1. Determination of the weldability and elevated temperature stability of refractory metal alloys. II-Long-time elevated temperature stability of refractory metal alloys;Lessman;NASA CR-1608,1970
2. Role of Hf and Zr in the hydrogen-embrittlement of Ta and Cb alloys;Stephens,1974
3. Effect of aging at 1040°C (1900°F) on the ductility and structure of a tantalum alloy, T-111;Watson;NASA TN D-6988,1972
4. Effects of alloy composition in alleviating embrittlement problems associated with the tantalum alloy T-111;Stephens;NASA TN D-7838,1975