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Microstructural characterisation of fatigue crack initiation in Al-based plain bearing alloys

Microstructural characterisation of fatigue crack initiation in Al-based plain bearing alloys
Microstructural characterisation of fatigue crack initiation in Al-based plain bearing alloys
The fatigue initiation behaviour of two Al-based bearing lining alloys has been assessed by image analysis tessellation techniques and subsequent adaptive numerical classification approaches. Fatigue initiation occurs by decohesion at Si particles, and in the absence of Si particles decohesion occurs at Sn particles. In both cases, relatively unclustered, large particles initiate fatigue, and the relative position of the nearest neighbour particle seems to have significance. This can be explained qualitatively in terms of strain mismatch arising from differing elastic moduli between the particles and surrounding Al matrix and local stress concentration and superposition effects. The lining alloy containing no Si and high Sn content exhibits more directionality, and a heavier dependence on angular information is found by the classifier.
al bearing alloys, statistical microstructural characterisation, fatigue crack initiation, finite body tessellation
0142-1123
1135-1145
Mwanza, M.C.
8fc96cc4-1f1b-49b3-8030-53094e3ec8e9
Joyce, M.R.
e294d1ba-c37a-4149-b9c0-15095d643d3b
Lee, K.K.
9fec08f0-7782-4d2e-9313-73ed74fd8d53
Syngellakis, S.
1279f4e2-97ec-44dc-b4c2-28f5ac9c2f88
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Mwanza, M.C.
8fc96cc4-1f1b-49b3-8030-53094e3ec8e9
Joyce, M.R.
e294d1ba-c37a-4149-b9c0-15095d643d3b
Lee, K.K.
9fec08f0-7782-4d2e-9313-73ed74fd8d53
Syngellakis, S.
1279f4e2-97ec-44dc-b4c2-28f5ac9c2f88
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17

Mwanza, M.C., Joyce, M.R., Lee, K.K., Syngellakis, S. and Reed, P.A.S. (2003) Microstructural characterisation of fatigue crack initiation in Al-based plain bearing alloys. International Journal of Fatigue, 25 (9-11), 1135-1145. (doi:10.1016/S0142-1123(03)00148-8).

Record type: Article

Abstract

The fatigue initiation behaviour of two Al-based bearing lining alloys has been assessed by image analysis tessellation techniques and subsequent adaptive numerical classification approaches. Fatigue initiation occurs by decohesion at Si particles, and in the absence of Si particles decohesion occurs at Sn particles. In both cases, relatively unclustered, large particles initiate fatigue, and the relative position of the nearest neighbour particle seems to have significance. This can be explained qualitatively in terms of strain mismatch arising from differing elastic moduli between the particles and surrounding Al matrix and local stress concentration and superposition effects. The lining alloy containing no Si and high Sn content exhibits more directionality, and a heavier dependence on angular information is found by the classifier.

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Published date: 2003
Keywords: al bearing alloys, statistical microstructural characterisation, fatigue crack initiation, finite body tessellation

Identifiers

Local EPrints ID: 22424
URI: http://eprints.soton.ac.uk/id/eprint/22424
ISSN: 0142-1123
PURE UUID: 0c1e5ba6-f9ae-4393-a2e3-e06ebfbbe53d
ORCID for P.A.S. Reed: ORCID iD orcid.org/0000-0002-2258-0347

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Date deposited: 23 Mar 2006
Last modified: 16 Mar 2024 02:44

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Contributors

Author: M.C. Mwanza
Author: M.R. Joyce
Author: K.K. Lee
Author: S. Syngellakis
Author: P.A.S. Reed ORCID iD

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