Microstructural Evolution during Sintering of the P/M Blended Elemental Ti-5Al-2.5Fe Alloy

Rodrigo P. Siqueira; Hugo Ricardo Zschommler Sandim; Vinicius André Rodrigues Henriques; J.F.C. Lins

doi:10.4028/www.scientific.net/MSF.498-499.55

Paper Titles

Explosion Study of an Iron Powder Reduction Furnace
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Characterization of Ti-35Nb-7Zr-5Ta Alloy Produced by Powder Metallurgy
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Microstructural Evolution of Ti-13Nb-13Zr Alloy during Sintering
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The Use of High Energies Radiations to Characterise Solid-Liquid Systems
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Microstructural Evolution during Sintering of the P/M Blended Elemental Ti-5Al-2.5Fe Alloy
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A Study of Settling Techniques for Measurement of the Size Distribution of Solid Particles
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Organophilization of Four Differents Bentonitic Clays with a Quaternary Ammonium Salt
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Particle Size Distribution Analysis of an Alumina Powder: Influence of Some Dispersants, pH and Supersonic Vibration
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Machining and Mechanical Characterisation of PM Materials for Valve Seat Inserts
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HomeMaterials Science ForumMaterials Science Forum Vols. 498-499Microstructural Evolution during Sintering of the...

Microstructural Evolution during Sintering of the P/M Blended Elemental Ti-5Al-2.5Fe Alloy

Abstract:

The alpha-beta Ti-5%Al-2.5Fe (wt-%) alloy was developed as a cost-effective option to replace the traditional Ti-6%Al-4%V alloy in the manufacture of surgical implants because of its larger biocompatibility (V-free alloy). Samples of this alloy were prepared using the blended elemental (BE) technique. The isochronal sintering of the cold pressed compacts was carried out at 700, 1000, and 1400°C in vacuum. In this work, the preliminary results of the behavior of elementary powders during sintering and the corresponding microstructural evolution are shown. The alloy was characterized by means of scanning electron microscopy (SEM) in the backscattered mode, X-ray diffraction (XRD), energy-dispersive spectrometry (EDS), and density measurements. The results indicate that the homogenization of the alloy is diffusion-controlled. Non-equilibrium Ti-Al phases as well as Fe-Al compounds were identified in samples sintered at lower temperatures (700oC). With increasing temperature, homogenization of the alloy takes place and a structure consisting of coarse plate-like alpha and intergranular beta is present.