Project Details
Projekt
Improvement of the endurance limit and the coatability by plasma electrolytic oxidation of the titanium alloy Ti-6Al-4V through shot peening with liquid CO2 and fine-grained peening medium
Subject Area
Mechanical Properties of Metallic Materials and their Microstructural Origins
Term
since 2024
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 543599442
Due to the increased life expectancy of the population and the limited lifespan of prostheses, implants with better mechanical and biological properties are required to increase their life expectancy. In this research project a bio-functional surface shall be deposited on the titanium alloy Ti-6Al-4V (Ti64) by plasma electrolytic oxidation (PEO) and the influence of shot peening and bioactive ceramic coating on the fatigue behaviour of Ti64 shall be investigated. The innovative shot peening with liquid carbon dioxide is a dry machining process that is predestined to accelerate small ceramic beads at pressures of up to 3000 bar. Thereby, it has the potential to introduce high residual stresses deep into the material. Through the combination of shot peening and PEO coating, advantageous structural and surface properties are expected whose interaction with physiological media plays an important role for the long-term success of implants. Therefore, furthermore, fatigue tests will be carried out in quasiphysiological solutions that simulate the conditions in the body. Overall, the method combination of the novel shot peening process and PEO coating is expected to provide advantages in terms of static and cyclic strength, coating adhesion as well as in the processing of parts and surfaces with a complex shape and structure.
DFG Programme
Research Grants
