Additive manufacturing technologies based on melting and solidification have considerable
similarities with fusion-based welding technologies, either by electric arc or high-power …

Vibration assisted welding (VAW) has emerged as a successful replacement for heat
treatments and post-weld vibration treatments of arc welds to reduce residual stresses and …

One of the less desirable aspects of fusion-based additive manufacturing is the propensity
for coarse columnar grain structures crossing build layers to form. This paper initially …

Laser oscillating welding method was employed to welding of Invar alloy so as to achieve
grain refinement and decrease internal defects. Effects of frequency and amplitude of beam …

Grain refining can improve the mechanical properties and solidification-cracking resistance
of the weld. Ultrasonic grain refining was conducted by dipping an ultrasonic probe in the …

Grain refining is known to improve the solidification-cracking resistance and mechanical
properties of welds. Mg alloys are increasingly used for vehicle weight reduction. The …

Evolution of microstructure during keyhole mode welding involves several special features
such as multiple inflections of weld pool boundary curvatures, strong spatially variable …

The newly developed aluminum–lithium alloy 2A97 was for the first time joined by laser
beam welding in order to meet the ever-increased long-term requirements of aerospace …

Abstract In this work, 1460 Al-Li alloy plates (thickness 2 mm) were butt-welded by using
conventional variable polarity TIG welding (VPTIG), low-frequency pulsed (2 Hz) variable …

Enhancement in the mechanical properties of AA2219 Al-6.3 Cu (wt.%) alloy arc-welded
joints is a guarantee for an excellent service reliability of large aerospace components. This …