SYMPOSIA PAPER Published: 01 January 1988
STP24509S

A Micromechanics Model of the Initiation of Grain-Boundary Crack in High-Temperature Fatigue

Source

A continuum mechanics model which incorporated the recovery effect by diffusion of atoms is presented to explain the initiation of grain-boundary wedge-type crack in high-temperature fatigue. The direction of deformation is periodically changed in fatigue, and the crack initiation depends on the deformation history of the grain boundary. A theoretical calculation based on the present model was made on the grain-boundary crack initiation in high-temperature fatigue where the deformation is path-dependent. The calculation results satisfactorily explained the experimental observations in polycrystalline metallic materials.

Author Information

Tanaka, M
Mining College of Akita University, Akita, Japan
Iizuka, H
Mining College of Akita University, Akita, Japan
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Details
Developed by Committee: E08
Pages: 611–621
DOI: 10.1520/STP24509S
ISBN-EB: 978-0-8031-5035-5
ISBN-13: 978-0-8031-0944-5