About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales III
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Presentation Title |
Physics-based Full-Field Fast Fourier Transform Modeling of Creep Behavior: Application to 347H Steel |
Author(s) |
Arul Kumar Mariyappan, Ricardo Lebensohn, Laurent Capolungo |
On-Site Speaker (Planned) |
Arul Kumar Mariyappan |
Abstract Scope |
Austenitic stainless-steels are widely used in energy sectors including nuclear and fossil industries for many engineering components, and mostly operating at high temperature regime. Developing a numerical framework to capture creep and strain hardening behavior of steels is important to predict the life and certify the materials for desired applications. In this work, a mechanistic constitutive model with explicit stress and temperature dependence is developed and implemented within a full-field elasto-visco-plastic Fast Fourier Transform (EVPFFT) framework. Thermally-activated glide and climb of dislocations, and vacancy diffusional creep mechanisms are considered. Using this framework, uniaxial stress-strain responses and thermal creep responses of 347H stainless steel as a function of temperature are simulated. The model predicted results are validated against the experimental measurements and the relative roles of the different deformation mechanisms (dislocation glide, climb and diffusional creep) are discussed. |