Fatigue Behaviour in Fine Grained Aluminium Alloys

Abstract:

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The effects of alloy production method on microstructure and hence fatigue crack growth rate and fracture mechanism have been examined for a variety of fine-grained/high dispersoid Al-Li-Mg-Zr and Al-Li-Cu-Mg-Zr alloys. Microstructures have been assessed by scanning and transmission electron microcopy, together with electron back scattered diffraction pattern assessment. In these fine-grained/high dispersoid materials, high crack growth rates are seen in comparison to the traditional DC cast alloys, excepting a material with high volume fraction of shearable precipitate. The effects of fracture surface roughness and closure levels in determining crack growth rates has been assessed.

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Edited by:

W.J. Poole, M.A. Wells and D.J. Lloyd

Pages:

1077-1082

DOI:

10.4028/www.scientific.net/MSF.519-521.1077

Citation:

L.J. Venning et al., "Fatigue Behaviour in Fine Grained Aluminium Alloys", Materials Science Forum, Vols. 519-521, pp. 1077-1082, 2006

Online since:

July 2006

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Price:

$35.00

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