Stresses at grain boundaries

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

Journal Article (2023)
Author(s)

Kai Liu (TU Delft - Team Marcel Sluiter)

Marcel Sluiter (Universiteit Gent, TU Delft - Team Marcel Sluiter)

Research Group
Team Marcel Sluiter
Copyright
© 2023 K. Liu, M.H.F. Sluiter
DOI related publication
https://doi.org/10.1016/j.scriptamat.2023.115570
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 K. Liu, M.H.F. Sluiter
Research Group
Team Marcel Sluiter
Volume number
234
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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.