Microstructural evolution and strengthening mechanisms in Ti–Nb–Zr–Ta, Ti–Mo–Zr–Fe and Ti–15Mo biocompatible alloys

Preparation and characterization of Ti-15Mo alloy used as biomaterial

“…Figure 3 also presents a comparison of the results obtained in this paper with previously published studies in the literature [23][24][25] , showing good agreement with them. Figure 3 also shows that the sample after hot swaging (Ti-15Mo#1) presents a hardness value higher than after melting (Ti-15Mo#0).…”

“…The microhardness values of Ti-15Mo #1, presented in this paper, when compared to the condition (a) are very close. In this condition, Nag et al 25 studied the microstructure using a scanning electron microscopy and the micrographies are very similar to the presented in this paper. In the condition (b) was observed the presence of ω phase using a transmission electron microscopy and the decreasing in the microhardness value of the alloy was attributed to presence of this phase.…”

“…Because the elasticity modulus is directly related to the intensity of these bonds, it will be higher for the α' phase 26 . Figure 5 shows a comparison of the elasticity modulus obtained at 37 °C (body temperature) with results previously published in the literature 7,24,25 and cp-Ti. In previous studies, the elasticity modulus of β-type alloys are between 55 and 124 GPa 1,6,25 , which is in accordance with the results obtained for the Ti-15Mo in this study.…”

“…The Figure 3 also shows the results of microhardness compared with the paper of Nag et al 25 . Nag, in his paper studied two processing conditions for the Ti-15Mo alloy, which were called (a) and (b).…”

“…The ω phase, in Ti-Mo system, is characterized by the weakening of the material and has a tendency to decrease, among other mechanical properties, the hardness value 25 . Although there weren't measurements of transmission electron microscopy to investigate the possible presence of this phase, these effects weren't observed in this paper.…”