91 alloy is reduced from 415 μm to 86 μm，with the refinement efficiency of 79%. It is found and revealed through TEM observation that the refining mechanism of GNP on AZ91 alloy is mainly Al4C3 phase obtained by in-situ reaction of GNP with Al element in AZ91 melt， which can promote the heterogeneous nucleation of α-Mg grains， thus achieving significant grain refinement effect. When the GNP content is increased to 0.5%， the best mechanical properties are obtained for AZ91 alloy with the UTS， YS and EL reaching 150， 96 MPa and 2.1%，the improvement of 34%， 32% and 91% respectively compared to AZ91 alloy. |
| format | Article |
| id | doaj-art-f70a400d909b40a9aee14b4c25b2ee73 |
| institution | Kabale University |
| issn | 1005-5053 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj-art-f70a400d909b40a9aee14b4c25b2ee732024-12-09T02:42:59ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50532024-12-01446263210.11868/j.issn.1005-5053.2023.0000532023-0053Effect of graphene on microstructure and mechanical properties of cast AZ91 alloyWANG Dianjun0LIANG Ying1Modern Manufacturing Engineering Institute，Heilongjiang Institute of Technology，Jixi 158100，Heilongjiang，ChinaLibrary，Heilongjiang Institute of Technology，Jixi 158100，Heilongjiang，ChinaGrain refinement plays an important role to enhance the mechanical properties of magnesium alloys. In this work，graphene-reinforced AZ91 composites were successfully prepared by pre-dispersion combined with gravity casting method. The microstructure of the GNP/AZ91 composites was characterized using OM，SEM，TEM，etc. The results show that the grain size of AZ91 alloy gradually decreases with the increase of GNP content. When 1% GNP is added， the grain size of AZ91 alloy is reduced from 415 μm to 86 μm，with the refinement efficiency of 79%. It is found and revealed through TEM observation that the refining mechanism of GNP on AZ91 alloy is mainly Al4C3 phase obtained by in-situ reaction of GNP with Al element in AZ91 melt， which can promote the heterogeneous nucleation of α-Mg grains， thus achieving significant grain refinement effect. When the GNP content is increased to 0.5%， the best mechanical properties are obtained for AZ91 alloy with the UTS， YS and EL reaching 150， 96 MPa and 2.1%，the improvement of 34%， 32% and 91% respectively compared to AZ91 alloy.http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000053grain sizeaz91 alloymechanical propertiesgrain refinement |
| spellingShingle | WANG Dianjun LIANG Ying Effect of graphene on microstructure and mechanical properties of cast AZ91 alloy Journal of Aeronautical Materials grain size az91 alloy mechanical properties grain refinement |
| title | Effect of graphene on microstructure and mechanical properties of cast AZ91 alloy |
| title_full | Effect of graphene on microstructure and mechanical properties of cast AZ91 alloy |
| title_fullStr | Effect of graphene on microstructure and mechanical properties of cast AZ91 alloy |
| title_full_unstemmed | Effect of graphene on microstructure and mechanical properties of cast AZ91 alloy |
| title_short | Effect of graphene on microstructure and mechanical properties of cast AZ91 alloy |
| title_sort | effect of graphene on microstructure and mechanical properties of cast az91 alloy |
| topic | grain size az91 alloy mechanical properties grain refinement |
| url | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2023.000053 |
| work_keys_str_mv | AT wangdianjun effectofgrapheneonmicrostructureandmechanicalpropertiesofcastaz91alloy AT liangying effectofgrapheneonmicrostructureandmechanicalpropertiesofcastaz91alloy |