Strain localization and dynamic recrystallization in polycrystalline metals: Thermodynamic theory and simulation framework
Journal Article
·
· International Journal of Plasticity
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics
We describe a theoretical and computational framework for adiabatic shear banding (ASB) and dynamic recrystallization (DRX) in polycrystalline materials. The Langer-Bouchbinder-Lookman (LBL) thermodynamic theory of polycrystalline plasticity, which we recently reformulated to describe DRX via the inclusion of the grain boundary density or the grain size as an internal state variable, provides a convenient and self-consistent way to represent the viscoplastic and thermal behavior of the material, with minimal ad-hoc assumptions regarding the initiation of yielding or onset of shear banding. Here, we implement the LBL-DRX theory in conjunction with a finite-element computational framework. Favorable comparison to experimental measurements on a top-hat AISI 316L stainless steel sample compressed with a split-Hopkinson pressure bar suggests the accuracy and usefulness of the LBL-DRX framework, and demonstrates the crucial role of DRX in strain localization.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1504652
- Alternate ID(s):
- OSTI ID: 1636875
- Report Number(s):
- LA-UR--18-27644
- Journal Information:
- International Journal of Plasticity, Journal Name: International Journal of Plasticity Vol. 119; ISSN 0749-6419
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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