Fretting fatigue behavior of surface modified biomedical titanium alloys

被引：12

作者：

Vadiraj, Aravind ^{[1
]}

Kamaraj, M. ^{[2
]}

机构：

[1] Ashok Leyland Tech Ctr, Madras 600103, Tamil Nadu, India

[2] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

来源：

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2010年 / 63卷 / 2-3期

关键词：

biomaterials; titanium alloys; surface modification; Fretting fatigue;

D O I：

10.1007/s12666-010-0030-0

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Fretting is a form of adhesive wear normally occurring at the contact points gradually leading to premature failure of load bearing medical implants made of titanium alloys. The aim of this work is to characterize the fretting fatigue damage features of PVD TiN coated, plasma nitrided, ion implanted, laser nitrided and thermally oxidized Ti-6Al-4V and Ti-6Al-7Nb contact pairs. The surface layers were characterized. The damage progression during fretting process is apparently explained with tangential force coefficient curves. Plasma nitrided pairs showed highest fretting fatigue life compared to others. PVD TiN coated pairs have experienced early failures due to third body mode of contact interaction with irregular tangential force coefficient pattern. Ion implanted layers showed similar damage as unmodified alloys. Laser nitrided and thermally oxidized pairs experienced early failures due to brittle and irregular modified layers.

引用

页码：217 / 223

页数：7

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