Physical Metallurgy Of Tungsten And Tungsten Base Alloys
Report Number: WADD TR 60-37 Part III
Author(s): Sell, Heinz G., Keith, George H., Koo, Ronald C., Schnitzel, Randolph H., Corth, Richard
Corporate Author(s): Westinghouse Electric Corp Bloomfield N J
Laboratory: Directorate of Materials and Processes
Date of Publication: 1962-11
Pages: 220
Contract: AF 33(616)-6933
DoD Project: 7351 - Metallic Materials
DoD Task: 735101
Identifier: AD0293841
Abstract:
The tensile properties of polycrystalline tungsten were investigated. Ductility decreased between 2000°F and 4000°F, and it was found that annealing temperature has a greater effect on the D.-B. transition temperature than does grain size.Single crystals with a [100] orientation were grown by electron beam floating zone melting. The tensile deformation behavior of these crystals was studied from -196°C to 800°C. Internal friction measurements were made on single crystals between 20°C and 600°C and it was attempted to correlate damping peaks found at about 300°C and 475°C with interstitial effects, carbon dosing experiments, and yield point phenomena. Single crystals were worked by rolling and their recrystallization response was investigated as a function of cold work and working temperature. Twin morphology was thoroughly studied. Binary solid solution alloy single crystals of W-Ta were produced by electron beam floating zone melting from compacted ingots. Alloy single crystals containing .25% and 4% tantalum were worked and the recrystallization response was determined to be 400°C to 600°C higher than that of worked pure tungsten single crystals.The tensile strength of sintered and swaged W-TaC alloys was determine at 3000°F and 3500°F as a function of alloy composition (0.1-1%). Also measured at 3000°F and 3500°F were the tensile strengths of the systems W-2%ThO2 and W-.5% HfO2..
Provenance: Lockheed Martin Missiles & Fire Control
Author(s): Sell, Heinz G., Keith, George H., Koo, Ronald C., Schnitzel, Randolph H., Corth, Richard
Corporate Author(s): Westinghouse Electric Corp Bloomfield N J
Laboratory: Directorate of Materials and Processes
Date of Publication: 1962-11
Pages: 220
Contract: AF 33(616)-6933
DoD Project: 7351 - Metallic Materials
DoD Task: 735101
Identifier: AD0293841
Abstract:
The tensile properties of polycrystalline tungsten were investigated. Ductility decreased between 2000°F and 4000°F, and it was found that annealing temperature has a greater effect on the D.-B. transition temperature than does grain size.Single crystals with a [100] orientation were grown by electron beam floating zone melting. The tensile deformation behavior of these crystals was studied from -196°C to 800°C. Internal friction measurements were made on single crystals between 20°C and 600°C and it was attempted to correlate damping peaks found at about 300°C and 475°C with interstitial effects, carbon dosing experiments, and yield point phenomena. Single crystals were worked by rolling and their recrystallization response was investigated as a function of cold work and working temperature. Twin morphology was thoroughly studied. Binary solid solution alloy single crystals of W-Ta were produced by electron beam floating zone melting from compacted ingots. Alloy single crystals containing .25% and 4% tantalum were worked and the recrystallization response was determined to be 400°C to 600°C higher than that of worked pure tungsten single crystals.The tensile strength of sintered and swaged W-TaC alloys was determine at 3000°F and 3500°F as a function of alloy composition (0.1-1%). Also measured at 3000°F and 3500°F were the tensile strengths of the systems W-2%ThO2 and W-.5% HfO2..
Provenance: Lockheed Martin Missiles & Fire Control