Khodabakhshi, Farzad and L. H., Shah and Gerlich, Adrian (2019) Dissimilar laser welding of an AA6022-AZ31 lap-joint by using Ni-interlayer: novel beam-wobbling technique, processing parameters, and metallurgical characterization. Optics & Laser Technology, 112. pp. 349-362. ISSN 0030-3992. (Published)
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(Khodabakhshi, 2019) Dissimilar laser welding of an AA6022-AZ31 lap-joint by using Ni-interlayer Novel beam-wobbling technique, processing parameters, and metallurgical characterization.pdf Restricted to Repository staff only Download (34MB) | Request a copy |
Abstract
In this article, the weldability of dissimilar lap joints between 2 mm thick sheets of AA6022 aluminum (bottom) and AZ31 magnesium alloys (upper) was studied using a fiber laser with a wobbling scanner. The effects of laser beam wobbling parameters, laser power, traveling speed, and the presence of a pure nickel interlayer (∼0.1 mm thickness) is evaluated based on the microstructures and phases produced. The experimental results revealed dissimilar joint formation is highly dependent on inter-mixing, as well as fusion zone dimensions which control Al- and Mg-rich interaction zones that vary with laser power. Sound dissimilar joints were only produced by penetrating the Mg-rich interaction zone into the aluminum alloy. Joint formation benefited from suppression of Al-Mg chemical reactions using a Ni-interlayer, providing more well-dispersed and more benign phases compared to Al-Mg intermetallics at the interface during welding. The application of laser beam wobbling on a circular path with diameter of ∼0.4 mm and frequency of 1000 Hz served to reduce cracks and enhanced materials intermixing.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by SCOPUS |
| Uncontrolled Keywords: | AA6022 aluminum alloy; AZ31 magnesium alloy; Beam wobbling; Dissimilar laser joining; Ni-interlayer; Processing parameters |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TN Mining engineering. Metallurgy |
| Faculty/Division: | Faculty of Mechanical Engineering |
| Depositing User: | Mr. Luqman Hakim Ahmad Shah |
| Date Deposited: | 22 Feb 2019 04:25 |
| Last Modified: | 22 Feb 2019 04:25 |
| URI: | http://umpir.ump.edu.my/id/eprint/23244 |
| Download Statistic: | View Download Statistics |
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