Fabrication of a High Performance Ti Alloy Implant for an Artificial Hip Joint
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 β 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 Youngs modulus of less than 60 GPa in the distal part implanted in a femur can be obtained simultaneously in advanced Ti alloy stems.
biocompatible titanium alloy Youngs modulus strength artificial hip joint cold dieforging
Taek-Kyun Jung Tadasu Abumiya Noya Masahashi Mok-Soon Kim Shuji Hanada
Innovation Plaza Miyagi, Japan Science and Technology Agency, Sendai 989-3204, Japan Institute for Materials Research, Tohoku University, Sendal 980-8577, Japan School of Materials Science and Engineering, Inha University, Incheon 402-751, Korea
国际会议
10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)
西安
英文
591-594
2009-01-13（万方平台首次上网日期，不代表论文的发表时间）