Huang Huan, Yang Lih-Mei, Bai Shuang, Liu Jian
Appl Opt. 2014 Oct 1;53(28):6569-78. doi: 10.1364/AO.53.006569.
In this paper, welding of dissimilar metals was demonstrated for the first time, to the best of our knowledge, by using a high-energy high-repetition-rate femtosecond fiber laser. Metallurgical and mechanical properties were investigated and analyzed under various processing parameters (pulse energy, repetition rate, and welding speed). Results showed that the formation of intermetallic brittle phases and welding defects could be effectively reduced. Strong welding quality with more than 210 MPa tensile strength for stainless steel-aluminum and 175 MPa tensile strength for stainless steel-magnesium has been demonstrated. A minimal heat affected zone and uniform and homogenous phase transformation in the welding region have been demonstrated. This laser-welding technique can be extended for various applications in semiconductor, automobile, aerospace, and biomedical industries.
据我们所知，本文首次展示了使用高能量高重复频率飞秒光纤激光器进行异种金属焊接。研究并分析了在各种加工参数（脉冲能量、重复频率和焊接速度）下的冶金和机械性能。结果表明，金属间脆性相的形成和焊接缺陷可得到有效减少。已证明不锈钢-铝焊接的抗拉强度超过210MPa，不锈钢-镁焊接的抗拉强度超过175MPa，焊接质量良好。已证明焊接区域的热影响区最小，且相变均匀。这种激光焊接技术可扩展用于半导体、汽车、航空航天和生物医学行业的各种应用。
