| MATERIALS AND SUSTAINABLE DEVELOPMENT:GREEN MANUFACTURING AND PROCESSING OF MATERIALS |
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| Microstructure and Mechanical Property of Arc-assisted Laser Welding-brazing Butt Joint of Aluminum and Steel |
| YU Xiaoquan1, FAN Ding1,2, HUANG Jiankang1,2, LI Chunling1
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1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050
2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050 |
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Abstract Using arc-assisted laser welding-brazing method, an aluminum alloy was joined to steel in a butt configuration. The composition and distribution of microstructure in different zones of the joint were analyzed, and the mechanical properties of the weld joint were tested. The effect factors of tensile mechanical properties and the fracture behavior of the joint were discussed. The results show that, according to the formation of weld joint, the welding-brazing butt joint can be divided into fusion zone, wetting-spreading zone and interface zone. The joint is mainly composed of α-Al columnar crystal microstructure and Al-Fe intermetallic compound. According to the fracture location, the fracture of the joint can be divided into two typical modes: the fracture in the fusion zone, which caused by the segregation of grain boundary, and the fracture at the Al/steel interface zone caused by the intermetallic compounds.
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Published: 02 July 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51465031), the Program of Innovation Groups of Basic Research of Gansu Province (17JR5RA107), the Foundation of Collaborative Innovation Teams in College of Gansu Province (2017C-07). |
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2019, Vol. 33 
