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Elsevier, Procedia Engineering, 1(2), p. 1067-1075, 2010

DOI: 10.1016/j.proeng.2010.03.115

Elsevier, Procedia Engineering, (10), p. 619-624, 2011

DOI: 10.1016/j.proeng.2011.04.103

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Fatigue crack initiation in a notched single-crystal superalloy component

Journal article published in 2010 by Daniel Leidermark, Johan Moverare ORCID, Mikael Segersäll, Kjell Simonsson, Sören Sjöström, Sten Johansson
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The fatigue crack initiation in a notched single-crystal nickel-base superalloy component at 500 °C was investigated and analysed. A critical plane approach in combination with a critical distance method has been adopted, in which the total shear strain ranges on the discrete slip planes are evaluated. Furthermore, a Coffin-Manson type of expression is used to predict the number of cycles to fatigue crack initiation. The experimental test specimens were studied by microscopy to determine on which crystallographic plane the fatigue initiation occurred. A good correlation between the experimental results and the simulated results were found.