Characterization of hot deformation behavior of a biomedical titanium alloy TLM

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 598; pp. 236 - 243
• Main Authors: BAI, X. F, ZHAO, Y. Q, ZENG, W. D, JIA, Z. Q, ZHANG, Y. S
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier 26-03-2014
• Subjects: Applied sciences; Biocompatibility; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Cross-disciplinary physics: materials science; rheology; Deformation; Dynamic recrystallization; Elasticity. Plasticity; Exact sciences and technology; Flow stress; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Physics; Strain rate; Surgical implants; Titanium base alloys; Treatment of materials and its effects on microstructure and properties; Yield strength; Hot deformation; Titanium alloy; Temperature dependence; Dynamical recovery; Material processing; Plastic flow; Biomedical titanium alloy; Temperature effect; Mechanical properties; Dynamical recrystallization; Dynamic recrystallization; Compression test; Experimental result; Processing map; TLM; Instability; Hot compression; Flow stress; Strain rate
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2014.01.005

The hot deformation behavior of Ti-3Zr-2Sn-3Mo-25Nb (TLM) titanium alloy in the temperature range of 750-850 degree C and strain rate range of 0.001-1s-1 has been investigated by hot compressive testing on the Gleeble-3800 thermal and mechanical simulator. The experimental results show that the deformation temperature and the strain rate significantly affect the flow stress of TLM alloy during isothermal deformation. The flow stress increases with the decreasing of deformation temperature and increasing of strain rate. There is no instability domain of processing map at the temperature range from 750 to 850 degree C and strain rate range from 0.001 to 1s-1. The most peak efficiency domain appears at around deformation temperature of 850 degree C and the strain rate of 0.01s-1 with a peak efficiency of 36%. The mechanism in stability domain is dominated by dynamic recovery and dynamic recrystallization.