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Fatigue crack growth and closure in fine-grained aluminium alloys

Record type: Article

The effects of microstructure on fatigue crack growth rate and fracture mechanism have been examined for several relatively fine-grained/high dispersoid aluminium alloys. Particular attention has been paid to the behaviour of spraycast Al-Li alloys, as such materials may present novel property combinations for light weight structural aerospace applications, with extended conventional composition ranges. Fracture resistance has been assessed in terms of both intrinsic and extrinsic factors, including roughness induced closure (RICC). In these fine-grained/high dispersoid materials, high crack growth rates are typically seen in comparison to traditional DC cast alloys, consistent with low fracture surface roughness levels and correspondingly reduced levels of RICC. The competitive influence of shearable precipitates on crack roughness is however noted in a high-Li alloy variant. The effects of fracture surface roughness and closure levels on long crack fatigue crack growth rates have been compared with recent novel modelling of closure levels.

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Citation

Venning, L., Hogg, S.C., Sinclair, I. and Reed, P.A.S. (2006) Fatigue crack growth and closure in fine-grained aluminium alloys Materials Science and Engineering: A, 428, (1-2), pp. 247-255. (doi:10.1016/j.msea.2006.05.020).

More information

Published date: 2006
Keywords: fatigue, closure, spray formed aluminium, dispersoids
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 43084
URI: http://eprints.soton.ac.uk/id/eprint/43084
ISSN: 0921-5093
PURE UUID: 200c7a66-0c88-4827-8dd6-bdcc003867b2
ORCID for P.A.S. Reed: ORCID iD orcid.org/0000-0002-2258-0347

Catalogue record

Date deposited: 10 Jan 2007
Last modified: 17 Jul 2017 15:19

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Contributors

Author: L. Venning
Author: S.C. Hogg
Author: I. Sinclair
Author: P.A.S. Reed ORCID iD

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