Enhancing the joint of dissimilar aluminum alloys through MIG welding approach assisted by ultrasonic frequency pulse

•UFP was used to aid the Metal inert gas welding of AlSi10MgMn die cast aluminum alloy and 6061 aluminum alloy.•The joint hydrogen porosity and pore size were decreased under the effect of UFP.•The tensile strength of the joint welded with UFP increased by 85%.•UFP promoted the formation of “escapab...

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Bibliographic Details
Published in:Materials letters 2023-01, Vol.330, p.133289, Article 133289
Main Authors: Ye, Maocheng, Wang, Zeyu, Butt, Hassaan Ahmad, Yang, Mengying, Chen, Hao, Han, Ke, Cui, Mengyue, Lei, Yucheng
Format: Article
Language:English
Subjects:
Defects
Die cast aluminum alloy
Tensile strength
Ultrasonic frequency pulse
Welding
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Summary:•UFP was used to aid the Metal inert gas welding of AlSi10MgMn die cast aluminum alloy and 6061 aluminum alloy.•The joint hydrogen porosity and pore size were decreased under the effect of UFP.•The tensile strength of the joint welded with UFP increased by 85%.•UFP promoted the formation of “escapable” large H bubbles, aiding their expulsion. In this work, AlSi10MgMn die cast aluminum alloy and 6061 aluminum alloys were bonded using Metal inert gas (MIG) welding assisted by ultrasonic frequency pulse (UFP). The effect of UFP on the weld shape, joint porosity, microstructure and mechanical properties of the joints was investigated. Results revealed a distinct decrease in joint hydrogen porosity defects and pore size via the UFP-MIG welding approach in comparison to a directly bonded joint. This method resulted in the tensile strength of the joint reaching 185% of the joint bonded without UFP. The regulating mechanism of UFP on the joint porosity was determined.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2022.133289