Fatigue fracture of a high-resistance structural steel component destined to sustain severe loads under service conditions

Journal article (2017)

Authors

S. Papaefthymiou National Technical University of Athens, Hellenic Research Centre for Metals S.A. -ELKEME S.A.
A. Vazdirvanidis Hellenic Research Centre for Metals S.A. -ELKEME S.A.
G. Pantazopoulos Hellenic Research Centre for Metals S.A. -ELKEME S.A.
C. Goulas (OLD) MSE-5
Research Group
(OLD) MSE-5
More Info
expand_more

Published Date

2017

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Research Group

(OLD) MSE-5

Abstract

A structural steel component that failed under fatigue was examined with the aim to identify the root causes of this failure. Fractographic examination revealed the presence of multiple beach marks; the position and arrangement of those signified the occurrence of fatigue fracture under the presence of combined loading conditions, involving torsion and bending stress components. Crack initiation was observed also at the corners of the steel plate where non-metallic inclusions were located. Stereo-microscopical examination of the fracture surface likely revealed the presence of casting inclusions, probably fluxes or slag particles, near the surface and in the interior of the component. These inclusions could be considered inherent—metallurgical stress raisers, behaving as locations of prominent crack nucleation under cyclic fatigue loading, stimulating subsequent crack propagation and final ultimate rupture.

Files

Papaefthymiou2017_Article_Fati... (pdf)
(pdf | 1.77 Mb)
Unknown license

Download not available