The influence of solution treatment on the phase evolution and tensile properties of binary Ti-Mo alloys
DOI:
https://doi.org/10.17159/Abstract
In the present study, the influence of solution treatment on the phase evolution and tensile properties of Ti-Mo alloy is investigated to assess their potential use in biomedical applications. Different characterization techniques including X-ray diffraction (XRD), Optical microscope (OM), scanning electron microscope (SEM) and electron backscatter diffraction (EBSD) were used to investigate the phase formation and microstructural evolution. The mechanical properties were studied using the tensile test method and bending strength. The XRD analysis of Ti-10.02Mo, Ti-10.83Mo, Ti-12.89Mo and Ti-15.05Mo alloy in as-cast condition comprises α″ and β phase peaks, whereas after solution treatment the volume fraction of β phase increased while α″ was supressed. The OM micrographs of Ti-10.02Mo, Ti-10.83Mo, Ti-12.89Mo and Ti-15.05Mo alloys in as-cast condition show β equi-axed grains with sub-grain structures of different size, while the solution treated micrographs were composed of β equi-axed grains only except for Ti-10.02Mo that comprised needle-like structures of α″. The EBSD show an increase in the volume fraction of the ω and α″ phase after solution treatment in all the designed alloys. The elastic modulus of all the alloy significantly decreased after solution treatment except for the designed alloy Ti-15.05Mo. The UTS of all the Ti-Mo alloys decreased significantly after solution treatment except for Ti-15.05Mo alloy, whereas the elongation significantly increased after solution treatment. The fracture surfaces of all the designed alloys after solution treatment were composed of more ductile fracture than brittle fracture.
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