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Propagation of physically short cracks in a bainitic high strength bearing steel due to fatigue load
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
2016 (English)In: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, Vol. 90, 166-180 p.Article in journal (Refereed) PublishedText
Abstract [en]

Physically short cracks in a bainitic high strength bearing steel were fatigue loaded. The rapid propagation rate of early open short cracks agreed with that of long closure free cracks. After some rapid growth, the short cracks entered a transition period to the rate of growth limited long cracks. Potential drop showed that the short cracks were open to the tip throughout the growth sequence, which excluded crack face closure in the wake as the growth limiting mechanism in this material. Instead the short crack effect was related to residual stresses and other mechanisms at the crack tip. Crack manufacturing procedures were determined for straight long and short start cracks in the present material. LEFM with effective material parameters and limit compensation predicted the short crack lives.

Place, publisher, year, edition, pages
2016. Vol. 90, 166-180 p.
Keyword [en]
Fatigue crack experiment, Short crack growth, Crack closure, Life prediction, Potential drop
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-189784DOI: 10.1016/j.ijfatigue.2016.04.031ISI: 000378442400017ScopusID: 2-s2.0-84965179998OAI: oai:DiVA.org:kth-189784DiVA: diva2:949571
Note

QC 20160721

Available from: 2016-07-21 Created: 2016-07-15 Last updated: 2016-07-21Bibliographically approved

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Alfredsson, BoÖberg, Martin
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