[1] [1] FROEND M, FOMIN F, RIEKEHR S, et al. Fiber laser welding of dissimilar titanium (Ti-6Al-4V/cp-Ti) T-joints and their laser forming process for aircraft application［J］. Optics & Laser Technology, 2017, 96: 123-131.

[3] [3] XU W F, ZHANG Z L. Microstructure and mechanical properties of laser beam welded TC4/TA15 dissimilar joints［J］. Transactions of Nonferrous Metals Society of China, 2016, 26(12): 3135-3146.

[4] [4] SUN Z C, YANG H. Microstructure and mechanical properties of TA15 titanium alloy under multi-step local loading forming［J］. Materials Science and Engineering: A, 2009, 523(1-2): 184-192.

[6] [6] ZHANG H, HU S S, SHEN J Q, et al. Effect of laser beam offset on microstructure and mechanical properties of pulsed laser welded BTi-6431S/TA15 dissimilar titanium alloys［J］. Optics & Laser Technology, 2015, 74: 158-166.

[7] [7] LIU L M, HAO X F, DU X. Microstructure characteristics and mechanical properties of laser-TIG hybrid welding joint of TA15 titanium alloy［J］. Materials Research Innovations, 2008, 12(3): 114-118.

[8] [8] DUAN A Q, GONG S L. The influence of the type and pressure of shielding gas on the porosity formation for CO2 laser welding of TA15［J］. Advanced Materials Research, 2013, 753-755: 372-378.

[10] [10] LI D L, HU S S, SHEN J Q, et al. Microstructure and mechanical properties of laser-welded joints of Ti-22Al-25Nb/TA15 dissimilar titanium alloys［J］. Journal ofMaterials Engineering and Performance, 2016, 25(5): 1880-1888.