Publication details

Investigation of the failure mechanisms of Zr alloy with Cr2AlC coatings using in-situ bending tests: Experiments and simulations

Authors

PAN Boyu SHEN Fuhui FEKETE Matej RAMESH Devi Janani SCHNEIDER Jochen MÜNSTERMANN Sebastian

Year of publication 2024
Type Article in Periodical
Magazine / Source Engineering Failure Analysis
MU Faculty or unit

Faculty of Science

Citation
web https://www.sciencedirect.com/science/article/pii/S1350630724010100?via%3Dihub
Doi http://dx.doi.org/10.1016/j.engfailanal.2024.108964
Keywords Failure mechanism; Zirconium; MAX phase; Finite element; Failure criterion
Description The failure mechanisms of Cr2AlC-coated zirconium samples under different mechanical loading conditions have been investigated by combining in-situ bending tests and finite element simulations. The results of interrupted in-situ bending tests reveal that new critical cracks are mainly initiated in the Cr2AlC coating layer, followed by subsequent propagation into the Zr substrate with increasing plastic deformation. The formation of new critical cracks in Cr2AlC material is described using the maximum principal stress criterion. A stress state-dependent damage mechanics model combined with an advanced plasticity model is used to capture the ductile fracture behavior of the Zr substrate. Finite element simulations have been performed to identify the failure properties of coating and substrate materials, leading to the accurate reproduction of experimental fracture behavior.
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