[1] BIRO E, WECKMAN D C, ZHOU Y. Pulsed Nd:YAG laser welding of copper using oxygenated assist gases[J]. Metallurgical & Materials Transactions, 2002, A33(7):2019-2030.
[2] HESS A, WEBER R, HEIDER A, et al. Forced deep-penetration welding with low-power second-harmonic assistance of CW copper welding with 1μm wavelength[J]. Physics Procedia, 2010, B5:29-36.
[3] ZHANG L J, ZHANG G F, NING J, et al. Microstructure and pro-perties of the laser butt welded 1.5mm thick T2 copper joint achieved at high welding speed[J]. Materials & Design, 2015, 88:720-736.
[4] HESS A, SCHUSTER R, HEIDER A, et al. Continuous wave laser welding of copper with combined beams at wavelengths of 1030nm and of 515nm[J]. Physics Procedia, 2011, A12:88-94.
[5] HEIDER A, STRITT P, HESS A, et al. Process stabilization at welding copper by laser power modulation[J]. Physics Procedia, 2011, A12:81-87.
[6] JIAO J K, WANG F Y, SUN J Q, et al. Study on copper surface pre-treating and welding with fiber lasers[J]. Laser & Optoelectronics Progress, 2016, 53(3):031409(in Chinese).
[7] WU X H, XIANG F W, LIU Y, et al. Study on laser welding of co-pper[J]. Applied Laser, 2013, 33(2):169-172(in Chinese). doi: 10.3788/AL
[8] HEIDER A, SOLLINGER J, ABT F, et al. High-speed X-ray analysis of spatter formation in laser welding of copper[J]. Physics Procedia, 2013, 41:112-118. doi: 10.1016/j.phpro.2013.03.058
[9] QIN G L, LIN Sh Y. Radial dimension of keyhole and its dynamic characteristics in laser deep penetration welding[J].Chinese Journal of Lasers, 2005, 32(4):557-561(in Chinese).
[10] ZUO T Ch. Laser materials processing of high strength aluminum alloys[M]. Beijing:National Defense Industry Press, 2002:74(in Chinese).
[11] WANG J Ch, WANG X Zh, HUI S X. Research of linear heat input and laser focus position for laser welding HE130 titanium alloy[J].Chinese Journal of Lasers, 2003, 30(2):179-184(in Chinese).
[12] QIANG H L, CHENG Zh G, LUO J T, et al. Influencing factors on topography of weld in deep penetration laser welding[J].Acta Optica Sinica, 1999, 19(9):1289-1295(in Chinese).
[13] LU L, SHEN Y F, CHEN X H, et al. Ultrahigh strength and high electrical conductivity in copper[J]. Science, 2004, 304(5669):422-426. doi: 10.1126/science.1092905
[14] CALLISTER W D, RETHWISCH D G. Materials science and engineeringan introduction[M]. NewYork, USA:Wiley, 2000:736.
[15] XUE P, XIAO B L, ZHANG Q, et al. Achieving friction stir welded pure copper joints with nearly equal strength to the parent metal via additional rapid cooling[J]. Scripta Materialia, 2011, 64(11):1051-1054. doi: 10.1016/j.scriptamat.2011.02.019