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The behavior of a crack near a low-angle grain boundary

โœ Scribed by Gregory R. Miller

Publisher
Springer Netherlands
Year
1986
Tongue
English
Weight
462 KB
Volume
31
Category
Article
ISSN
1573-2673

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โœฆ Synopsis

This paper presents the results of a simplified analysis of the behavior of a microcrack in the vicinity of a low-angle grain boundary. Combining the well-known dislocation model of low angle grain boundaries developed by Burgers, Read and Shockley, and Cottrell (see e.g. [1]) with the crack/dislocation interaction solution developed by Atkinson [2] and Lo [3], a series expression is obtained for the stress intensity factors at the tip of a crack near such a boundary. The main purpose of the analysis is to introduce a grain boundary model which includes aspects of the physical microstructure at the boundary. Results are computed and discussed for a variety of geometrical configurations, with the intent of developing understanding of the role of such boundaries in fracture processes at the micro-level.

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