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Critical assessment: dissimilar resistance spot welding of aluminium/steel: challenges and opportunities
, Article Materials Science and Technology (United Kingdom) ; Volume 33, Issue 15 , 2017 , Pages 1705-1712 ; 02670836 (ISSN) ; Sharif University of Technology
Abstract
Dissimilar joining of aluminium and steel, especially using resistance spot welding as a critical process in vehicle manufacturing, is a key challenge for multi-materials lightweight design strategy. Controlling the formation and growth of Al5Fe2 intermetallic is the outstanding issue for producing high strength crash-resistance Al/steel dissimilar resistance spot welds. This critical assessment highlights the current understating regarding factors affecting the joint properties and approaches to control the interfacial reaction. Finally, the unresolved scientific challenges are discussed with the goal of shedding light on the path forward to produce reliable metallurgical bonding between...
Resistance Spot Welding of 5xxx Aluminum Alloy to Aluminum Clad Steel Sheet
, M.Sc. Thesis Sharif University of Technology ; Movahedi, Mojtaba (Supervisor)
Abstract
Due to the growing trends in application of aluminum alloys for automotive body production, the need for development of successful dissimilar joints between steels and aluminum alloys is growing too. The main process for joining these metals in automotive industry is resistance spot welding (RSW). However, there are some challenges in RSW of the aluminum to steel such as different physical properties of two metals, formation of brittle Al/Fe intermetallic compounds (IMCs) and presence of porosities at the weld interface which adversely affect the weld properties. In order to overcome these limitations, several methods have been proposed. Al interlayer is one of these methods. The use of the...
Mechanical characteristics improvement of spot-welded dissimilar steels in different thickness
, Article Proc. of the Int. Conf. on Advances in Welding Science and Technology for Construction, Energy and Transportation, AWST 2010, held in Conj. with the 63rd Annual Assembly of IIW 2010, 11 July 2010 through 17 July 2010, Istanbul ; 2010 , Pages 803-810 ; 9786056141911 (ISBN) ; Kokabi, A. H ; Adineh, A ; Mansourzadeh, S. A ; Ghasemzadeh, H ; Ardakani, R. T ; Sharif University of Technology
2010
Abstract
Resistance spot welding of dissimilar materials especially in different thickness is generally more challenging than that of similar materials due to differences in the physical, chemical and mechanical properties of the base metals. And also when the part is under static and dynamic forces the health of spot-welds is crucial. Hence, the influence of welding parameters such as current, time, applied force and hold time on the shear-tensile load has been investigated in this study. Moreover, in this research the case study is one of the most important body parts of the vehicle which is front wheel house, and effect of above-mentioned parameter on the strength of spot-welds has been...