Effect of grain size on tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with grain boundary segregation of Mg
Mg is easily segregated to the grain boundary of the Al–Mg alloy, which affects the mechanical properties of the alloy. In order to reveal the role of Mg element at grain boundaries in Al–Mg alloys, molecular dynamics simulation was used to study the tensile deformation behavior of nano-polycrystall...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424025584 |
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| _version_ | 1846107740217278464 |
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| author | Jianjun Chen Runxia Li Biao Wang Gang Liu |
| author_facet | Jianjun Chen Runxia Li Biao Wang Gang Liu |
| author_sort | Jianjun Chen |
| collection | DOAJ |
| description | Mg is easily segregated to the grain boundary of the Al–Mg alloy, which affects the mechanical properties of the alloy. In order to reveal the role of Mg element at grain boundaries in Al–Mg alloys, molecular dynamics simulation was used to study the tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with different grain sizes. The results show that the elastic modulus and tensile strength of Al and Al–Mg alloys have a clear grain size dependence. The critical grain size at which the elastic modulus decreases as the grain size decreases is independent of Mg. As the Mg content increases to 3 at. %, the critical grain size for the transition from the Hall-Petch relationship to the inverse Hall-Petch relationship increases. The appropriate content of Mg segregation at the grain boundary can increase the elastic modulus, strength and plasticity of the alloy, and inhibit the grain boundary cracking. This result provides important theoretical support for the composition design and microstructure regulation of high-performance Al–Mg alloys. |
| format | Article |
| id | doaj-art-d02b2bf707b74c9087dddb06f2bc1fcd |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-d02b2bf707b74c9087dddb06f2bc1fcd2024-12-26T08:55:19ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013363286339Effect of grain size on tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with grain boundary segregation of MgJianjun Chen0Runxia Li1Biao Wang2Gang Liu3Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China; Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan, 523803, China; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, ChinaResearch Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China; Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan, 523803, China; Corresponding author. Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China.Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China; Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan, 523803, China; Corresponding author. Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan, 523803, China.State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China; Corresponding author.Mg is easily segregated to the grain boundary of the Al–Mg alloy, which affects the mechanical properties of the alloy. In order to reveal the role of Mg element at grain boundaries in Al–Mg alloys, molecular dynamics simulation was used to study the tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with different grain sizes. The results show that the elastic modulus and tensile strength of Al and Al–Mg alloys have a clear grain size dependence. The critical grain size at which the elastic modulus decreases as the grain size decreases is independent of Mg. As the Mg content increases to 3 at. %, the critical grain size for the transition from the Hall-Petch relationship to the inverse Hall-Petch relationship increases. The appropriate content of Mg segregation at the grain boundary can increase the elastic modulus, strength and plasticity of the alloy, and inhibit the grain boundary cracking. This result provides important theoretical support for the composition design and microstructure regulation of high-performance Al–Mg alloys.http://www.sciencedirect.com/science/article/pii/S2238785424025584Al–Mg alloyGrain boundary segregationDeformation mechanismGrain sizeMechanical properties |
| spellingShingle | Jianjun Chen Runxia Li Biao Wang Gang Liu Effect of grain size on tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with grain boundary segregation of Mg Journal of Materials Research and Technology Al–Mg alloy Grain boundary segregation Deformation mechanism Grain size Mechanical properties |
| title | Effect of grain size on tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with grain boundary segregation of Mg |
| title_full | Effect of grain size on tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with grain boundary segregation of Mg |
| title_fullStr | Effect of grain size on tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with grain boundary segregation of Mg |
| title_full_unstemmed | Effect of grain size on tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with grain boundary segregation of Mg |
| title_short | Effect of grain size on tensile deformation behavior of nano-polycrystalline Al and Al–Mg alloys with grain boundary segregation of Mg |
| title_sort | effect of grain size on tensile deformation behavior of nano polycrystalline al and al mg alloys with grain boundary segregation of mg |
| topic | Al–Mg alloy Grain boundary segregation Deformation mechanism Grain size Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424025584 |
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