MATEC Web of Conferences
Volume 12, 2014FDMD II - JIP 2014 - Fatigue Design & Material Defects
|Number of page(s)||2|
|Section||Session 5: DVM/SF2M Evaluation of Constructional Manufacturing Defects with Regard to Structural Fatigue|
|Published online||09 June 2014|
Probabilistic thermal-mechanical fatigue criterion for lost foam casting aluminium alloys based on 2D/3D porosities distribution
1 PSA Peugeot Citroën, Route de Gisy, 78643 Vélizy-Villacoublay, France
2 LML, Ecole Centrale de Lille Cité Scientifique 59650 Villeneuve d'Ascq, France
3 PSA Peugeot Citroën, Rue des Fauvelles, 92256 La Garenne Colombes, France
4 MATEIS, INSA Lyon, 69621 Villeurbanne Cedex, France
a Corresponding author: firstname.lastname@example.org
A thermal-mechanical fatigue criterion is proposed to assess the lifetime of aluminium alloys produced by a lost foam casting process. It is based on the observed size distribution of pores sizes which are considered as critical zones for cracks initiation and gives reliable results when both pores sizes are identified from X-ray tomography and mean stresses are taken into account. Lifetime probabilities are finally successfully compared with experimental results.
© Owned by the authors, published by EDP Sciences, 2014
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