Vacuum Brazing of Dissimilar Al 7075 and Al–25 Si Alloy
The vacuum brazing of dissimilar Al 7075 and Al–25 Si alloy was investigated. The brazing filler was copper foil with a thickness of 20 μm, and the brazing temperature was 560 °C held for 10 min. The average shear strength of the brazed joint of dissimilar Al 7075 and Al–25 Si alloy was 26.4 MPa. Th...
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MDPI AG
2022-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/6/1042 |
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| author | Dashuang Liu Ping Wei Weimin Long Wei Zhou |
| author_facet | Dashuang Liu Ping Wei Weimin Long Wei Zhou |
| author_sort | Dashuang Liu |
| collection | DOAJ |
| description | The vacuum brazing of dissimilar Al 7075 and Al–25 Si alloy was investigated. The brazing filler was copper foil with a thickness of 20 μm, and the brazing temperature was 560 °C held for 10 min. The average shear strength of the brazed joint of dissimilar Al 7075 and Al–25 Si alloy was 26.4 MPa. The copper layer was found to be dissolved completely, and the interface of the joint had an irregular shape with a serrated border, indicating a good metallurgical bonding between the two dissimilar alloys. However, factors which might cause deterioration of the shear strength were also observed, including the formation of the intermetallic compounds such as MgZn<sub>2</sub>, Cu<sub>2</sub>Al and Mg<sub>2</sub>Si, the existence of voids and microcracks, the coarsening of grains in Al 7075, and the coarsening of primary Si in Al–25 Si alloy. |
| first_indexed | 2024-03-09T23:03:14Z |
| format | Article |
| id | doaj.art-aa1cc5e84d4848c6aa29024df9492c7b |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T23:03:14Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-aa1cc5e84d4848c6aa29024df9492c7b2023-11-23T17:59:19ZengMDPI AGMetals2075-47012022-06-01126104210.3390/met12061042Vacuum Brazing of Dissimilar Al 7075 and Al–25 Si AlloyDashuang Liu0Ping Wei1Weimin Long2Wei Zhou3School of Material Science and Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaZhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001, ChinaSchool of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, SingaporeThe vacuum brazing of dissimilar Al 7075 and Al–25 Si alloy was investigated. The brazing filler was copper foil with a thickness of 20 μm, and the brazing temperature was 560 °C held for 10 min. The average shear strength of the brazed joint of dissimilar Al 7075 and Al–25 Si alloy was 26.4 MPa. The copper layer was found to be dissolved completely, and the interface of the joint had an irregular shape with a serrated border, indicating a good metallurgical bonding between the two dissimilar alloys. However, factors which might cause deterioration of the shear strength were also observed, including the formation of the intermetallic compounds such as MgZn<sub>2</sub>, Cu<sub>2</sub>Al and Mg<sub>2</sub>Si, the existence of voids and microcracks, the coarsening of grains in Al 7075, and the coarsening of primary Si in Al–25 Si alloy.https://www.mdpi.com/2075-4701/12/6/1042vacuum brazingshear strengthAl 7075Al–25 Si alloymicrostructure |
| spellingShingle | Dashuang Liu Ping Wei Weimin Long Wei Zhou Vacuum Brazing of Dissimilar Al 7075 and Al–25 Si Alloy Metals vacuum brazing shear strength Al 7075 Al–25 Si alloy microstructure |
| title | Vacuum Brazing of Dissimilar Al 7075 and Al–25 Si Alloy |
| title_full | Vacuum Brazing of Dissimilar Al 7075 and Al–25 Si Alloy |
| title_fullStr | Vacuum Brazing of Dissimilar Al 7075 and Al–25 Si Alloy |
| title_full_unstemmed | Vacuum Brazing of Dissimilar Al 7075 and Al–25 Si Alloy |
| title_short | Vacuum Brazing of Dissimilar Al 7075 and Al–25 Si Alloy |
| title_sort | vacuum brazing of dissimilar al 7075 and al 25 si alloy |
| topic | vacuum brazing shear strength Al 7075 Al–25 Si alloy microstructure |
| url | https://www.mdpi.com/2075-4701/12/6/1042 |
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