Yielding transitions and grain-size effects in dislocation theory
Abstract
The statistical-thermodynamic dislocation theory developed in previous papers is used in this paper in an analysis of yielding transitions and grain-size effects in polycrystalline solids. Calculations are based on the 1995 experimental results of Meyers, Andrade, and Chokshi [Metall. Mater. Trans. A 26, 2881 (1995)] for polycrystalline copper under strain-hardening conditions. The main assertion is that the well-known Hall-Petch effects are caused by enhanced strengths of dislocation sources at the edges of grains instead of the commonly assumed resistance to dislocation flow across grain boundaries. Finally, the theory describes rapid transitions between elastic and plastic deformation at yield points; thus it can be used to predict grain-size dependence of both yield stresses and flow stresses.
- Authors:
-
- Univ. of California, Santa Barbara, CA (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Univ. of California, Santa Barbara, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1352806
- Alternate Identifier(s):
- OSTI ID: 1349970
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review E
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 3; Journal ID: ISSN 2470-0045
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Langer, J. S. Yielding transitions and grain-size effects in dislocation theory. United States: N. p., 2017.
Web. doi:10.1103/PhysRevE.95.033004.
Langer, J. S. Yielding transitions and grain-size effects in dislocation theory. United States. https://doi.org/10.1103/PhysRevE.95.033004
Langer, J. S. Fri .
"Yielding transitions and grain-size effects in dislocation theory". United States. https://doi.org/10.1103/PhysRevE.95.033004. https://www.osti.gov/servlets/purl/1352806.
@article{osti_1352806,
title = {Yielding transitions and grain-size effects in dislocation theory},
author = {Langer, J. S.},
abstractNote = {The statistical-thermodynamic dislocation theory developed in previous papers is used in this paper in an analysis of yielding transitions and grain-size effects in polycrystalline solids. Calculations are based on the 1995 experimental results of Meyers, Andrade, and Chokshi [Metall. Mater. Trans. A 26, 2881 (1995)] for polycrystalline copper under strain-hardening conditions. The main assertion is that the well-known Hall-Petch effects are caused by enhanced strengths of dislocation sources at the edges of grains instead of the commonly assumed resistance to dislocation flow across grain boundaries. Finally, the theory describes rapid transitions between elastic and plastic deformation at yield points; thus it can be used to predict grain-size dependence of both yield stresses and flow stresses.},
doi = {10.1103/PhysRevE.95.033004},
journal = {Physical Review E},
number = 3,
volume = 95,
place = {United States},
year = {Fri Mar 24 00:00:00 EDT 2017},
month = {Fri Mar 24 00:00:00 EDT 2017}
}
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Works referencing / citing this record:
Understanding the mechanisms of amorphous creep through molecular simulation
journal, December 2017
- Cao, Penghui; Short, Michael P.; Yip, Sidney
- Proceedings of the National Academy of Sciences, Vol. 114, Issue 52