Microstructural Evolution of Ti-10NB and Ti-15NB Alloys Produced by the Blended Elemental Technique

G.V. Martins; Cosme Roberto Moreira Silva; C.A. Nunes; Vinicius André Rodrigues Henriques; L.A. Borges; João Paulo Barros Machado

doi:10.4028/www.scientific.net/MSF.660-661.152

Paper Titles

Hydrogenation and Discharge Capacity of a La_0.7Mg_0.3Al_0.3Mn_0.4Co_0.5Ni_3.8 Alloy for Nickel-Metal Hydride Batteries
p.128

The Effect of High Charging Rates Activation on the Specific Discharge Capacity and Efficiency of a Negative Electrode Based on a LaMgAlMnCoNi Alloy
p.133

Determination of the Crystal Alignment of Pr-Fe-B Magnets Using the (105) X-Ray Pole Figure
p.139

Microstructural Analysis of Hardmetal Using WC Nanometric Powders
p.145

Microstructural Evolution of Ti-10NB and Ti-15NB Alloys Produced by the Blended Elemental Technique
p.152

Comparison of Particle-Wall Interaction Boundary Conditions in the Prediction of Cyclone Collection Efficiency in Computational Fluid Dynamics (CFD) Modeling
p.158

Quantitative Determination of the Crystalline Phases of the Ceramic Materials Utilizing the Rietveld Method
p.164

Sintering of B₄C by Pressureless Liquid Phase Sintering
p.170

Effect of Hydrogenation Pressure on Microstructure and Mechanical Properties of Ti-13Nb-13Zr Alloy Produced by Powder Metallurgy
p.176

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Microstructural Evolution of Ti-10NB and Ti-15NB Alloys Produced by the Blended Elemental Technique

Abstract:

Alfa/beta titanium alloys have been intensely used for aerospace and biomedical applications. Production of powder metallurgy titanium alloys components may lead to a reduction in the cost of parts, compared to those produced by conventional cast and wrought (ingot metallurgy) processes, because additional working operations (machining, turning, milling, etc.) and material waste can be avoided. In this work, samples of Ti- 10, 15Nb (weight%) alloys were obtained by the blended elemental technique using hydride-dehydride (HDH) powders as raw material, followed by uniaxial and cold isostatic pressing with subsequent densification by sintering carried out in the range 900–1500 °C. These alloys were characterized by X-ray diffractometry for phase composition, scanning electron microscopy for microstructure, Vickers indentation for hardness, Archimedes method for specific mass and resonance ultrasound device for elastic modulus. For the samples sintered at 1500°C it was identified  and  phases. It was observed the influence of the sintering temperatures on the final microstructure. With increasing sintering temperature, microstructure homogenization of the alloy takes place and at 1500 °C this process is complete. The same behavior is observed for densification. Comparing to the Ti6Al4V alloy properties, these alloys hardness (sintered at 1500 °C) are near and elastic modulus are 18% less.