Journal ArticleDOI
Effect of zinc coatings on joint properties and interfacial reactions in aluminum to steel ultrasonic spot welding
TLDR
In this paper, the weldability of different zinc-coated steels with aluminum is discussed, using a 2.5kW ultrasonic spot welding welder, and the results show that soft hot-dipped zinc (DX56-Z)-coated steel results in better weld performance than hard (galv-annealed) zinc coatings (DX53-ZF).Abstract:
Dissimilar joining of aluminum to steel sheet in multimaterial automotive structures is an important potential application of ultrasonic spot welding (USW). Here, the weldability of different zinc-coated steels with aluminum is discussed, using a 2.5-kW USW welder. Results show that soft hot-dipped zinc (DX56-Z)-coated steel results in better weld performance than hard (galv-annealed) zinc coatings (DX53-ZF). For Al to hard galv-annealed-coated steel welds, lap shear strengths reached a maximum of ~80% of the strength of an Al-Al joint after a 1.0 s welding time. In comparison, welds between Al6111-T4 and hot dipped soft zinc-coated steel took longer to achieve the same maximum strength, but nearly matched the Al-Al joint properties. The reasons for these different behaviors are discussed in terms of the interfacial reactions between the weld members.read more
Citations
More filters
Journal ArticleDOI
Effect of ultrasonic welding parameters on microstructure and mechanical properties of dissimilar joints
Muhammad Shakil,Muhammad Shakil,Naeem ul Haq Tariq,M. Ahmad,M. A. Choudhary,Javed Akhter,S. Suresh Babu +6 more
TL;DR: In this article, an optimization of ultrasonic spot welding parameters for joining 3003 Aluminum alloy with 304 Stainless steel was performed at various clamping pressures and energy levels for investigating its effect on microstructure, mechanical properties and bond quality of the weld.
Journal ArticleDOI
Mechanism of weld formation during very-high-power ultrasonic additive manufacturing of Al alloy 6061
TL;DR: In this paper, the microstructures of Al alloy 6061 subjected to very high-power ultrasonic additive manufacturing were systematically examined to understand the underlying ultrasonic welding mechanism, and it was found that the weld interface between the metal tapes consisted of fine, equiaxed grains resulting from recrystallization, which was driven by simple shear deformation along the ultrasonically vibrating direction of the tape surface.
Journal ArticleDOI
Microstructure and mechanical properties of CP-Ti/X65 bimetallic sheets fabricated by explosive welding and hot rolling
TL;DR: The microstructure and alloy element distribution across the TA1/X65 interfaces of as-welded, heat treated and extruded TA 1/X 65 bimetallic sheets were studied and compared as discussed by the authors.
Journal ArticleDOI
Microstructure and lap shear strength of the weld interface in ultrasonic welding of Al alloy to stainless steel
TL;DR: The welds with weld energies of more than 1.05 kJ fracture in the base metal and were severely deformed by the ultrasonic vibration, and recrystallization occurred around the weld interface owing to the shear deformation and heating during ultrasonic welding as discussed by the authors.
Journal ArticleDOI
Interfacial microstructure evolution and weld formation during ultrasonic welding of Al alloy to Cu
TL;DR: In this article, an anodized Al alloy 1050 was also welded to Cu and a recrystallized microstructure with shear texture was formed in the Al matrix.
References
More filters
Journal ArticleDOI
The metallurgy of zinc-coated steel
TL;DR: In this article, a review of the metallurgy of zinc-coated steel from a scientific standpoint to develop relationships to practical applications is presented. And the effect of the microstructures of these coatings on the important properties of corrosion, formability, weldability and paintability is discussed.
Journal ArticleDOI
Mechanisms of joint and microstructure formation in high power ultrasonic spot welding 6111 aluminium automotive sheet
D. Bakavos,Philip B. Prangnell +1 more
TL;DR: In this article, the authors used X-ray tomography, high resolution SEM, and EBSD, and dissimilar alloy welds to track the interface position and characterise the stages of weld formation, and microstructure evolution, as a function of welding energy.
Journal ArticleDOI
Joining techniques for aluminium spaceframes used in automobiles: Part I — solid and liquid phase welding
T.A. Barnes,Ian R. Pashby +1 more
TL;DR: In this article, solid and liquid-state welding techniques, including the conventional automotive method of spot-welding, in the context of their applicability to aluminium spaceframe structures are reviewed not only in terms of the physical properties of the joint produced, but also with due consideration to production issues pertinent to the automotive industry.
Journal ArticleDOI
Enhanced diffusion and phase transformations during ultrasonic welding of zinc and aluminum
TL;DR: In this article, an EDS analysis yielded an interdiffusivity value of 1.9μm2/s, attributed to high strain rate (∼103−s−1) plastic deformation in aluminum, which may increase the instantaneous vacancy concentration as high as ∼10−1.
Journal ArticleDOI
Temperature and stress distribution in ultrasonic metal welding—An FEA-based study
TL;DR: In this article, a finite element model is presented to predict the interface temperature and stress distribution during welding and their influences in the work piece, sonotrode and anvil, including the effect of clamping forces, material thickness and coefficient of friction during heat generation at the weld interface.
Related Papers (5)
Ultrasonic spot welding of aluminium to steel for automotive applications—microstructure and optimisation
Mechanisms of joint and microstructure formation in high power ultrasonic spot welding 6111 aluminium automotive sheet
D. Bakavos,Philip B. Prangnell +1 more