Abstract

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.

© 2014 Optical Society of America

Picosecond laser welding of similar and dissimilar materials

Richard M. Carter, Jianyong Chen, Jonathan D. Shephard, Robert R. Thomson, and Duncan P. Hand
Appl. Opt. 53(19) 4233-4238 (2014)

Direct welding of glass and metal by 1  kHz femtosecond laser pulses

Guodong Zhang and Guanghua Cheng
Appl. Opt. 54(30) 8957-8961 (2015)

High-quality welding of glass by a femtosecond laser assisted with silver nanofilm

Cong Wang, Shifu Zhang, Zhi Luo, Kaiwen Ding, Bo Liu, and Ji’an Duan
Appl. Opt. 60(18) 5360-5364 (2021)

Welding of PMMA by a femtosecond fiber laser

Annalisa Volpe, Francesca Di Niso, Caterina Gaudiuso, Andrea De Rosa, Rebeca Martínez Vázquez, Antonio Ancona, Pietro Mario Lugarà, and Roberto Osellame
Opt. Express 23(4) 4114-4124 (2015)

Ultrashort pulsed fiber laser welding and sealing of transparent materials

Huan Huang, Lih-Mei Yang, and Jian Liu
Appl. Opt. 51(15) 2979-2986 (2012)