Micromechanisms of damage in a hypereutectic Ti-6Al-4V-B alloy

Sen, Indrani and Maheshwari, L and Tamirisakandala, S and Miracle, DB and Ramamurty, U (2009) Micromechanisms of damage in a hypereutectic Ti-6Al-4V-B alloy. In: Materials Science and Engineering: A, 518 (1-2). pp. 162-166.

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Abstract

The tensile stress–strain response and fracture in a hypereutectic Ti–6Al–4V–1.7B (weight percent) alloy were investigated by employing interrupted tensile tests combined with acoustic emission measurements, with the aim to identify the cause for the observed low ductility in this alloy. These tests were complemented with microscopy. The alloy contains TiB whiskers of different length scales, the majority of which include micro-whiskers ( 5–10 μm length) and a few primary-whiskers ( 200–300 μm length). Although the fracture of both types of whiskers occur during deformation, the former leads to a gradual decrease in the secant modulus whereas initiation of the latter leads to a drastic drop in the modulus along with failure of the specimen, limiting the ductility.

Item Type:	Journal Article
Publication:	Materials Science and Engineering: A
Publisher:	Elsevier Science
Additional Information:	copyright of this article belongs to Elsevier Science.
Keywords:	Titanium alloys; Microstructure; Acoustic emission spectroscopy; Interrupted tensile test
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	22 Dec 2009 08:18
Last Modified:	19 Sep 2010 05:42
URI:	http://eprints.iisc.ac.in/id/eprint/22440

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