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The effect of gamma-gamma ` interface on the tensile and shear strengths of nickel-based superalloys: A first-principles study

Kumar, Kaushlendra and Sankarasubramanian, R and Waghmare, Umesh V (2015) The effect of gamma-gamma ` interface on the tensile and shear strengths of nickel-based superalloys: A first-principles study. In: COMPUTATIONAL MATERIALS SCIENCE, 97 . pp. 26-31.

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Official URL: http://dx.doi.org/ 10.1016/j.commatsci.2014.09.042

Abstract

First-principles density functional theory has been used to evaluate the shear and cleavage strength in terms of Griffith work and generalized stacking fault energy (GSF) of (001) plane for gamma, gamma' and gamma-gamma' system as a function of distance from the gamma/gamma' interface. Calculation of Griffith work suggests higher cleavage energy for bulk gamma as compared to gamma' while the GSF calculation suggests higher shear strength for bulk gamma' as compared to gamma. It has been found that the shear strength of the cubic plane of the gamma/gamma' interface is marginally lower than those of bulk gamma and gamma' phases. (C) 2014 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Keywords: Ni-based superalloys; First-principles calculations; Generalized stacking fault energy
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 12 Jan 2015 07:31
Last Modified: 12 Jan 2015 07:31
URI: http://eprints.iisc.ac.in/id/eprint/50619

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