Fabrication of a High Performance Ti Alloy Implant for an Artificial Hip Joint

Abstract:

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A new fabrication process of a stem for an artificial hip joint has been investigated to improve mechanical properties and to reduce both the fabrication cost and consumption of expensive Ti alloys by swaging and die-forging into near-net-shape at room temperature, followed by local heat treatment and precise machining. In this study metastable Ti-Nb-Sn alloys consisting of non-cytotoxic elements (biocompatible Ti alloys) were used for biomedical applications. It is found that swaging at both ends of a rod before die-forging saves material consumption by approximately 50% in comparison with turning, and enhances subsequent age-hardening. In addition the cold die-forging enables the fabrication costs to decrease. It is suggested that high strength of higher than 1100 MPa in the proximal part connected to a stem head and low Young’s modulus of less than 60 GPa in the distal part implanted in a femur can be obtained simultaneously in advanced Ti alloy stems.

Info:

Periodical:

Materials Science Forum (Volumes 620-622)

Edited by:

Hyungsun Kim, JienFeng Yang, Tohru Sekino and Soo Wohn Lee

Pages:

591-594

DOI:

10.4028/www.scientific.net/MSF.620-622.591

Citation:

T. K. Jung et al., "Fabrication of a High Performance Ti Alloy Implant for an Artificial Hip Joint ", Materials Science Forum, Vols. 620-622, pp. 591-594, 2009

Online since:

April 2009

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Price:

$35.00

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