Journal
STRAIN
Volume 52, Issue 4, Pages 324-335Publisher
WILEY-BLACKWELL
DOI: 10.1111/str.12193
Keywords
A319; digital volume correlation; fatigue; high temperature; in situ synchrotron X-ray tomography
Funding
- ANR (Agence Nationale de la Recherche) MatetPro project INDiANA [ANR-12RMNP-0011]
- International Campus on Safety and Intermodality in Transportation (CISIT)
- Nord-Pas-de-Calais Region
- European Community
- National Center for Scientific Research
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The aim of this work is to analyse the strain field heterogeneity in an aluminium alloy subjected to low-cycle fatigue at high temperature. In the cylinder heads produced by a lost-foam casting process, the microstructure of the studied alloy consists hard intermetallic phases and large gas and microshrinkage pores. In order to study the influence of this complex 3D microstructure on fatigue crack initiation and propagation at 250 degrees C, an experimental protocol using laboratory and synchrotron tomography, finite element simulation and a new digital volume correlation platform have been used. The results showed the role of pores in the crack nucleation and highlighted the importance of hard phases in the crack propagation, thanks to the resolution on the DVC measurement.
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