A crystal plasticity model incorporating the effects of precipitates in superalloys: Application to tensile, compressive, and cyclic deformation of Inconel 718
Abstract
An elasto-plastic polycrystal plasticity model is developed and applied to an Inconel 718 (IN718) superalloy that was produced by additive manufacturing (AM). The model takes into account the contributions of solid solution, precipitates shearing, and grain size and shape effects into the initial slip resistance. Non-Schmid effects and backstress are also included in the crystal plasticity model for activating slip. The hardening law for the critical resolved shear stress is based on the evolution of dislocation density. In using the same set of material and physical parameters, the model is compared against a suite of compression, tension, and large-strain cyclic mechanical test data applied in different AM build directions. We demonstrate that the model is capable of predicting the particularities of both monotonic and cyclic deformation to large strains of the alloy, including decreasing hardening rate during monotonic loading, the non-linear unloading upon the load reversal, the Bauschinger effect, the hardening rate change during loading in the reverse direction as well as plastic anisotropy and the concomitant microstructure evolution. It is anticipated that the general model developed here can be applied to other multiphase alloys containing precipitates.
- Authors:
-
- Univ. of New Hampshire, Durham, NH (United States). Dept. of Mechanical Engineering
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Turbocam Energy Solutions, Dover, NH (United States)
- Univ. of California, Santa Barbara, CA (United States). Mechanical Engineering Dept., Materials Dept.
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE; National Science Foundation (NSF)
- OSTI Identifier:
- 1396145
- Report Number(s):
- LA-UR-17-28453
Journal ID: ISSN 0749-6419
- Grant/Contract Number:
- AC52-06NA25396; CMMI-1728224
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Plasticity
- Additional Journal Information:
- Journal Volume: 99; Journal ID: ISSN 0749-6419
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Material Science
Citation Formats
Ghorbanpour, Saeede, Zecevic, Milovan, Kumar, Anil, Jahedi, Mohammad, Bicknell, Jonathan, Jorgensen, Luke, Beyerlein, Irene J., and Knezevic, Marko. A crystal plasticity model incorporating the effects of precipitates in superalloys: Application to tensile, compressive, and cyclic deformation of Inconel 718. United States: N. p., 2017.
Web. doi:10.1016/j.ijplas.2017.09.006.
Ghorbanpour, Saeede, Zecevic, Milovan, Kumar, Anil, Jahedi, Mohammad, Bicknell, Jonathan, Jorgensen, Luke, Beyerlein, Irene J., & Knezevic, Marko. A crystal plasticity model incorporating the effects of precipitates in superalloys: Application to tensile, compressive, and cyclic deformation of Inconel 718. United States. https://doi.org/10.1016/j.ijplas.2017.09.006
Ghorbanpour, Saeede, Zecevic, Milovan, Kumar, Anil, Jahedi, Mohammad, Bicknell, Jonathan, Jorgensen, Luke, Beyerlein, Irene J., and Knezevic, Marko. Thu .
"A crystal plasticity model incorporating the effects of precipitates in superalloys: Application to tensile, compressive, and cyclic deformation of Inconel 718". United States. https://doi.org/10.1016/j.ijplas.2017.09.006. https://www.osti.gov/servlets/purl/1396145.
@article{osti_1396145,
title = {A crystal plasticity model incorporating the effects of precipitates in superalloys: Application to tensile, compressive, and cyclic deformation of Inconel 718},
author = {Ghorbanpour, Saeede and Zecevic, Milovan and Kumar, Anil and Jahedi, Mohammad and Bicknell, Jonathan and Jorgensen, Luke and Beyerlein, Irene J. and Knezevic, Marko},
abstractNote = {An elasto-plastic polycrystal plasticity model is developed and applied to an Inconel 718 (IN718) superalloy that was produced by additive manufacturing (AM). The model takes into account the contributions of solid solution, precipitates shearing, and grain size and shape effects into the initial slip resistance. Non-Schmid effects and backstress are also included in the crystal plasticity model for activating slip. The hardening law for the critical resolved shear stress is based on the evolution of dislocation density. In using the same set of material and physical parameters, the model is compared against a suite of compression, tension, and large-strain cyclic mechanical test data applied in different AM build directions. We demonstrate that the model is capable of predicting the particularities of both monotonic and cyclic deformation to large strains of the alloy, including decreasing hardening rate during monotonic loading, the non-linear unloading upon the load reversal, the Bauschinger effect, the hardening rate change during loading in the reverse direction as well as plastic anisotropy and the concomitant microstructure evolution. It is anticipated that the general model developed here can be applied to other multiphase alloys containing precipitates.},
doi = {10.1016/j.ijplas.2017.09.006},
journal = {International Journal of Plasticity},
number = ,
volume = 99,
place = {United States},
year = {Thu Sep 14 00:00:00 EDT 2017},
month = {Thu Sep 14 00:00:00 EDT 2017}
}
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