SYMPOSIA PAPER Published: 01 January 1983
STP36799S

Initiation of Fatigue Cracks Around Inclusions in Rolling Fatigue

Source

The cyclic behavior of E52 100 quenched and tempered rolling bearing steel displayed strain-hardening according to the law Δσ/2 = 5790 (Δϵp/2)0.137. The fatigue life was found to be given by the formula Δϵ/2 = 0.0073 (2Nf)-0.36 + 0.0145 (2Nf)-0.062.

The cyclic strain-hardening law was used in a finite-element bidimensional incremental elastoplastic analysis to compute the plastic deformation around inclusions in the Herzian stress field produced by a rolling ball. Three types of inclusions were studied: alumina, titanium nitride, and spinel. The maximum plastic strain region was found to be inclined with respect to the rolling direction as observed in rolling bearings. This strain distribution provided an explanation for the relative harmfulness of the various inclusions. The strain amplitude found could be used to predict the number of cycles for fatigue crack initiation at inclusions using the experimental fatigue life law.

Author Information

Freitas, M
École Centrale des Arts et Manufactures, Grande Voie des Vignes, Chatenay-Malabry, France
Francois, D
École Centrale des Arts et Manufactures, Grande Voie des Vignes, Chatenay-Malabry, France
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E08
Pages: 796–807
DOI: 10.1520/STP36799S
ISBN-EB: 978-0-8031-4870-3
ISBN-13: 978-0-8031-0726-7