Mechanical Performances of Biomedical Beta-type Titanium Alloy through Heat Treatment and Severe Plastic Deformation

AKAHORI T., NIINOMI M., NAKAI M., Yilmazer H., FUKUI H., TODAKA Y.

Materials and Processes for Medical Devices Conference, Minnesota, United States Of America, 8 - 10 August 2011, pp.27-30 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Minnesota
  • Country: United States Of America
  • Page Numbers: pp.27-30
  • Yıldız Technical University Affiliated: No

Abstract

The tensile strengths of TNTZ after solution treatment (TNTZ(ST)) or after cold rolling (TNTZ(CR)) decrease with an increase in the aging temperature, although the elongation shows the reverse trend. The fatigue limits of TNTZ(CR) subjected to aging at 673 K and 723 K are nearly equal to that of Ti-6Al-4V ELI, which has around 800 MPa. The tensile strength of TNTZ(CR) is improved drastically through high pressure torsion (HPT), which is one of severe deformation processes (SDP), and shows more than 1 GPa, although the fatigue strength is not improved by HPT because of the work-softening during the cyclic deformation.