New perspectives on the grain-size dependent yield strength of polycrystalline metals

We formulate the grain-size dependent strengthening of polycrystalline metals as a multiplicative decomposition of the coarse-grain strength σ0 and a function depending on the grain size d normalized by a characteristic coarse-grain length scale L = b(G/σ0), where G is the shear modulus, and b the m...

Full description

Saved in:
Bibliographic Details
Published in:Scripta materialia 2019-06, Vol.166, p.149-153
Main Authors: Di Leo, Claudio V., Rimoli, Julian J.
Format: Article
Language:English
Subjects:
Hall-Petch effect
Metal and alloys
Microstructure
Plasticity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We formulate the grain-size dependent strengthening of polycrystalline metals as a multiplicative decomposition of the coarse-grain strength σ0 and a function depending on the grain size d normalized by a characteristic coarse-grain length scale L = b(G/σ0), where G is the shear modulus, and b the magnitude of the Burgers vector. We show that this formulation leads to a collapse of all experimental data analyzed, making experimental results across different materials comparable. This suggests that the grain-size dependent strengthening of several materials can be characterized by a single function with different materials distinguished only by their coarse-grain strength. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2019.03.019