Journal
SCRIPTA MATERIALIA
Volume 113, Issue -, Pages 254-258Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.11.017
Keywords
Tomography; Fatigue; High-temperature; Aluminum alloy; Cracks
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Funding
- French National Research Agency through the ANR project INDIANA [ANR-12-RMNP-0011]
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Fatigue tests were performed at 250 degrees C on a cast AlSi7Cu3Mg aluminum alloy and monitored with Synchrotron in situ X-ray tomography in order to understand the micro-mechanisms of crack initiation and propagation. The analysis of the 3D images reveals that internal shrinkage pores are responsible for the main crack initiation. Crack propagation is mainly due to the complex and highly interconnected network of hard particles of the eutectic regions. (C) 2015 Elsevier Ltd. All rights reserved.
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