Development of corrosion resistant surfaces via friction stir processing for bio implant applications

2017 2nd International Conference on Innovative Engineering Materials

Sodhi, Gurvinder Pal Singh^1 ; Singh, Harpreet^1

Department of Mechanical Engineering, Indian Institute of Technology Ropar Rupnagar, Punjab, India^1

关键词: Biomedical applications;    Chemical compositions;    Corrosion-resistant;    Friction stir processing;    Hall Petch relationship;    In-vitro corrosions;    Mechanical and corrosion properties;    Uniform distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/284/1/012026/pdf
DOI  :  10.1088/1757-899X/284/1/012026

来源: IOP

【 摘 要 】

Current investigation presents the use of Friction Stir Processing (FSP) to improve the corrosion resistance of pure magnesium for biomedical applications. FSP has been used to incorporate hydroxyapetite (HAP) into Mg-surface so as to modify the chemical composition. FSP was done within a matrix of different parameters and conditions. Influence of various parameters on microstructure was also clearly observed. XRD analysis confirmed the presence of HAP, whereas SEM images revealed a uniform distribution of the imbedded phase. Microhardness and in-vitro corrosion studies were also performed. Influence of grain size on hardness was validated by Hall-Petch relationship. Corrosion behavior was explained on the basis of texture, which indicated better corrosion resistance in comparison to the pure Mg. Therefore, the study reveals that the proposed FSP methodology can be useful tool to improve mechanical and corrosion properties of pure Mg for biomedical applications.