About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Tackling Structural Materials Challenges for Advanced Nuclear Reactors
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Presentation Title |
Multi-scale Modeling of the Mechanical Response of Structural Metals Subjected to Thermo-mechanical Loads and Irradiation: the Role of Microstructure. |
Author(s) |
Laurent Capolungo, Arul Kumar, Andrea Rovinelli, Ricardo Lebensohn |
On-Site Speaker (Planned) |
Laurent Capolungo |
Abstract Scope |
Structural metals considered for use in advanced nuclear reactors will be subjected to extreme environments leading to rapid and profound changes in the microstructure, and potentially of the composition, of the metal. Mechanistic models can be utilized to extrapolate the overall mechanical behavior of the material and work in unison with experiments to fully comprehend materials performance. The work to be presented introduces an advanced polycrystal modeling framework, applied both to the case of ferritic and austenitic steels, that can simultaneously predict the overall tensile and creep response (primary secondar and tertiary) of representative materials volumes. Uniquely the constitutive model captures the absolute and relative contributions of a vast array of deformation mechanism (e.g. dislocation glide, dislocation climb, point defect diffusion mediated plasticity) as a function of the fingerprint of the microstructure -such is defined by the dislocation content, arrangement, solute, non-equilibrium point defect and precipitate content-. |