Elimination of cracks in Al–Zn–Mg–Cu alloy by addition of TiO2 in selective laser melting
7050 aluminium alloy is widely used in aerospace industry due to its excellent mechanical properties. 7050 aluminium alloy belongs to Al–Zn–Mg–Cu alloy. Due to the formation of cracks in selective laser melting (SLM) forming of Al–Zn–Mg–Cu alloys, 7050 aluminium alloy is difficult to be applied to f...
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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/S2238785424022518 |
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| author | Biao Huang Hongqun Tang Jun Cao Jincheng Huang Fei Peng Xu Zheng Kezhun He Qizhong Zhao |
| author_facet | Biao Huang Hongqun Tang Jun Cao Jincheng Huang Fei Peng Xu Zheng Kezhun He Qizhong Zhao |
| author_sort | Biao Huang |
| collection | DOAJ |
| description | 7050 aluminium alloy is widely used in aerospace industry due to its excellent mechanical properties. 7050 aluminium alloy belongs to Al–Zn–Mg–Cu alloy. Due to the formation of cracks in selective laser melting (SLM) forming of Al–Zn–Mg–Cu alloys, 7050 aluminium alloy is difficult to be applied to forming and manufacturing in this technological field. In order to solve this critical problem, in this paper, titanium dioxide (TiO2) powder was mixed with 7050 aluminium alloy using ball milling method to achieve the effect of eliminating cracks. The cracks in the specimens completely disappeared when the TiO2 additions were 1.5 wt% and 2 wt%. With the addition of TiO2, the grains gradually changed from coarse columnar crystals to fine equiaxed crystals. Combined with the temperature field simulation, the grain refinement and crack elimination mechanism of TiO2 in SLM forming were analysed. The grain refinement is attributed to the formation of Al3Ti. The crack elimination was attributed to the reduction of the intergranular solid-liquid channel length. The maximum values of tensile strength and elongation of 7050 aluminium alloy formed by SLM are achieved at 2 wt% of TiO2. The values are 389 MPa and 8.8 %. The better mechanical properties were attributed to the synergistic effect of crack elimination, Hall-Petch, and Orowan strengthening. This study provides experimental guidance for the preparation of crack-free 7050 aluminium alloy. |
| format | Article |
| id | doaj-art-9811ea32a9b64c4ba72c7b4adb061e9c |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-9811ea32a9b64c4ba72c7b4adb061e9c2025-08-20T02:39:15ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01333068307910.1016/j.jmrt.2024.09.246Elimination of cracks in Al–Zn–Mg–Cu alloy by addition of TiO2 in selective laser meltingBiao Huang0Hongqun Tang1Jun Cao2Jincheng Huang3Fei Peng4Xu Zheng5Kezhun He6Qizhong Zhao7State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China; Key Laboratory of High Performance Structural Materials and Thermo-surface Processing (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China; Key Laboratory of High Performance Structural Materials and Thermo-surface Processing (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China; Corresponding author. State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China.State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China; Key Laboratory of High Performance Structural Materials and Thermo-surface Processing (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China; Key Laboratory of High Performance Structural Materials and Thermo-surface Processing (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China; ALG Aluminiumlnc., Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys, Nanning, 530031, PR China; Corresponding author. State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China.State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China; ALG Aluminiumlnc., Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys, Nanning, 530031, PR ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China; ALG Aluminiumlnc., Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys, Nanning, 530031, PR ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, 530004, PR China; ALG Aluminiumlnc., Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys, Nanning, 530031, PR China7050 aluminium alloy is widely used in aerospace industry due to its excellent mechanical properties. 7050 aluminium alloy belongs to Al–Zn–Mg–Cu alloy. Due to the formation of cracks in selective laser melting (SLM) forming of Al–Zn–Mg–Cu alloys, 7050 aluminium alloy is difficult to be applied to forming and manufacturing in this technological field. In order to solve this critical problem, in this paper, titanium dioxide (TiO2) powder was mixed with 7050 aluminium alloy using ball milling method to achieve the effect of eliminating cracks. The cracks in the specimens completely disappeared when the TiO2 additions were 1.5 wt% and 2 wt%. With the addition of TiO2, the grains gradually changed from coarse columnar crystals to fine equiaxed crystals. Combined with the temperature field simulation, the grain refinement and crack elimination mechanism of TiO2 in SLM forming were analysed. The grain refinement is attributed to the formation of Al3Ti. The crack elimination was attributed to the reduction of the intergranular solid-liquid channel length. The maximum values of tensile strength and elongation of 7050 aluminium alloy formed by SLM are achieved at 2 wt% of TiO2. The values are 389 MPa and 8.8 %. The better mechanical properties were attributed to the synergistic effect of crack elimination, Hall-Petch, and Orowan strengthening. This study provides experimental guidance for the preparation of crack-free 7050 aluminium alloy.http://www.sciencedirect.com/science/article/pii/S2238785424022518Selective laser melting (SLM)7050 aluminium alloyTiO2CrackingMechanical properties |
| spellingShingle | Biao Huang Hongqun Tang Jun Cao Jincheng Huang Fei Peng Xu Zheng Kezhun He Qizhong Zhao Elimination of cracks in Al–Zn–Mg–Cu alloy by addition of TiO2 in selective laser melting Journal of Materials Research and Technology Selective laser melting (SLM) 7050 aluminium alloy TiO2 Cracking Mechanical properties |
| title | Elimination of cracks in Al–Zn–Mg–Cu alloy by addition of TiO2 in selective laser melting |
| title_full | Elimination of cracks in Al–Zn–Mg–Cu alloy by addition of TiO2 in selective laser melting |
| title_fullStr | Elimination of cracks in Al–Zn–Mg–Cu alloy by addition of TiO2 in selective laser melting |
| title_full_unstemmed | Elimination of cracks in Al–Zn–Mg–Cu alloy by addition of TiO2 in selective laser melting |
| title_short | Elimination of cracks in Al–Zn–Mg–Cu alloy by addition of TiO2 in selective laser melting |
| title_sort | elimination of cracks in al zn mg cu alloy by addition of tio2 in selective laser melting |
| topic | Selective laser melting (SLM) 7050 aluminium alloy TiO2 Cracking Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424022518 |
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