Design and evaluation of Ti-15Mo-2Fe alloy for biomedical applications based on electronic parameters

Metastable β-Ti alloys that are evaluated using various electronic parameters to predict their phases and deformation products are gaining much research attention, especially in the biomedical application space. The aim on this study is to evaluate the influence of phase and deformation mechanism on the compression properties of Ti-15Mo-2Fe wt.% alloy designed using electronic parameters such as the B0-Md, and the Moeq methods. Phase evolution and deformation mechanism were experimentally evaluated before and after compression test using X-ray diffraction, and Optical Microscope. The XRD patterns before and after compression illustrated the presence of α′′, “R” and β phases. OM micrograph demonstrated β equiaxed grains only before compression and wide deformation bands and slip lines that could be related to deformation mechanism such as mechanical twins and slip were detected in the Ti-15Mo- 2Fe. The alloy exhibited high ultimate compressive strength of 1522 MPa, compressive yield of 1088 MPa and compressive strain of 33%. The alloy showed potential to be considered for biomedical applications especially those in vascular stents because of its high strength and % strain.