Title:
COBALT ALLOYS, METHODS OF MAKING COBALT ALLOYS, AND IMPLANTS AND ARTICLES OF MANUFACTURE MADE THEREFROM
Document Type and Number:
WIPO Patent Application WO2005007909
Kind Code:
A3
Abstract:
Embodiments of the present invention provide methods of processing cobalt alloys including, in weight percent, from 26 to 30 chromium, from 5 to 7 molybdenum, and greater than 50 cobalt, the methods comprises cold working and aging the alloys such that after aging the cobalt alloys have a hardness of at least Rockwell C 50. Other embodiments provide methods of selectively cold working at least one portion of a cobalt alloy, and subsequently aging the alloy, such after aging, the selectively cold worked portions of the alloy have a higher hardness value then portions of the alloy that were not selectively cold worked. The present invention also discloses cobalt alloys, implants, and articles of manufacture made from cobalt alloys within the present invention.
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Inventors:
KENNEDY RICHARD L (US)
LIPPARD HENRY E (US)
LIPPARD HENRY E (US)
Application Number:
PCT/US2004/010066
Publication Date:
June 16, 2005
Filing Date:
April 01, 2004
Export Citation:
Assignee:
ATI PROPERTIES INC (US)
KENNEDY RICHARD L (US)
LIPPARD HENRY E (US)
KENNEDY RICHARD L (US)
LIPPARD HENRY E (US)
International Classes:
A61F2/30; A61L27/04; A61L31/02; C22C19/07; C22F1/10; A61B17/80; A61B17/84; A61B17/86; A61F2/00; A61F2/24; A61F2/32; A61F2/36; A61F2/38; A61F2/40; A61F2/44; A61F2/82; (IPC1-7): C22C19/07; C22F1/10; A61F2/02
Foreign References:
| US5462575A | 1995-10-31 | |||
| EP0804934A2 | 1997-11-05 | |||
| US6187045B1 | 2001-02-13 |
Other References:
LIPPARD, H. E. ET AL: "Process metallurgy of wrought CoCrMo alloy", ASTM SPECIAL TECHNICAL PUBLICATION , STP 1365(COBALT-BASE ALLOYS FOR BIOMEDICAL APPLICATIONS), 98-107 CODEN: ASTTA8; ISSN: 0066-0558, 1999, XP009042453
ZHUANG, L. Z. ET AL: "Determination of cyclic strain-hardening behavior produced during fatigue crack growth in cast cobalt-chromium-molybdenum alloy used for surgical implants", MATERIALS SCIENCE & ENGINEERING, A: STRUCTURAL MATERIALS: PROPERTIES, MICROSTRUCTURE AND PROCESSING , A108, 247-52 CODEN: MSAPE3; ISSN: 0921-5093, 1989, XP001204740
LEVINE, DAVID J.: "Metallurgical relationships of porous-coated ASTM F75 alloys", ASTM SPECIAL TECHNICAL PUBLICATION , 953(QUANT. CHARACT. PERFORM. POROUS IMPLANTS HARD TISSUE APPL.), 60-73 CODEN: ASTTA8; ISSN: 0066-0558, 1987, XP009042452
SALDIVAR, A. J. ET AL: "Role of aging on the martensitic transformation in a cast cobalt alloy", SCRIPTA MATERIALIA , 45(4), 427-433 CODEN: SCMAF7; ISSN: 1359-6462, 2001, XP004327933
ZHUANG, L. Z. ET AL: "Determination of cyclic strain-hardening behavior produced during fatigue crack growth in cast cobalt-chromium-molybdenum alloy used for surgical implants", MATERIALS SCIENCE & ENGINEERING, A: STRUCTURAL MATERIALS: PROPERTIES, MICROSTRUCTURE AND PROCESSING , A108, 247-52 CODEN: MSAPE3; ISSN: 0921-5093, 1989, XP001204740
LEVINE, DAVID J.: "Metallurgical relationships of porous-coated ASTM F75 alloys", ASTM SPECIAL TECHNICAL PUBLICATION , 953(QUANT. CHARACT. PERFORM. POROUS IMPLANTS HARD TISSUE APPL.), 60-73 CODEN: ASTTA8; ISSN: 0066-0558, 1987, XP009042452
SALDIVAR, A. J. ET AL: "Role of aging on the martensitic transformation in a cast cobalt alloy", SCRIPTA MATERIALIA , 45(4), 427-433 CODEN: SCMAF7; ISSN: 1359-6462, 2001, XP004327933
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