[T11] Tribology in PM

[16C-T11-07] Improvement of Mechanical Properties of CoCrMo Alloys through Microstructure Engineering Using Powder Metallurgy

*P. Alvaredo¹, L. García de la Cruz¹, J. M. Torralba ^{1, 2}, M. Campos¹ (1.Universidad Carlos III de Madrid, Spain, 2.IMDEA Materials Institute, Spain)

Keywords:microstructure engineering, Spark Plasma Sintering

One of the strategies to improve mechanical performance in metallic materials is the design of microstructures. For instance, bimodal microstructures can yield a good balance between strength and ductility. However, microstructure engineering cannot be easily performed by conventional processing techniques such as casting. With this aim, powder metallurgy offers high versatility, allowing the modification of the powder prior to sintering, as well as different consolidation techniques that highly impact the resulting microstructure.This work investigates the combination of surface deformation of powder particles by mechanical milling with rapid sintering by Spark Plasma Sintering to manufacture CoCrMo parts with advanced properties. The results show a bimodal microstructure and highly competitive wear resistance values for biomedical applications.