About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation and Damage Mechanisms of High Temperature Alloys
|
Presentation Title |
Investigating the Role of Dynamic Strain Aging in 347H Steel Using Crystal Plasticity |
Author(s) |
Veerappan Prithivirajan, M Arul Kumar, Bjorn Clausen, Ricardo Lebensohn, Laurent Capolungo |
On-Site Speaker (Planned) |
Veerappan Prithivirajan |
Abstract Scope |
Dynamic strain aging (DSA) is a process in which solute atoms diffuse towards the mobile dislocations, temporarily pinned at the obstacles. Under certain conditions of strain rate and temperature, DSA causes jerky motion on the dislocations, which can manifest into unusual macroscopic responses like the anomalous yield strength dependence with temperature, negative strain rate sensitivity, serrated yielding, etc. In this work, we develop a physics-based constitutive model for DSA within the crystal plasticity modeling framework to capture its effect on mechanical behavior. We performed in-situ neutron diffraction experiments on 347H steel under uniaxial tension with stress hold to validate our DSA model. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, ICME |