Orientation-dependence of Fatigue-accelerated Creep in Aluminium Single Crystals


THE character of some of the creep-fatigue interactions in metals can be extremely complex, as reviews of the subject reveal1,2. The fact that creep rates of relatively pure metals, such as lead3, copper4 and zinc5, are significantly accelerated by a superimposed fatigue stress is nevertheless well established. A sound explanation for the effect, and its associated features, is not easily advanced without more fundamental information, particularly in respect of the behaviour of single crystals. While some effects in single crystals have been examined (fatigue-activated recovery6, for example), no examination of fatigue-activated creep in single crystals appears to have been published so far. The purpose of this communication is to report some initial results derived from experiments on aluminium single crystals in which particular emphasis has been given to the orientation-dependence of fatigue-accelerated creep.

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KENNEDY, A., MCGILL, N. Orientation-dependence of Fatigue-accelerated Creep in Aluminium Single Crystals. Nature 207, 1086–1087 (1965). https://doi.org/10.1038/2071086a0

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