Effect of Fe content, sintering temperature and powder processing on the microstructure, fracture and mechanical behaviours of Ti-Mo-Zr-Fe alloys

Abstract

The present work studies the effect of iron on the microstructural characterization and mechanical properties of Ti12Mo6ZrxFe alloys that fabricated by two different techniques elemental blend (EB) at 600 MPa and mechanical alloying (MA) at 600 MPa and 900 MPa with different sintering temperatures. The Ti12Mo6ZrxFe (x = 1, 2, 3 and 4 wt.%) alloys were investigated to develop new biomedical materials used for dental implant application. The microstructure, residual porosity and the mechanical properties of the sintered Ti12Mo6ZrxFe alloys were investigated by using optical microscopy, X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy dispersive X-ray (EDX), microhardness and bending stress-strain curves. The results indicated that addition of Zr and a small amount of Fe improves the β-phase stability and improving the properties of Ti-Mo alloy. In addition, with increasing the sintering temperatures, the microstructure became more homogeneous for β phase, which decreases in the modulus and strength. The Mechanical alloying allows highly homogeneous composition and particle morphology. Bending strength in EB is much higher than MA techniques. Increasing of compaction pressure during MA technique increases the bending strength and decreases the porosity. Moreover, the Ti12Mo6Zr2Fe alloys exhibited higher bending strength/modulus ratios.

Development of new high performance Titanium alloys with Fe-addition for dental implants

“…For quaternary alloys like Ti-12Mo-6Zr-3Fe; β-phases reaches almost 100%. Average β-phases decreased with higher % of Fe with elemental blend techniques and from EDX analysis; it is also confirmed the good distribution of alloying element from my previous paper (Mohan et al, 2017). Due to solubility of alloying element in Zr, the alloy Zr-12Mo-xTi have equiaxed β crystal grain can be observed (Nie et al, 2014).…”

Corrosion and Tribocorrosion Behavior of Ti-40Nb and Ti-25Nb-5Fe Alloys Processed by Powder Metallurgy

“…Chaves et al [15] explored the microstructural properties and mechanical behavior of b-type Ti-(10, 15, and 25)Nb-3Fe alloys and reported that Ti-25Nb-3Fe alloy exhibited improved phase stability and the lowest Young's modulus (65 GPa). Mohan et al [16] produced Ti-12Mo-6Zr-xFe (x = 1, 2, 3, and 4) alloys by P/M and reported that additions of small amounts of Fe improved the b-phase stability. Apart from structural and mechanical properties, biological response of cast Ti-5Nb-xFe (x = 0, 1, 2, 3, 4, and 5) alloys was investigated by Hsu et al [17] where all studied alloys were reported as biocompatible.…”

Laser Surface Modification in Ti-xNb-yMo Alloys Prepared by Powder Metallurgy

“…The composition of each alloy plays a decisive role in its final mechanical properties. Both Nb and Mo have a strong β-stabilizing effect on Ti alloys, but Mo appears to increase mechanical characteristics to a greater extent than Nb [17,18]. The variability in flexural strength data is decomposed into statistically significant contributions due to Mo content, relative density, and grain size, as depicted in Figure 12.…”