A crystal plasticity model for body-centered cubic molybdenum: Experiments and simulations
Abstract
Here, a physics-based finite strain crystal plasticity constitutive model for body-centered-cubic (BCC) single crystals is developed to capture the strong temperature, rate, and orientation dependence of mechanical behavior. The key features of the model include twinning-anti-twinning asymmetry of shearing resistance, a yield criterion that incorporates atomistics-informed non-Schmid effects, and a flow rule formulated based on the theory of thermally activated motion of screw dislocations via nucleation of double kinks. The implementation of the constitutive model in a finite-element program is briefly discussed. The material constants in the model are determined by calibrating the model against literature-based experimental data on single-crystal Molybdenum subjected to uniaxial compression and uniaxial tension. Experiments of uniaxial compression on a single crystal specimen with a hole were performed for validation of the calibrated model for BCC Molybdenum. Measurements of deformations in the vicinity of the hole were used to assess the ability of the model in predicting localized deformation patterns around the hole. Lastly, the model is able to effectively describe the anisotropic and temperature-dependent stress-strain response of a molybdenum crystal up to a homologous temperature of 0.3.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- General Electric Global Research Center, Bangalore (India)
- Texas A & M Univ., College Station, TX (United States)
- Indian Institute of Technology, Indore (India)
- Johns Hopkins Univ., Baltimore, MD (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1477662
- Report Number(s):
- LA-UR-18-24093
Journal ID: ISSN 0921-5093
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
- Additional Journal Information:
- Journal Volume: 738; Journal Issue: C; Journal ID: ISSN 0921-5093
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; bcc crystal plasticity, non-schrmid effect, molybdenum, finite element method
Citation Formats
Daphalapurkar, Nitin Pandurang, Patil, Swapnil, Nguyen, Thao, Eswar Prasad, Korimilli, and Ramesh, Kaliat. A crystal plasticity model for body-centered cubic molybdenum: Experiments and simulations. United States: N. p., 2018.
Web. doi:10.1016/j.msea.2018.09.099.
Daphalapurkar, Nitin Pandurang, Patil, Swapnil, Nguyen, Thao, Eswar Prasad, Korimilli, & Ramesh, Kaliat. A crystal plasticity model for body-centered cubic molybdenum: Experiments and simulations. United States. https://doi.org/10.1016/j.msea.2018.09.099
Daphalapurkar, Nitin Pandurang, Patil, Swapnil, Nguyen, Thao, Eswar Prasad, Korimilli, and Ramesh, Kaliat. Sat .
"A crystal plasticity model for body-centered cubic molybdenum: Experiments and simulations". United States. https://doi.org/10.1016/j.msea.2018.09.099. https://www.osti.gov/servlets/purl/1477662.
@article{osti_1477662,
title = {A crystal plasticity model for body-centered cubic molybdenum: Experiments and simulations},
author = {Daphalapurkar, Nitin Pandurang and Patil, Swapnil and Nguyen, Thao and Eswar Prasad, Korimilli and Ramesh, Kaliat},
abstractNote = {Here, a physics-based finite strain crystal plasticity constitutive model for body-centered-cubic (BCC) single crystals is developed to capture the strong temperature, rate, and orientation dependence of mechanical behavior. The key features of the model include twinning-anti-twinning asymmetry of shearing resistance, a yield criterion that incorporates atomistics-informed non-Schmid effects, and a flow rule formulated based on the theory of thermally activated motion of screw dislocations via nucleation of double kinks. The implementation of the constitutive model in a finite-element program is briefly discussed. The material constants in the model are determined by calibrating the model against literature-based experimental data on single-crystal Molybdenum subjected to uniaxial compression and uniaxial tension. Experiments of uniaxial compression on a single crystal specimen with a hole were performed for validation of the calibrated model for BCC Molybdenum. Measurements of deformations in the vicinity of the hole were used to assess the ability of the model in predicting localized deformation patterns around the hole. Lastly, the model is able to effectively describe the anisotropic and temperature-dependent stress-strain response of a molybdenum crystal up to a homologous temperature of 0.3.},
doi = {10.1016/j.msea.2018.09.099},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = C,
volume = 738,
place = {United States},
year = {Sat Sep 29 00:00:00 EDT 2018},
month = {Sat Sep 29 00:00:00 EDT 2018}
}
Web of Science
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Works referencing / citing this record:
Predicting the Tensile Behavior of Ti-6.6Al-3.3Mo-1.8Zr-0.29Si Alloy via the Temperature-Dependent Crystal Plasticity Method
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