Hall-Petch analysis for temperature and strain rate dependent deformation of polycrystalline lead

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.

Original language	English
Pages (from-to)	35-40
Number of pages	6
Journal	Physical Mesomechanics
Volume	19
Issue number	1
DOIs	https://doi.org/10.1134/S1029959916010045
Publication status	Published - 1 Jan 2016

Keywords

agreement between theoretical and experimental Hall-Petch dependencies
crystal lattice curvature
dislocation pile-up analysis
polycrystalline lead
shear band development

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Surfaces and Interfaces

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10.1134/S1029959916010045

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title = "Hall-Petch analysis for temperature and strain rate dependent deformation of polycrystalline lead",

abstract = "A dislocation pile-up analysis of the Hall-Petch constant kε 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 kε 2 = f (T) are in good agreement. Lower than predicted kε values at very low temperatures are attributed to the high curvature of grain boundaries which experience high localized plasticity and consequent shear banding.",

keywords = "agreement between theoretical and experimental Hall-Petch dependencies, crystal lattice curvature, dislocation pile-up analysis, polycrystalline lead, shear band development",

author = "Panin, {V. E.} and Armstrong, {R. W.}",

year = "2016",

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AB - A dislocation pile-up analysis of the Hall-Petch constant kε 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 kε 2 = f (T) are in good agreement. Lower than predicted kε 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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KW - crystal lattice curvature

KW - dislocation pile-up analysis

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KW - shear band development

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