Bending Fatigue Behavior of Blast Cleaned Grey Cast Iron

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Bending Fatigue Behavior of Blast Cleaned Grey Cast Iron

M. Ahmad, R.L. Peng, M. König, S. Johansson

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Abstract. This paper presents a detailed study on the effect of an industrial blast cleaning process on the fatigue behavior of a grey cast iron with regard to the residual stresses and microstructural changes induced by the process. A comparison was also made to the effect of a machining operation which removed the casting skin layer. The blast cleaning process was found to greatly improve the fatigue resistance in both the low and high cycle regimes with a 75% increase in the fatigue limit. X-ray diffraction measurements and scanning electron microscopic analyses showed that the improvement was mainly attributed to compressive residual stresses in a surface layer up to 800 µm in thickness in the blast cleaned specimens. The machining also gave better fatigue performance with a 30% increase in the fatigue limit, which was ascribed to the removal of the weaker casting skin layer.

Keywords
Cast Iron, Blast Cleaning, Machining, Bending Fatigue, Residual Stress

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: M. Ahmad, R.L. Peng, M. König, S. Johansson, ‘Bending Fatigue Behavior of Blast Cleaned Grey Cast Iron’, Materials Research Proceedings, Vol. 2, pp 193-198, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-33

The article was published as article 33 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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