Preprint Article Version 1 This version not peer reviewed

Study of the Influence of TiB Content and Temperature in the Properties of in Situ Titanium Matrix Composites

Version 1 : Received: 27 September 2017 / Approved: 27 September 2017 / Online: 27 September 2017 (16:49:28 CEST)

A peer-reviewed article of this Preprint also exists.

Arévalo, C.; Montealegre-Melendez, I.; Pérez-Soriano, E.M.; Ariza, E.; Kitzmantel, M.; Neubauer, E. Study of the Influence of TiB Content and Temperature in the Properties of In Situ Titanium Matrix Composites. Metals 2017, 7, 457. Arévalo, C.; Montealegre-Melendez, I.; Pérez-Soriano, E.M.; Ariza, E.; Kitzmantel, M.; Neubauer, E. Study of the Influence of TiB Content and Temperature in the Properties of In Situ Titanium Matrix Composites. Metals 2017, 7, 457.

Journal reference: Metals 2017, 7, 457
DOI: 10.3390/met7110457

Abstract

This work focuses on the study of the microstructure, hardening and stiffening effect caused by the secondary phases formed in titanium matrices. These secondary phases were originated from reactions between the matrix and boron particles added in the starting mixtures of the composites. Not only was the composite composition studied as an influencing factor in the behaviour of the composites, but also different operational temperatures. Three volume percentages of boron content were tested (0.9, 2.5 and 5 vol % of amorphous boron). The manufacturing process used to produce the composites was inductive hot pressing, which operational temperatures were between 1000 °C to 1300 °C. Specimens showed optimal densification. Moreover, microstructural study revealed the formation of TiB in various shapes and proportions. Mechanical testing confirmed that the secondary phases had a positive influence on the properties of the composites. In general, adding boron particles increased the hardness and stiffness of the composites; however rising temperatures resulted in greater increases in stiffness than in hardness.

Subject Areas

in situ Titanium composites, microstructure analysis, TiB precipitates

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