Effects of alloying on mechanical properties of Ta were studied. Both dispersion-strengthened and solid-solution strengthened Ta alloys exhibit high-strength at elevated temperatures while maintaining good fabricability and excellent low-temperature ductility. Strength data to 1650 C (3000 F) are reported. The oxidation resistance of Ta can be improved severalfold by alloying. Several alloying elements were found effective in reducing scaling and contamination up to 1400 C (2550 F). (Author).

Fabrication results, bend ductility, tensile properties at low and high temperaure, hightemperature stress-rupture data, welding studies, metallurgical studies (both recrystallization behavior and heat treatment), and oxidation behavior of tantalum and tantalum-base alloys are presented. Several tantalum-base alloys were found to have outstanding trength properties at temperatures to 1925 C (3500 F), combined in many cases with excellent room-temperature ductility. Particularly outstanding in this respect are alloys in the system Ta-Mo-W. (Author).