SEDL / STP / STP1272-EB / STP16072S

Optimization of Properties of Ti-15Mo-2.8Nb-3Al-0.2Si & Ti-15Mo-2.8Nb-0.2Si-.260 Beta Titanium Alloys for Application in Prosthetic Implants

Bhambri, SK
Senior Research Engineer, and Group Managers, Zimmer, Inc., a wholly owned subsidiary of Bristol-Myers Squibb Company, Warsaw, IN

Shetty, RH
Senior Research Engineer, and Group Managers, Zimmer, Inc., a wholly owned subsidiary of Bristol-Myers Squibb Company, Warsaw, IN

Gilbertson, LN
Senior Research Engineer, and Group Managers, Zimmer, Inc., a wholly owned subsidiary of Bristol-Myers Squibb Company, Warsaw, IN

Pages: 8    Published: Jan 1996

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Abstract

Two recently developed Ti-15Mo based beta titanium alloys, TIMETAL 21S and TIMETAL 21S Rx alloys, were studied in solution annealed, and aged conditions for use in prosthetic implant devices. The heat treatment response of these alloys was explored to evolve microstructures with optimum mechanical properties. The mechanical properties of solution annealed TIMETAL 21S Rx alloy exceeded the minimum stipulated values for Ti-6Al-4V alloy in ASTM F136-92. Optimum tensile and fatigue properties were obtained for 593°C aged TIMETAL 21S alloy and 565°C aged TIMETAL 21S Rx alloy. Simulated modular head/taper tests conducted on these alloys with cobalt-chromium-molybdenum alloy heads indicated that their fretting fatigue behavior was comparable to Ti-6Al-4V alloy.