An overview: fatigue behaviour of ultrafine-grained metals and alloys (in issue on fatigue lifetime prediction of metals based on microstructural behaviour)


Höppel, H.W., Kautz, M., Xu, C., Murashkin, M., Langdon, T.G., Valiev, R.Z. and Mughrabi, H. (2006) An overview: fatigue behaviour of ultrafine-grained metals and alloys (in issue on fatigue lifetime prediction of metals based on microstructural behaviour). International Journal of Fatigue, 28, (0142-1123), 1001-1010. (doi:10.1016/j.ijfatigue.2005.08.014).

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Description/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.

Item Type: Article
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Keywords: ultrafine-grained materials, AA6061; α-brass, copper, aluminium, ECAP, fatigue life, annealing, modelling
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 43661
Date Deposited: 25 Jan 2007
Last Modified: 27 Mar 2014 18:28
URI: http://eprints.soton.ac.uk/id/eprint/43661

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