The presence of H2O vapour in an oxidizing environment can increase the critical aluminium concentration, NAl ∗ , required to establish a passivating Al2O3 scale in multicomponent alumina-forming alloys. This work used AlxFeyNi1-x-y composition spread alloy film combinatorial libraries to determine NAl ∗ (x, y) continuously across AlxFeyNi1-x-y composition space (x = 0 → 1, y = 0 → [1-x]) in a ...

This paper describes the process of developing a model that relates the shear stresses in a gas welded aluminium alloy weldment with the corresponding flux constituent elements that make up the flux composition. This model, considering the initial composition ranges, from where 13 flux compositions were formulated and their shear stresses determined and transformed into a model. This model was ...

The surface tension of detached liquid drops in pulsed gas metal arc welding was determined in situ from the period of the prolate–oblate oscillations initiated by the detachment event. The oscillating drops were imaged by an optical shadowgraph technique utilizing laser illumination. Images obtained during the welding process were recorded with a high-speed video camera and stored for subseque...