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Villanova, J.
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Publications (4/4 displayed)
- 2023Phase-field simulation of self-healing AlMg alloy
- 2022Elementary growth mechanisms of creep cavities in AZ31 alloy revealed by in situ X-ray nano-tomographycitations
- 2019Liquid–liquid phase separation morphologies in ultra-white beetle scales and a synthetic equivalentcitations
- 2019Liquid–liquid phase separation morphologies in ultra-white beetle scales and a synthetic equivalentcitations
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document
Phase-field simulation of self-healing AlMg alloy
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.