Contact damage failure analyses of fretting wear behavior of the metal stem titanium alloy–bone cement interface. (November 2015)

• Record Type: Journal Article
• Authors: Zhang, Lanfeng; Ge, Shirong; Liu, Hongtao; Wang, Qingliang; Wang, Liping; Xian, Cory J.
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 51(2015)
• Page Start: 132
• Page End: 146
• Publication Date: 2015-11
• Subjects: Metal -- Stem–bone cement interface -- Fretting wear -- Fretting fatigue; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2015.06.025
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: Although cemented titanium alloy is not favored currently in the Western world for its poor clinical and radiography outcomes, its lower modulus of elasticity and good biocompatibility are instrumental for its ability supporting and transforming physical load, and it is more suitable for usage in Chinese and Japanese populations due to their lower body weights and unique femoral characteristics. Through various friction tests of different cycles, loads and conditions and by examining fretting hysteresis loops, fatigue process curves and wear surfaces, the current study investigated fretting wear characteristics and wear mechanism of titanium alloy stem–bone cement interface. It was found that the combination of loads and displacement affected the wear quantity. Friction coefficient, which was in an inverse relationship to load under the same amplitude, was proportional to amplitudes under the same load. Additionally, calf serum was found to both lubricate and erode the wear interface. Moreover, cement fatigue contact areas appeared black/oxidative in dry and gruel in 25% calf serum. Fatigue scratches were detected within contact areas, and wear scars were found on cement and titanium surfaces, which were concave-shaped and ring concave/ convex-shaped, respectively. The coupling of thermoplastic effect and minimal torque damage has been proposed to be the major reason of contact damage. These data will be important for further studies analyzing metal–cement interface failure performance and solving interface friction and wear debris production issues. Highlights: The Ft– D and fatigue process curves showed the wear mechanism of material dissipation. The calf serum was found to both lubricate and erode the wear interface. The concave and convex-shaped wear scars were separately detected on cement and metal. The coupling of thermoplastic effect and minimal torque affected the contact damage.