Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7172049 | International Journal of Fatigue | 2015 | 24 Pages |
Abstract
In this study, the very high cycle fatigue tests were conducted on a kind of high-strength austempered ductile iron (ADI) at 90Â Hz and 20Â kHz. The S-N curves decrease continuously and there is no fatigue limit in the very high cycle fatigue regime. The fatigue strength of the different frequencies essentially corresponds with each other and the specimens show similar fracture behaviors. Meanwhile, on the fracture surfaces of some specimens, the 'granular-bright-facet' (GBF) area is observed. The threshold stress intensity factor for internal crack growth is obtained and the fatigue limit is evaluated based on the defect size.
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Authors
Jiwang Zhang, Qingpeng Song, Ning Zhang, Liantao Lu, Mintang Zhang, Guodong Cui,