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Type: Artigo de periódico
Title: Microstructure of directionally solidified Ti-Fe eutectic alloy with low interstitial and high mechanical strength
Author: Contieri, RJ
Lopes, ESN
de la Cruz, MT
Costa, AM
Afonso, CRM
Caram, R
Abstract: The performance of Ti alloys can be considerably enhanced by combining Ti and other elements, causing an eutectic transformation and thereby producing composites in situ from the liquid phase. This paper reports on the processing and characterization of a directionally solidified Ti-Fe eutectic alloy. Directional solidification at different growth rates was carried out in a setup that employs a watercooled copper crucible combined with a voltaic electric arc moving through the sample. The results obtained show that a regular fiber-like eutectic structure was produced and the interphase spacing was found to be a function of the growth rate. Mechanical properties were measured using compression, microindentation and nanoindentation tests to determine the Vickers hardness, compressive strength and elastic modulus. Directionally solidified eutectic samples presented high values of compressive strength in the range of 1844-3000 MPa and ductility between 21.6 and 25.2%. (C) 2011 Elsevier B.V. All rights reserved.
Subject: Directional solidification
X-ray diffraction
Optical microscopy
Titanium compounds
Country: Holanda
Editor: Elsevier Science Bv
Citation: Journal Of Crystal Growth. Elsevier Science Bv, v. 333, n. 1, n. 40, n. 47, 2011.
Rights: fechado
Identifier DOI: 10.1016/j.jcrysgro.2011.07.007
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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