MATEC Web of Conferences
Volume 12, 2014FDMD II - JIP 2014 - Fatigue Design & Material Defects
|Number of page(s)||3|
|Section||Session 5: DVM/SF2M Evaluation of Constructional Manufacturing Defects with Regard to Structural Fatigue|
|Published online||09 June 2014|
Surface defects created by the forging process and their effects on the fatigue performance of a 6082 Al-alloy
Jaguar Land Rover Ltd, Abbey Road, Whitley, Coventry CV3 4LF, UK
The increasing use of forged Al-alloy components in automotive vehicles has generated a large quantity of data which shows that a retained forged surface can have a significantly detrimental effect on fatigue performance. Extensive SEM studies of the fatigue crack initiation sites on four point bend S-N samples and the as-forged surface appearance of these and actual components have been undertaken. The results from these studies have shown common features across all the samples examined. These features, rather than the surface roughness, can be associated with multiple fatigue crack initiation sites and explain the observed reduction in fatigue properties.
© Owned by the authors, published by EDP Sciences, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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