About this Abstract |
Meeting |
6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
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Symposium
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6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
|
Presentation Title |
ExtremeMat: Towards Microstructure and Composition Sensitive Models for the Creep Deformation of Engineering Steels |
Author(s) |
Laurent Capolungo, R. Lebensohn, A. Kumar, B. Beets, A. Chakraborty, V. Prithivirajan, M. Gao, M. Glazoff, Y. Yamamoto, M.P. Brady |
On-Site Speaker (Planned) |
Laurent Capolungo |
Abstract Scope |
Structural steels utilized for power generation applications are subjected to particularly complex loading conditions (e.g. stresses, temperatures). Further, with the penetration of renewable into the grid, these are expected to enable flexible operations. A robust knowledge of the evolution of the performance steels, both austenitic and ferritic, with service conditions relies on the degree to which one can establish firm bridges between the microstructure, composition and material performance: such is one of the primary goals of the consortium ExtremeMat. In this presentation, focus will be placed on detailing recent advances made by the consortium in what concerns the development and validation of advance polycrystalline creep models applied to a model engineering austenitic steel: 347H. Among others, leveraging the elastic viscoplastic Fast Fourier Transform polycrystal mechanical solver, a mechanistic constitutive model sensitive to the dislocation content, arrangement, interstitial and substitutional solute content, precipitate content and types will be introduced. In parallel, a detailed analysis of the precipitate formation and evolution processes will be presented and rationalized on the basis of density functional theory simulations. By applying the model against experimental data (i.e. tensile tests, creep tests) gather within the course of this project, the complex role played by solute vs precipitate strengthening processes will be discussed. |
Proceedings Inclusion? |
Definite: Other |