Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 609, Issue -, Pages 34-41Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.04.091
Keywords
Titanium matrix composites; Microstructure; TiB whiskers; Tensile properties
Categories
Funding
- Alexander von Humboldt Foundation
- German Academic Exchange Service (DAAD)
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Microstructure and mechanical behavior of near eutectic Ti-1.5 wt% B and hypereutectic Ti-2B wt% B composite materials obtained by casting have been investigated. Commercially pure titanium was used as a matrix material. Homogeneously distributed TiB whiskers were revealed in the as-cast composite materials. Multiple isothermal 2-D forging of the composites was carried out in the temperature range of the beta phase field. The hot forging led to effective alignment of boride whiskers while retaining a high aspect ratio. Tensile mechanical tests in as-cast and forged conditions were carried out at room and elevated temperatures. The composites demonstrated much higher strength in comparison with the matrix material without drastic ductility reduction. The effect of boride orientation and morphology on the tensile properties of the composite materials is discussed. (C) 2014 Elsevier B.V. All rights reserved.
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