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Straightening of induction hardened shats-inluence on fatigue strength and residual stress
RISE, Swerea, KIMAB.
RISE, Swerea, KIMAB. KTH Royal Institute of Technology, Sweden.
RISE, Swerea, KIMAB.
RISE, Swerea, KIMAB.
2012 (English)In: HTM - Haerterei-Technische Mitteilungen, ISSN 0341-101X, Vol. 67, no 3, p. 179-187Article in journal (Refereed) Published
Abstract [en]

Straightening of distorted components ater heat treatment is oten a necessary operation. he straightening operation leads to local plastic deformation, which is afecting the residual stress state, the hardness, and ultimately the fatigue strength of the component. he present study evaluates the inluence of a straightening operation on fatigue strength and on the residual stress state of induction hardened shats of steel EN 42CrMo4. A simpliied FEM model was formulated. he model showed that the residual stress state was asymmetric along the circumference of a straightened shat. Fatigue testing was performed in a three point bending and showed that the fatigue strength was reduced by up to some 20 % by heavy straightening. A fracture mechanics model for fatigue crack growth and arrest was developed. he model could be used to predict the fatigue strength of a straightened shat provided that the residual stress state was known. 

Place, publisher, year, edition, pages
Carl Hanser Verlag , 2012. Vol. 67, no 3, p. 179-187
Keywords [en]
42CrMo4, Fatigue crack growth and arrest, Fatigue strength, Fracture mechanics, Induction hardening, Residual stress, Straightening, Fatigue crack propagation, Hardening, Residual stresses, Cracks, Distorted components, FEM models, Fracture mechanics model, Local plastic deformation, Residual stress state, Three point bending, Fatigue crack growth and arrests, Fatigue testing
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41138Scopus ID: 2-s2.0-84864712982OAI: oai:DiVA.org:ri-41138DiVA, id: diva2:1377256
Available from: 2019-12-11 Created: 2019-12-11 Last updated: 2019-12-11Bibliographically approved

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