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Three-dimensional modelling of rail steel microstructure and crack growth

Lookup NU author(s): Dr Francis Franklin, Anirudh Gahlot, Dr David Fletcher

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Abstract

A three-dimensional model of microstructure based on convex polyhedra, generated using the Voronoi method, is used to model the early stages of crack growth. The statistical properties of the polyhedra's volumes, and the corresponding polygon areas in a cross-section, are studied and some simple relationships are revealed which are useful for extrapolating 3D microstructure properties from analysis of a 2D micrograph. This representation of microstructure can be used to map grain boundaries, to determine potential routes for, and obstacles to, crack propagation. The model is used to investigate the effect of severe deformation on crack growth, and data from examination of test samples is used to support this. (C) 2010 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Franklin FJ, Gahlot A, Fletcher DI, Garnham JE, Davis C

Publication type: Article

Publication status: Published

Journal: WEAR

Year: 2011

Volume: 271

Issue: 1-2

Pages: 357-363

Print publication date: 14/10/2010

ISSN (print): 0043-1648

ISSN (electronic): 1873-2577

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.wear.2010.10.044

DOI: 10.1016/j.wear.2010.10.044

Notes: Proceedings of the 8th International Conference on Contact Mechanics and Wear of Rail / Wheel Systems, Florence, 2009


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