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Please use this identifier to cite or link to this item: http://dspace.lib.cranfield.ac.uk/handle/1826/7641

Document Type: Article
Title: Size effects on residual stress and fatigue crack growth in friction stir welded 2195-T8 aluminium - Part I: Experiments
Authors: Ma, Yu E.
Staron, P.
Fischer, T.
Irving, Phil E.
Issue Date: 2011
Citation: Yu E. Ma, P. Staron, T. Fischer, P.E. Irving, Size effects on residual stress and fatigue crack growth in friction stir welded 2195-T8 aluminium - Part I: Experiments, International Journal of Fatigue, Volume 33, Issue 11, November 2011, Pages 1417–1425.
Abstract: Residual stress fields were measured in three different sizes of Compact-Tension (C(T)) and eccentrically loaded single edge notch (ESE(T)) specimens containing transverse or longitudinal welds. The effect of size on residual stress profiles was studied. Fatigue crack growth tests were carried out with cracks growing into or away from the weld line, as well as growing along the weld centre line. Effects of weld residual stresses on fatigue crack growth rates parallel and perpendicular to the friction stir welds were studied. It was found that compressive residual stresses around the sample notch had significant retarding effects on both crack initiation and crack growth rates for cracks growing towards the weld line. Effects of residual stress on crack growth rates declined with increasing crack length. When cracks grew parallel to the weld line in C(T) samples the crack growth rate was around 20% lower than in parent material.
URI: http://dx.doi.org/10.1016/j.ijfatigue.2011.05.006
Appears in Collections:Staff publications - School of Applied Sciences

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