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A. Tireira, G. Requena, H. Klocker, A. Borbély:
"3d Study Of Crack Propagation During Tensile Test In Alsi12 Cast Alloy Reinforced With Complex Shape Of Intermetallics";
Talk: PhotoMechanics 2013, Montpellier, France; 05-27-2013 - 05-29-2013; in: "International conference on full-field measurement techniques and their applications in experimental solid mechanics", (2013).

Cast eutectic AlSi12Ni alloys are used for automotive engines. The architecture of these alloys consists of
a ductile a-Al matrix and a rigid and brittle, long-range network of eutectic Si and primary aluminides with higher Young´s
modulus. This heterogeneity of the microstructure and the network morphology of the eutectic aluminides lead to stress
concentrations in the rigid particles, which during mechanical or thermal loading may break or result in debonding from
the matrix leading to void nucleation. The growth and coalescence of these voids in macro cracks lead to final failure.
In the present work, these damage mechanisms are characterized in situ by X-ray tomography. The experiment was
carried out on an AlSi12Ni alloy with different microstructural architecture characteristic obtained by solution treatment. To
our knowledge, this is the first work dedicated to in situ quantification of local damage evolution in an alloy with complex
microstructure. The shape evolution due to break-up of intermetallic particles during straining, as well as void growth and
coalescence are characterized. The results contribute to a better physical understanding of damage generation in complex
microstructures.