Effect of Dengeling on Bending Fatigue Behaviour of Al Alloy 7050 and Comparison with Milling and Shot Peening
R.L. Peng, L. Selegård, M. Jonsson, M. Ess, G. Peterséndownload PDF
Abstract. Dengeling is a new surface mechanical treatment developed as an alternative to the shot peening method used for enhancing the fatigue resistance of metallic materials. In this work, Dengeling is compared with milling and shot peening with regard to the effect on bending fatigue behavior of aluminium alloy AA 7050 T7651. In addition, the influence of certain Dengeling process parameters on the fatigue resistance is studied. Flat bar samples were milled and then subjected to the respective surface treatments. The induced surface integrity changes, namely residual stresses and surface deformation, were characterized by X-Ray diffraction measurement. Four-point bending fatigue tests with a stress ratio of R=0.1 were performed. The results show that all the surface treatments in general improve the fatigue performance of the milled samples but the samples treated by the Dengeling process with similar Almen intensity as the shot peening treatment perform best.
Dengeling, Shot Peening, Milling, Bending Fatigue, Al Alloy
Published online 9/11/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: R.L. Peng, L. Selegård, M. Jonsson, M. Ess, G. Petersén, ‘Effect of Dengeling on Bending Fatigue Behaviour of Al Alloy 7050 and Comparison with Milling and Shot Peening’, Materials Research Proceedings, Vol. 6, pp 203-208, 2018
The article was published as article 32 of the book Residual Stresses 2018
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