| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 781782 | International Journal of Fatigue | 2006 | 10 Pages |
Abstract
The objectives of the present study were to assess and to optimize the fatigue behaviour in strain-controlled tests of different ultrafine-grained (UFG) metals and alloys (Cu, Al, AA6061, α-brass) prepared by equal channel angular pressing (ECAP). Quite generally, the UFG materials investigated exhibited shorter fatigue lives in the low-cycle fatigue (LCF) regime than corresponding conventional grain (CG) size specimens. In all cases, the fatigue lives could be enhanced appreciably by a suitable heat treatment following ECAP without, however, paralleling the fatigue lives of the CG specimens. The microstructural reasons for this behaviour are discussed, and a microstructure-based fatigue life model for UFG materials is presented.
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Authors
H.W. Höppel, M. Kautz, C. Xu, M. Murashkin, T.G. Langdon, R.Z. Valiev, H. Mughrabi,