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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/11263
Title: Effect of biaxial cyclic tension on the fatigue life and damage mechanisms of Cr-Mo steel
Authors: Gaur, Vidit
Doquet V.
Persent E.
Roguet E.
Published in: International Journal of Fatigue
Abstract: Combined cyclic tension and internal pressure tests with various proportions of each loading were run on a 2.5%Cr-1%Mo steel to investigate the effect of positive stress biaxiality on fatigue lives and damage mechanisms. While moderate stress biaxiality had a beneficial effect on fatigue lives, attributed mainly to a retardation of crack initiation, equibiaxial tension had a slightly detrimental effect, attributed to a "pseudo size effect". Intergranular facets associated with temper and hydrogen embrittlement were observed on the fracture surfaces. The evolutions of their surface fraction with ΔK and load biaxiality suggested a possible reduction in crack growth rate at moderate biaxialities. Several popular multiaxial fatigue criteria failed to describe all fatigue data. Thus, a new fatigue criterion based on Gerber's parabola has been proposed. It captures the evolution of the endurance limit under the combined effects of a positive mean stress and positive biaxiality. © 2016 Elsevier Ltd. All rights reserved.
Citation: International Journal of Fatigue (2016), 87(): 124-131
URI: https://doi.org/10.1016/j.ijfatigue.2016.01.021
http://repository.iitr.ac.in/handle/123456789/11263
Issue Date: 2016
Publisher: Elsevier Ltd
Keywords: Biaxial tension
Fatigue criterion
Hydrogen embrittlement
Intergranular facets
Steel
ISSN: 1421123
Author Scopus IDs: 56229535200
6603630559
35198632700
56229926900
Author Affiliations: Gaur, V., LMS, Ecole Polytechnique, Université Paris-Saclay, UMR, CNRS 7649, Palaiseau, France, IFP Energies Nouvelles, 1-4 avenue de Bois-Préau, Rueil-Malmaison, 92852, France
Doquet, V., LMS, Ecole Polytechnique, Université Paris-Saclay, UMR, CNRS 7649, Palaiseau, France
Persent, E., IFP Energies Nouvelles, 1-4 avenue de Bois-Préau, Rueil-Malmaison, 92852, France
Roguet, E., IFP Energies Nouvelles, 1-4 avenue de Bois-Préau, Rueil-Malmaison, 92852, France
Corresponding Author: Doquet, V.; LMS, Ecole Polytechnique, Université Paris-Saclay, UMR, CNRS 7649France; email: doquet@lms.polytechnique.fr
Appears in Collections:Journal Publications [ME]

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