Investigation of microstructure and tensile properties of as-processed TZM alloy at elevated temperature

Abstract

The high-temperature tensile properties and microstructures of as-processed (forged and rolled) TZM alloy were studied during thermoplastic deformation by uniaxial tensile tests at different annealing temperatures (850–1450 °C). The recrystallization phenomenon observed for rolled TZM alloy about 1300 °C and forged TZM alloy about 1400 °C. The forged state as an example, the annealing forged TZM alloy performed cup-shaped fracture by SEM being stretched at 1600 °C and studying the initiation, aggregation and growth of micropores during the fracture process were performed. ODF map was used to accurately prove the orientation distribution density in any orientation of forged TZM alloy space after annealing. The activation of the forged TZM alloy sliding system was related to the structure of the material, the deformation method and the force direction. Meanwhile, the high-resolution Electron backscatter diffraction (EBSD) technique was used to study thermoplastic deformation behavior and microstructure evolution of forged TZM alloy under different annealing temperatures in Channel5 software, getting a deeper deformation mechanism of forged TZM alloy during thermal deformation.