Phase-field simulation of self-healing AlMg alloy
(2023) 3rd International Workshop on Plasticity, Damage and Failure of Engineering Materials 2023 (IWPDF 2023) — Location: Istanbul, Turkey (4.October.2023)
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- Abstract
- The AlMg alloys are widely used in different transportation industries due to their excellent strength-to-weight ratio [1]. In these industries, the components must withstand overloads and a high number of loading cycles [2], which, over time, can generate damage in the materials and in the worst-case failure [3]. To increase the lifetime of these parts, one innovative solution is to use self-healing materials. There exist different types of self-healing methods, one of them is the diffusion self-healing mechanism. In this mechanism, the alloy microstructure is composed of a healing agent in solid solution [4]. After damage, a healing heat treatment triggers the diffusion of this healing agent towards the voids and heals the material. An in-situ Diffusion Healing Heat Treatment at 400 °C was applied to heal a damaged AlMg alloy at the European Synchrotron Radiation Facility (ESRF) [5], where nano-holotomographies (nano-CT) of the damaged and healed microstructure evidenced the healing capacity of the alloy by diffusion mechanism with a voxel size of 35 nm. A diffusion phase-field model based on Kim-Kim-Suzuki [6] was applied to predict the microstructure evolution of the material during this healing heat treatment. The results obtained with the phase-field model are compared with the experimental measurements to corroborate their accuracy.The AlMg alloys are widely used in different transportation industries due to their excellent strength-to-weight ratio [1]. In these industries, the components must withstand overloads and a high number of loading cycles [2], which, over time, can generate damage in the materials and in the worst-case failure [3]. To increase the lifetime of these parts, one innovative solution is to use self-healing materials. There exist different types of self-healing methods, one of them is the diffusion self-healing mechanism. In this mechanism, the alloy microstructure is composed of a healing agent in solid solution [4]. After damage, a healing heat treatment triggers the diffusion of this healing agent towards the voids and heals the material. An in-situ Diffusion Healing Heat Treatment at 400 °C was applied to heal a damaged AlMg alloy at the European Synchrotron Radiation Facility (ESRF) [5], where nano-holotomographies (nano-CT) of the damaged and healed microstructure evidenced the healing capacity of the alloy by diffusion mechanism with a voxel size of 35 nm. A diffusion phase-field model based on Kim-Kim-Suzuki [6] was applied to predict the microstructure evolution of the material during this healing heat treatment. The results obtained with the phase-field model are compared with the experimental measurements to corroborate their accuracy.
- Affiliations
University of Liège UEE Research Unit, MSM division University of Liège Ecole Polytechnique Fédérale de Lausanne Laboratory of Mechanical Metallurgy ESRF The European Synchrotron
Citations
Sepúlveda de la Fuente, H., Fetni, S., Delahaye, J., Gheysen, J., De Raedemacker, S., Villanova, J., Duchêne, L., Simar, A., & Habraken, A.-M. (2023). Phase-field simulation of self-healing AlMg alloy. 3rd International Workshop on Plasticity, Damage and Failure of Engineering Materials 2023 (IWPDF 2023), Istanbul, Turkey. https://hdl.handle.net/2078.5/101133