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Logo: ZFM – Zentrum für Festkörperchemie und Neue Materialien
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Logo: ZFM – Zentrum für Festkörperchemie und Neue Materialien
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Evolution of Fatigue Damage, Cyclic Slip Irreversibility and Fatigue Life

The origins of fatigue crack initiation and damage evolution in different metallic materials are reviewed with emphasis on the responsible microstructural mechanisms that occur during the stages of cyclic deformation which precede the onset of fatigue damage. Different types of cyclic slip irreversibilities that eventually lead to the initiation of fatigue cracks are discussed. Examples of trans- and intercrystalline fatigue damage evolution in the low cycle, high cycle and ultrahigh cycle fatigue regimes in mono- and polycrystalline metals and alloys and in different engineering materials are presented. Some microstructural models of fatigue crack initiation and early fatigue growth are discussed, and examples of the factors that control fatigue lives are reviewed.

[1]: H. Mughrabi: "Dislocations in fatigue". In: "Dislocations and Properties of Real Materials" (Conf. Proc.), Book No. 323, The Institute of Metals, London, 1984, p. 244-262.

[2]: H. Mughrabi: "Cyclic slip irreversibilities and the evolution of fatigue damage." Metall. Mater. Trans. A 200940 1257.

[3]: H. Mughrabi: Cyclic slip irreversibility and fatigue life: a microstructure-based analysis. Acta materialia 201361, 1197.