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Monotonic and low cycle fatigue behavior of an O+B2 alloy at high temperatures

Srinivasulu, G and Ghosal, P and Singh, N and Naze, L and Nandy, TK and Kumar, V and Kutumbarao, VV and Banerjee, D and Strudel, JL (2014) Monotonic and low cycle fatigue behavior of an O+B2 alloy at high temperatures. In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 599 . pp. 268-278.

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Official URL: http://dx.doi.org/10.1016/j.msea.2014.01.086

Abstract

Low cycle fatigue behavior of an O+B2 alloy was evaluated at 650 degrees C in ambient atmosphere under fully reversed total axial strain controlled mode. Three different microstructures, namely equiaxed O plus aged B2 (fine O plates in B2 matrix), lenticular O laths plus aged B2 and a pancake composite microstructure comprising equiaxed alpha 2, lenticular O and aged B2, were selected to study the effect of microstructure on low cycle fatigue behavior in this class of alloys. Distinct well-defined trends were observed in the cyclic stress-strain response curves depending on the microstructure. The cyclic stress response was examined in terms of softening or hardening and correlated with microstructural features and dislocation behavior. Fatigue life was analyzed in terms of standard Coffin-Manson and Basquin plots and for all microstructures a prevailing elastic strain regime was identified, with a single slope for microstructures equiaxed and composite and a double slope for lenticular O laths. (c) 2014 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the ELSEVIER SCIENCE SA, SWITZERLAND
Keywords: Intermetallics; Plasticity; Fatigue; High temperature
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 28 May 2014 06:37
Last Modified: 28 May 2014 06:37
URI: http://eprints.iisc.ac.in/id/eprint/49075

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