Cavity growth on a sliding grain boundary

Journal Article · Mon Oct 31 23:00:00 EST 1983 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02663303· OSTI ID:6881369

Chen, I-Wei

Cavity growth on a sliding grain boundary to which a normal stress is applied is found to be faster than that on a stationary grain boundary. The morphology of the cavity contains an asymmetric crack-like tip which prompts surface diffusion locally when the sliding is dominant, and the growth rate becomes proportional to the third power of the normal stress independent of the sliding rate. Since the sliding rates of all grain boundaries are statistically comparable, only the normal stress dependence remains important. The conditions which favor the present mechanism are examined and shown to be in good agreement with the experimental evidence in creep cavitation.

• Research Organization: Department of Nuclear Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA
• OSTI ID: 6881369
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 14A:11; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ASYMMETRY
CAVITATION
CAVITIES
CRACK PROPAGATION
CREEP
CRYSTAL STRUCTURE
DIFFUSION
ELEMENTS
GRAIN BOUNDARIES
MATHEMATICS
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
MORPHOLOGY
STATISTICS
STRESSES