The Influence of Surface Roughness on Biocompatibility and Fatigue Life of Titanium Based Alloys

4th International Conference on Competitive Materials and Technology Processes

Major, S.^1 ; Cyrus, P.^1 ; Hubálovská, M.^1

Department of Technical Education, Faculty of Education, University Hradec Králové, Hradec Králové

500 03, Czech Republic^1

关键词: Fatigue cracks;    Mechanical loading;    Rough surfaces;    Smooth surface;    Titanium-based alloys;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/175/1/012053/pdf
DOI  :  10.1088/1757-899X/175/1/012053

来源: IOP

【 摘 要 】

This article deals with the effect of treatment on the mechanical properties ofbiocompatible alloys. In the case of implants, it is desirable to ensure good biocompatibility. Generally, the environment in the body is very aggressive and implants can quickly degrade due the corrosion. The process of corrosion leads to the release of harmful particles into the body. Other reasons for rejection of the implants, is their coverage bacterial plaque. Another reason for the rejection of the implant may be a smooth surface. In some cases, the tissue does not adhere to the smooth surface of the implant, in this regionsoccurs an accumulation of body fluids. This problem can be solved with a rough surface. From the viewpoint of fatigue resistance, the rough surface containing grooves and holes has a negative influence on the fatigue resistance against mechanical loading. The rough surface can be produced by machining or asymmetric deposition of particles of oxides, nitrides or other particles on surface. In this work the formation and propagation of fatigue cracks in the material with granular surface is analysed. The formation and growth of fatigue crack originated from granular surface is simulated. Also, experimental studies were carried out.