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- Title
Study on explosive welding A7075 and Ti–6Al–4 V with aluminum or copper interlayer.
- Authors
Liang, Guofeng; Huang, Jiawen; Zhou, Dapeng; Hu, Jianian; Li, Kebin; Zhu, Guichun; Liu, Zhongshu; Chen, Xiang
- Abstract
Direct explosion welding makes it challenging to weld high-strength metals. Interlayer explosive welding was utilized to join the high-strength, low-melting-point aluminum alloy A7075 with the high-strength titanium alloy Ti–6Al–4 V. This method overcomes the challenges of directly welding such metals and widens the range of weldable parameters, thus facilitating more favorable welding conditions. The study effectively demonstrated the interlayer explosive welding process for A7075 with Ti–6Al–4 V using aluminum and copper interlayers. Microstructure and chemical content analysis of the bonded interfaces were conducted through optical microscope, scanning electron microscope, electron backscatter diffraction, and X-ray energy spectroscopy. The investigations found that the upper interfaces were flat and straight in shape, but the lower interfaces were wavy. Interdiffusion of components and compound formation occurred at the welded interface. In addition, grain refining took place at the bonding interface. Vickers hardness was used to measure hardness variations at the welded interface, and the mechanical properties of the bonded interface were examined using tensile shear, bending, and microtensile tests. The results confirm the practicality of interlayer explosive welding in producing high-strength, low-melting-point composites of A7075 and Ti–6Al–4 V. Microstructure analysis and mechanical testing at the weld interfaces of A7075/A1060/Ti–6Al–4 V and A7075/Cu/Ti–6Al–4 V composite plates revealed excellent bonding quality. Notably, compared to A7075/A1060/Ti–6Al–4 V composite plate, A7075/Cu/Ti–6Al–4 V composite plate performs better in mechanical tests, with tensile bending strengths of 137 MPa and 1321 MPa, respectively. Thinner interfacial melting zones were evident in the microstructure of the composite plate with a copper interlayer at the 30 mm explosive thickness parameter, correlating with improved performance in the microtensile test.
- Subjects
EXPLOSIVE welding; COPPER plating; COMPOSITE plates; ANALYTICAL chemistry; SCANNING electron microscopes
- Publication
Journal of Materials Science, 2024, Vol 59, Issue 33, p15883
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-024-10122-8