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Fatigue Crack Growth Behaviour of Nitrided and Shot Peened Specimens

C. Colombo1, M. Guagliano1,2, L. Vergani1

1 Politecnico di Milano, Dipartimento di Meccanica
2 Corresponding author: Tel.: 02.2399.8206; Fax.: 02.2399.8202; E-mail: Extended version of the paper presented at the Conference “Fracture and Damage Mechnics IV”, Mallorca, July 12-14, 2005

Structural Durability & Health Monitoring 2005, 1(4), 253-266.


In this paper the fatigue crack growth properties of a nitrided and shot-peened steel is dealt with: different peening intensities were considered and the resulting residual stresses measured by means of an X-ray diffractometer. Rotating bending fatigue tests were executed on specimens including a blind micro hole, acting as a pre-existent crack. The fracture surface of broken specimens was observed with a SEM to detect the crack growth initiation point. The run-out specimens were broken after the test and the presence of non-propagating cracks detected. The results allowed to determine the propagation threshold of the nitrided and shot peened material.


Cite This Article

Colombo, C., Guagliano, M., Vergani, L. (2005). Fatigue Crack Growth Behaviour of Nitrided and Shot Peened Specimens. Structural Durability & Health Monitoring, 1(4), 253–266.

cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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