S. Pandya, N. Munroe, C. Pulletikurthi, W. Haider, Florida International University, Miami, FL; P. K. S. Gill, Florida International University, miami, FL
Approximately half a million patients undergo total Hip Arthroplasty (THA) each year in the U.S. One historical issue involving THA has been wear and fatigue failure. Additional issues affecting THA include the restriction of motion and instability within the joints, which could lead to hip dislocation. The alloys currently used for hip replacement face issues of stability, wear resistance and bone sparing characteristics. It has been demonstrated that some alloys prepared by powdered metallurgy followed by hot isostatic pressing (PM HIP) have similar or even better mechanical properties than those prepared by Arc Melting (AM). In this investigation, the mechanical properties of Ti-Ta alloys prepared by PM HIP and AM were compared. A numerical investigation of fatigue crack growth rates and stress corrosion cracking resistance of the alloys are also presented.
Summary: Approximately half a million patients undergo total Hip Arthroplasty (THA) each year in the U.S. One historical issue involving THA has been wear and fatigue failure. Additional issues affecting THA include the restriction of motion and instability within the joints, which could lead to hip dislocation. The alloys currently used for hip replacement face issues of stability, wear resistance and bone sparing characteristics. It has been demonstrated that some alloys prepared by powdered metallurgy followed by hot isostatic pressing (PM HIP) have similar or even better mechanical properties than those prepared by Arc Melting (AM). In this investigation, the mechanical properties of Ti-Ta alloys prepared by PM HIP and AM were compared. A numerical investigation of fatigue crack growth rates and stress corrosion cracking resistance of the alloys are also presented.
