Abstract
Abstract Joining aluminum alloy sheets is increasingly important in manufacturing. Traditional welding techniques create a heat-affected zone (HAZ) around the joint; however, solid-state joining methods such as impact welding produce joints without significant heat. Here, electrically vaporized foil actuators (VFA) provided the high-pressure pulses needed for impact welding. 0.96 mm thick AA6061-T6 and 0.76 mm thick AA5052 were joined in lap and spotlike configurations, at a variety of impact velocities. The welds failed in coach-peel outside the joint interface. The 5052 hardened within 100 μm of the interface. The 6061-T6 may have softened slightly within 50 μm of the interface.
Highlights
Aluminum alloys combine low density and corrosion resistance with good mechanical properties after metallurgical strengthening mechanisms are applied
The evolution of a flyer sheet’s velocity over the distance it traveled was calculated by integrating the velocity–time histories produced by photonic Doppler velocimetry (PDV)
That work showed that the both measured flyer velocity and the energy deposited into a given mass of foil approach a maximum limit as the charging energy increases for a particular resistive, inductive, capacitive (RLC) system
Summary
Aluminum alloys combine low density and corrosion resistance with good mechanical properties after metallurgical strengthening mechanisms are applied. Traditional fusion welding (via shielded metal arc welding, gas metal arc welding, or gas tungsten arc welding) and resistance spot welding produce a HAZ around the weld area [4]. Recent advanced techniques, such as cold metal transfer joining, reduce heat input, but do not eliminate the HAZ [5]. In age-hardened Al alloys like 6061-T6, heat from welding can lead to overaging of the alloy, causing a loss of material strength [4]. In work-hardened alloys like 5052, strength is reduced by annealing of the material. Materials become more susceptible to failure in the HAZ around the weld
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
