SYMPOSIA PAPER Published: 01 January 1999
STP14265S

A Dispersion Strengthened Co-Cr-Mo Alloy for Medical Implants

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A dispersion strengthened version of forged Co-Cr-Mo alloy, GADS Vitallium® alloy, was developed to improve fatigue strength after sintering (1300°C), a required thermal cycle treatment for porous coated products. GADS alloy was made using a powder metallurgy process to create fine dispersed oxides in the alloy. The dispersed fine particles strengthen the alloy and prevent grain growth so that the alloy retains fatigue strength almost twice that of the standard forged alloy (ASTM F-799, Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants) following porous coating sintering. The processing development, grain structures, fatigue properties, and corrosion resistance of the gas-atomized dispersion strengthened (GADS) alloy are reported here.

Author Information

Wang, KK
Research and Development, Howmedica Inc., Pfizer Medical Technology Group, Rutherford, NJ
Berlin, RM
Research and Development, Howmedica Inc., Pfizer Medical Technology Group, Rutherford, NJ
Gustavson, LJ
Research and Development, Howmedica Inc., Pfizer Medical Technology Group, Rutherford, NJ
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Details
Developed by Committee: F04
Pages: 89–97
DOI: 10.1520/STP14265S
ISBN-EB: 978-0-8031-5409-4
ISBN-13: 978-0-8031-2608-4