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


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), pp. 1135-1145. (doi:10.1016/S0142-1123(03)00148-8).

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Description/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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/S0142-1123(03)00148-8
ISSNs: 0142-1123 (print)
Keywords: al bearing alloys, statistical microstructural characterisation, fatigue crack initiation, finite body tessellation
Subjects:

ePrint ID: 22424
Date :
Date Event
2003Published
Date Deposited: 23 Mar 2006
Last Modified: 16 Apr 2017 22:50
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/22424

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