Microtensile testing of a free-standing Pt-aluminide bond coat

Alam, Zafir Md and Srivathsa, B and Kamat, SV and Jayaram, V and Das, DK (2011) Microtensile testing of a free-standing Pt-aluminide bond coat. In: Materials & Design, 32 (3). pp. 1242-1252.

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Abstract

A finite element method (FEM)-based study has been carried out for the design of flat microtensile samples to evaluate tensile properties of Pt-aluminide (PtAl) bond coats. The critical dimensions of the sample have been determined using a two-dimensional elastic stress analysis. In the present testing scheme, the ratio of the dimensions of the holding length to the fillet radius of the sample was found important to achieve failure within the gage length. The effect of gage length and grip head length also has been examined. The simulation predictions have been experimentally verified by conducting microtensile test of an actual PtAl bond coat at room temperature. The sample design and testing scheme suggested in this study have also been found suitable for evaluation of tensile properties at high temperature. (C) 2010 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Materials & Design
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Coatings; Mechanical; Brittle fracture
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Mar 2011 09:46
Last Modified:	21 Mar 2011 09:46
URI:	http://eprints.iisc.ac.in/id/eprint/35999

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