Bending Fatigue Behavior of Blast Cleaned Grey Cast Iron

Bending Fatigue Behavior of Blast Cleaned Grey Cast Iron

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

download PDF

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.

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


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.

[1] S.S. Mroz, G.M. Goodrich, Quantification of Shot Blast Cleaning Effects on Cast Iron as-cast Surfaces, Transactions of the American Foundry Society, Vol. 114. 114 (2006) 493-506.
[2] S. Boonmee, D. Stefanescu, Effect of casting skin on fatigue properties of CG iron, International Journal of Metalcasting. 7 (2013) 15-26.
[3] R. Lin Peng, T. Vuoristo, D. Bäckström, M. Ahmad, M. Lundberg, S. Johansson, Fatigue strength of shot peened compacted graphite iron, ICSP-12, Goslar, Germany (2014).
[4] B. Kaouache, D. Bäckström, M. Ahmad, T. Vuoristo, S. Johansson, R. Lin Peng, To increase fatigue strength of grey iron by shot peening, ICEAF-IV, Skiathos, Greece (2015).
[5] M. Wollmann, S. Koda, L. Wagner, The Influence of Shot Peening on the Fatigue Behavior of Gray Cast Iron and Ductile Iron, in Shot Peening and Other Mechanical Surface Treatments – Science and Applications, L. Wagner Ed. Self-publishing (2014).
[6] S. Bagherifard, I. Fernandez-Pariente, R. Ghelichi, M. Guagliano, Effect of severe shot peening on microstructure and fatigue strength of cast iron, Int. J. Fatigue. (2013).
[7] A. Zammit, M. Mhaede, M. Grech, S. Abela, L. Wagner, Influence of shot peening on the fatigue life of Cu–Ni austempered ductile iron, Mater. Sci. and Eng. A 545 (2012) 78-85.
[8] M. Lundberg, R. Lin Peng, M. Ahmad, D. Bäckström, T. Vuoristo, S. Johansson, Fatigue strength of machined and shot peened grey cast iron, Adv. Mater. Res. 891-892 (2014) 30-35.
[9] M. Lundberg, R.L. Peng, M. Ahmad, T. Vuoristo, D. Bäckström, S. Johansson, Residual stresses in shot peened Grey and compact iron, HTM J. Heat Treat. Mater. 69 (2014) 38-45.
[10] Y. Uematsu, T. Kakiuchi, K. Tokaji, K. Nishigaki, M. Ogasawara, Effects of shot peening on fatigue behavior in high speed steel and cast iron with spheroidal vanadium carbides dispersed within martensitic-matrix microstructure, Mater. Sci. and Eng. A 561 (2013) 386-393.