Original Article

Effect of Mo ratio on the microstructure and mechanical properties of TiMoNi alloys fabricated by powder metallurgy method

¹ Bingol University, Department of Mechanical Engineering, Bingol 12000, Turkey
² Sivas University of Science and Technology, Faculty of Aviation and Space Sciences, Department of Astronautical Engineering, Sivas 58000, Turkey

^* e-mail: zbalalan@bingol.edu.tr

Received: 22 March 2023
Accepted: 18 June 2023

Abstract

TiNi alloys have good biocompatibility and are widely used as biomaterials in the human body. Mo is a nontoxic element and increases biocompatibility as well as corrosion resistance. Ti-Mo-Ni-based alloys utilized in biomedical applications should have high strength. In this context, the microstructure and mechanical properties of TixMo6Ni alloys produced by the powder metallurgy method were investigated in this study. Five different Ti alloys were obtained by adding a fixed amount of (6%) Ni and different ratios (1, 3, 5, 8, 10%) Mo into the Ti powder. Alloy powders were sintered at different temperatures after pressing with a constant pressure of 520 MPa. In general, the highest density values were reached at 1250 °C. Microstructure examinations were performed by scanning electron microscopy (SEM), energy distribution spectrometry (EDS) and X-ray diffraction analysis (XRD) analyses. In the microstructure, it was observed that the grain size and pores increased as the Mo ratio increased. The hardness values increased with the increase of the Mo ratio. However, the relative density values decreased with increasing Mo ratio.