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Advanced Gas Atomization Processing for Ti and Ti Alloy Powder Manufacturing

TitleAdvanced Gas Atomization Processing for Ti and Ti Alloy Powder Manufacturing
Publication TypeJournal Article
Year of Publication2010
AuthorsHeidloff AJ, Rieken JR, Anderson IE, Byrd D, Sears J, Glynn M, Ward RM
Journal TitleJom
Volume62
Pages35-41
Date Published05/01
ISBN Number1047-4838
Accession NumberISI:000277539500008
Keywordstitanium
Abstract

A multi-layer ceramic composite melt pour tube for superheating and pouring of molten Ti-6Al-4V (wt.%) was tested using an existing Ti atomization system. Free fall gas atomization was conducted with the pour tube while liquid metal temperatures were measured in situ using a two-color optical pyrometer. Post-process pour tube erosion was compared with preprocess matching surfaces, and minimal change in interior liner thickness was found. Microstructural analysis. phase identification, and composition determination of the resulting gas-atomized powder indicated minimal contamination from the composite pour tube despite very high liquid superheat, approaching 300 degrees C. Hot isostatic pressing of the powder resulted in mechanical properties exceeding the MIL-T-9047 standard for Ti-6Al-4V
URL<Go to ISI>://000277539500008