Deformation mechanism diagram and deformation instability of a Mo–Re alloy during the hot compression

This study investigates the hot compression behavior of a molybdenum- Rhenium (Mo–Re) alloy, focusing on deformation mechanisms and instability. Utilizing electron backscattered diffraction (EBSD) and transmission electron microscope (TEM), we characterized the microstructure, grain orientation, and deformation behavior across temperatures (650, 750, 850, and 950 °C) and strain rates (0.01, 0.1, 1, and 10s-1). The study reveals that Mo–Re alloys exhibit high hot deformation resistance, necessitating optimal processing conditions for effective plastic deformation. Key findings by EBSD and TEM include the formation of dislocation networks and substructures enhancing grain plasticity. We established a constitutive equation and processing maps, providing valuable insights for industrial applications and future alloy development.