INTERMEDIATE-TEMPERATURE DUCTILITY AND STRENGTH OF TUNGSTEN AND MOLYBDENUM TZM
Final rept. 1 Jul 1964-30 Aug 1965
BATTELLE MEMORIAL INST COLUMBUS OH
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The ductility and strength of tungsten and molybdenum TZM have been studied as a function of temperature with emphasis on investigating the effects of strain rate, structural condition, and carbon content on mechanical properties. Both wrought-stress-relieved and recrystallized tungsten and Mo-TZM have been tested at strain rates of 0.01, 2, and 600 per min. over the temperature range -200 to 1850 C. In recrystallized Mo-TZM alloys, an intermediate-temperature region about 1100-1500 C of reduced ductility at the two lower strain rates was found to be caused by pronounced grain-boundary cracking. This phenomenon is associated with dynamic strengthening of the matrix as a result of precipitation during deformation.
- Properties of Metals and Alloys