Hall-Petch analysis for temperature and strain rate dependent deformation of polycrystalline lead |
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| Authors: | V E Panin R W Armstrong |
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| Institution: | 1.Institute of Strength Physics and Materials Science, Siberian Branch,Russian Academy of Sciences,Tomsk,Russia;2.Center for Engineering Concepts Development, Department of Mechanical Engineering,University of Maryland,College Park,USA |
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| Abstract: | A dislocation pile-up analysis of the Hall-Petch constant k ε for the tensile deformation of polycrystalline lead over a wide range of temperature T and at two strain rates has been made. The predicted and experimental Hall-Petch dependencies k ε 2 = f (T) are in good agreement. Lower than predicted k ε values at very low temperatures are attributed to the high curvature of grain boundaries which experience high localized plasticity and consequent shear banding. |
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