Numerical And Experimental Comparison Of VIGA And EIGA Systems For Nickel-Based Alloy Gas Atomization

Authors: Baraa Qaddah (IRT M2P, France) Widad Ayadh (IRT M2P, France) Raphael Durand (IRT M2P, France) Nathan Liebgott (IRT M2P, France) Meher Zaied (IRT M2P, France) Emmanuel De La Rochefoucauld (IRT M2P, France) Pierre Chapelle (IJL, France) Bernard Dussoubs (IJL, France) Abstract: At the IRT M2P Uckange site, both Vacuum Induction Melting Gas Atomization (VIGA) and Electrode Induction Melting Gas Atomization (EIGA) systems are operated to manufacture high-quality spherical powders. This study presents a comparative analysis combining numerical simulations and experimental investigations of nickel-based alloy powders produced by VIGA and EIGA under identical inlet gas pressure conditions.Numerical results highlight significant differences in jet structure and flow behavior arising from distinct nozzle geometries and gas feeding strategies. The VIGA configuration generates a stable, axisymmetric supersonic jet with higher centerline Mach numbers, promoting finer particle formation. Conversely, the EIGA system induces a swirling flow that enhances melt suction and atomization initiation, but produces a broader and less focused jet. Experimental findings corroborate these trends, showing that VIGA powders exhibit smaller particle sizes, while EIGA powders demonstrate improved roundness and sphericity. This comparison covers particle size distribution, morphology, flowability and chemical composition of powders. DOI: https://doi.org/10.59499/EP267157608