Microstructure and Mechanical Properties of Fiber Laser Welding of Aluminum Alloy with Beam Oscillation

Laser welding with beam oscillation is applied to join aluminum alloy plates in butt configuration. The effects of beam oscillating patterns on the quality of welds are compared and analyzed. The results indicate that beam oscillation can improve the weld formation and microstructure of butt joints. The circular oscillating weld has the features of fine grain and uniformly dispersed dendrites in the strengthening phase, and the porosity inhibitory effect of circular oscillation is the most obvious. In addition, beam oscillation has few effects on the tensile strength of welds, but exerts an influence on the elongation of welds.

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Laser absorption in high-power fiber laser welding of stainless steel and aluminum alloy

10.2351/1.5061337 ◽

2008 ◽

Author(s):

Naoyuki Matsumoto ◽

Yousuke Kawahito ◽

Masami Mizutani ◽

Seiji Katayama

Keyword(s):

Stainless Steel ◽

Aluminum Alloy ◽

Laser Welding ◽

Fiber Laser ◽

High Power ◽

Fiber Laser Welding ◽

Laser Absorption

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Dissimilar unbeveled butt joints of AA6061 to S235 structural steel by means of standard single beam fiber laser welding-brazing

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2020.116994 ◽

2021 ◽

Vol 291 ◽

pp. 116994

Author(s):

D. Wallerstein ◽

F. Lusquiños ◽

R. Comesaña ◽

J. del Val ◽

A. Riveiro ◽

...

Keyword(s):

Laser Welding ◽

Fiber Laser ◽

Structural Steel ◽

Fiber Laser Welding ◽

Butt Joints ◽

Single Beam

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Dissimilar Metals Laser Welding between DP1000 Steel and Aluminum Alloy 1050

Metals ◽

10.3390/met9010102 ◽

2019 ◽

Vol 9 (1) ◽

pp. 102 ◽

Cited By ~ 8

Author(s):

António Pereira ◽

Ana Cabrinha ◽

Fábio Rocha ◽

Pedro Marques ◽

Fábio Fernandes ◽

...

Keyword(s):

Aluminum Alloy ◽

Laser Welding ◽

Mechanical Tests ◽

Welding Parameters ◽

Dissimilar Metals ◽

Butt Welding ◽

Electron Microscopes ◽

1050 Aluminum Alloy ◽

Scanning Electron Microscopes

The welding of dissimilar metals was carried out using a pulsed Nd: YAG laser to join DP1000 steel and an aluminum alloy 1050 H111. Two sheets of each metal, with 30 × 14 × 1 mm3, were lap welded, since butt welding proved to be nearly impossible due to the huge thermal conductivity differences and melting temperature differences of these materials. The aim of this research was to find the optimal laser welding parameters based on the mechanical and microstructure investigations. Thus, the welded samples were then subjected to tensile testing to evaluate the quality of the joining operation. The best set of welding parameters was replicated, and the welding joint obtained using these proper parameters was carefully analyzed using optical and scanning electron microscopes. Despite the predicted difficulties of welding two distinct metals, good quality welded joints were achieved. Additionally, some samples performed satisfactorily well in the mechanical tests, reaching tensile strengths close to the original 1050 aluminum alloy.

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