Consolidation of Beta III Titanium Alloy Spherical Metal Powders by Hot Swaging.

The Air Force Materials Laboratory Tube Swaging Method was utilized for determining the processing parameters for producing fully consolidated products from Beta III titanium alloy spherical powders. Four temperatures 732 C, 760 C, 871 C and 954 C and four percentage reductions 25.1, 37.5, 54.2, and 65.2 of the tube outside diameter were selected to study the consolidation effects of processing parameters. Fully consolidated powder products were obtained by 54.2 and 65.2 percent reductions at all four temperatures and by 37.5 percent reduction at 954 C. The other processing conditions did not give fully dense products. Room temperature tensile and fracture toughness properties of the swaged powder products in the heat treated conditions were determined. The fully consolidated swaged powder products had tensile and fracture toughness properties equal to or better than reported properties of wrought products made from ingot Beta III titanium alloy. The properties of the other swaged powder products not fully dense reflected lower mechanical properties because of poor consolidation. Author