期刊
PHYSICAL MESOMECHANICS
卷 19, 期 1, 页码 35-40出版社
SPRINGER
DOI: 10.1134/S1029959916010045
关键词
dislocation pile-up analysis; polycrystalline lead; agreement between theoretical and experimental Hall-Petch dependencies; crystal lattice curvature; shear band development
A dislocation pile-up analysis of the Hall-Petch constant k (epsilon) 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 (epsilon) (2) = f (T) are in good agreement. Lower than predicted k (epsilon) 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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