Influence of welding parameters on lap joint between Al and Ti alloys using low power fiber laser

Fiber laser beam welding has always been a user‐friendly and flexible method to join dissimilar materials despite differences in thermal coefficient. Many industrial applications such as automotive has replaced the conventional joining methods towards this because of the flexibility and reduction in...

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Bibliographic Details
Published inMaterialwissenschaft und Werkstofftechnik Vol. 50; no. 3; pp. 346 - 352
Main Authors Janasekaran, S., Lemon, S.M.B., Yusof, F.
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 01.03.2019
Subjects
AA2024
Aluminum base alloys
Automobile industry
Automotive engineering
Dissimilar material joining
Dissimilar materials
Faser
Ferrous metals
fiber
Fiber lasers
geringe Leistung
Heat affected zone
Industrial applications
lap joint
Lap joints
Laser beam welding
Lasers
Liquid bridges
low power
Melting
Morphology
Optical microscopy
Ti6Al4 V
Titanium alloys
Titanium base alloys
Weight reduction
Welding parameters
Überlappverbindung
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Summary:Fiber laser beam welding has always been a user‐friendly and flexible method to join dissimilar materials despite differences in thermal coefficient. Many industrial applications such as automotive has replaced the conventional joining methods towards this because of the flexibility and reduction in time consumption. In the present study, dissimilar titanium alloy; Ti6Al4 V and aluminum alloy; AA2024‐0 were laser welded through a lap joint technique using a low power Yb‐fiber laser without any additional filler. The influence of welding speed on weld morphology was investigated using optical microscopy (OM) and scanning electron microscope (SEM). The cross‐section of the joints revealed that the fusion zone (FZ) and heat affected zones (HAZ) are wider when welding speed decreases with lower laser power. This result shows that the low power fiber laser has sufficient energy to melt the base materials, forming a liquid bridge to facilitate the smooth flow of molten metal between the top and bottom layer. Therefore, at lower welding speeds with constant low laser power, it was shown that there are possibilities of laser welding between two non‐ferrous metals.
ISSN:0933-5137
1521-4052
DOI:10.1002/mawe.201800207