Stresses at grain boundaries

The maximum incompatibility stress in an infinitely extended elastic bicrystal under uniaxial loading

Journal article (2023)

Authors

K. Liu Team Marcel Sluiter - Mechanical, Maritime and Materials Engineering
M.H.F. Sluiter Universiteit Gent, Team Marcel Sluiter - Mechanical, Maritime and Materials Engineering
Research Group
Team Marcel Sluiter (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2023 K. Liu, M.H.F. Sluiter
DOI
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https://doi.org/10.1016/j.scriptamat.2023.115570
Anisotropy Texture Orientation Grain boundary Incompatibility stress
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Published Date

2023

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Marcel Sluiter

Abstract

In a material under stress, grain boundaries may give rise to stress discontinuities. Stress localization is crucial to materials' behavior such as segregation, precipitation, and void nucleation. Here, the stress state at a grain boundary perpendicular to a uniaxial external stress is studied systematically. The grain boundary with the most extreme stress discontinuity is determined for cubic materials within the elastic limit for a bicrystal model. Additionally, grain boundaries with negligible stress discontinuity are identified. The influence of the elastic tensor components, C11, C12, and C44, and grain orientation is studied quantitatively.