In situ fabrication of spherical oxide dispersion strengthened Ti powder through gas atomization

• DOI: 10.1016/j.jmrt.2023.05.097
• Publication Date: 2023-05-13T06:21:29Z
• Authors: Hyeon-Tae Im; Woo Jin Kim; Nam-Seok Kim; Dae Ha Kim; Chang-Soo Park; Kwangsuk Park; Young Do Kim; Hyung-Ki Park
• Keywords: Ingot; Vacuum induction melting; Powder Metallurgy; Titanium powder

Oxide dispersion strengthened (ODS) alloys exhibit excellent mechanical properties due to fine oxide dispersion, but they have great limitations utilizing powder fabrication via alloying. Therefore, this study examined the alloy composition and process that can fabricate ODS titanium (Ti) in situ through a gas atomization method. The content of oxide, which dissolve molten Ti during melting precipitate inside powders cooling atomization, were derived thermodynamic calculations. + 1 wt% yttria (Y2O3) was derived, prepared as an electrode induction (EIGA) First, rod-shaped ingots vacuum arc remelting (VAR), Y2O3 coarsely precipitated along grain boundaries slow rate. Then, fabricated by EIGA using rod ingot spherical could be continuously fabricated. cross-section microstructure observed, particles with several tens nm uniformly distributed powder. These calculations experiments confirmed