Hot cracking sensitivity of 2A14 high strength aluminum alloy in fiber laser welding

Wei Wang; Chengjun Jiang; Jian Huang; Yaobang Zhao; Peipei Hu

doi:10.1117/12.2602362

24 June 2021 Hot cracking sensitivity of 2A14 high strength aluminum alloy in fiber laser welding

Wei Wang, Chengjun Jiang, Jian Huang, Yaobang Zhao, Peipei Hu

Proceedings Volume 11885, International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021); 1188507 (2021) https://doi.org/10.1117/12.2602362
Event: 2021 International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021), 2021, Xi'an, China

Abstract

It is a known fact that 2A14 aluminum alloy is susceptible to cracking in the weld metal when welded with fusion processes. Hot cracking sensitivity of 2A14 aluminum alloy in fiber laser welding is first evaluated experimentally. The cracking behaviors of the specimens are evaluated by fishbone cracking test. The fracture morphologies of the weld are observed by optical microscope (OM) and scanning electron microscope (SEM). The results show that the crack formed in fiber laser welding with filler wire of 2A14 aluminum alloy is solidification crack. There is an obvious laser power threshold to form thermal cracks in different welding speeds. Hot cracking tendency is obvious when the laser power is below the threshold. There is no hot cracking when the laser power is greater than or equal to the threshold. The hot cracking rate of the welding speed 3.0m/min is slightly higher than the welding speed 4.5m/min.

Citation Download Citation

Wei Wang, Chengjun Jiang, Jian Huang, Yaobang Zhao, and Peipei Hu "Hot cracking sensitivity of 2A14 high strength aluminum alloy in fiber laser welding", Proc. SPIE 11885, International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021), 1188507 (24 June 2021); https://doi.org/10.1117/12.2602362

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