Sintering study of Ti6Al4V powders with different particle sizes and their mechanical properties

Jos&#233; Luis Cabezas-Villa; Jos&#233; Lemus-Ruiz; Didier Bouvard; Omar Jim&#233;nez; H&#233;ctor Javier Vergara-Hern&#225;ndez; Luis Olmos

doi:10.1007/s12613-018-1693-5

Volume 25 Issue 12

Dec. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(12): 1389-1401

José Luis Cabezas-Villa, José Lemus-Ruiz, Didier Bouvard, Omar Jiménez, Héctor Javier Vergara-Hernández, and Luis Olmos, Sintering study of Ti6Al4V powders with different particle sizes and their mechanical properties, Int. J. Miner. Metall. Mater., 25(2018), No. 12, pp. 1389-1401. https://doi.org/10.1007/s12613-018-1693-5

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José Luis Cabezas-Villa, José Lemus-Ruiz, Didier Bouvard, Omar Jiménez, Héctor Javier Vergara-Hernández, and Luis Olmos, Sintering study of Ti6Al4V powders with different particle sizes and their mechanical properties, Int. J. Miner. Metall. Mater., 25(2018), No. 12, pp. 1389-1401. https://doi.org/10.1007/s12613-018-1693-5

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Research Article

Sintering study of Ti6Al4V powders with different particle sizes and their mechanical properties

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Corresponding author:
Luis Olmos E-mail: luisra24@gmail.com
Received: 6 March 2018; Revised: 19 June 2018; Accepted: 21 June 2018

Abstract

Abstract

Ti6Al4V powders with three different particle size distributions (0-20, 20-45, and 45-75 μm) were used to evaluate the effect of the particle size distribution on the solid-state sintering and their mechanical properties. The sintering kinetics was determined by dilatometry at temperatures from 900 to 1260℃. The mechanical properties of the sintered samples were evaluated by microhardness and compression tests. The sintering kinetics indicated that the predominant mechanism depends on the relative density irrespective of the particle size used. The mechanical properties of the sintered samples are adversely affected by increasing pore volume fraction. The elastic Young's modulus and yield stress follow a power law function of the relative density. The fracture behavior after compression is linked to the neck size developed during sintering, exhibiting two different mechanisms of failure:interparticle neck breaking and intergranular cracking in samples with relative densities below and above of 90%, respectively. The main conclusion is that relative density is responsible for the kinetics, mechanical properties, and failure behavior of Ti6Al4V powders.
- Ti6Al4V powders;
- dilatometry;
- microhardness;
- sintering kinetics;
- compression;
- failure behavior

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