Heterogeneous dynamic restoration of Ti–15Mo alloy during hot compression

• DOI: 10.1016/j.jmrt.2024.11.089
• Publication Date: 2024-11-10T23:23:12Z
• Authors: Esmaeil Shahryari; Maria Cecilia Pol...; Dalibor Preisler; Petr Harcuba; Josef Stráský; Miloš Janeček; Fernando Gustavo ...
• Keywords: Condensed Matter - Materials Science; Mining engineering. Metallurgy; EBSD; TN1-997; Materials Science (cond-mat.mtrl-sci); FOS: Physical sciences; Dynamic recrystallization; Ti-15Mo; Subgrain formation; Dynamic recovery; Strain hardening

Near-beta titanium alloys have shown low Young's modulus and good strength, making them excellent implant candidates. However, their processing using thermomechanical routes in single phase beta region results heterogeneous microstructures due to high content alloying elements consequent slow diffusion-controlled processes such as dynamic recovery. This study investigates the deformation behaviour of a Ti-15Mo alloy through hot compression experiments Gleeble 3800 device domain at strain rates from 0.01 s-1 10 s-1, reaching final strains 0.50 0.85 followed by immediate water quench. The findings show that material presents rate sensitivity. flow curves significant hardening before steady-state regime, particularly rates. exponent calculations support effect molybdenum on retarding softening mechanisms Electron backscatter diffraction (EBSD) measurements deformed samples revealed recovery is primary restoration mechanism, with continuous geometric recrystallisation evidence. Due process, we observe subgrain formation for different parameters. Therefore, introduced an EBSD-based method quantify size. We concluded decrease increases minimal variation higher