Crack tip deformation in LiF single crystals

Journal Article · Tue May 01 04:00:00 EDT 1984 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(84)90423-X· OSTI ID:6322863

Chia, K Y; Burns, S J

In this report, mode I crack tip deformation has been studied. Dislocation distributions ahead of a crack tip for two different deformation modes are observed: the first blunts the crack front; jogs the crack front. These deformation modes involve different dislocations and slip characteristics. A dislocation-free zone has sometimes been found in both of these deformation modes. The results show that unloading contributes to deformation in the crack tip region, which is contrary to the usual assumption that removal of the applied load relieves the crack tip stress intensity factor.

• Research Organization: Materials Science Program, Department of Mechanical Engineering, University of Rochester, Rochester, NY
• OSTI ID: 6322863
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 18:5; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
CRACK PROPAGATION
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DEFORMATION
DISLOCATIONS
DISTRIBUTION
FLUORIDES
FLUORINE COMPOUNDS
FRACTURE MECHANICS
HALIDES
HALOGEN COMPOUNDS
LINE DEFECTS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
MECHANICS
MONOCRYSTALS
RELAXATION
SLIP
STRESS INTENSITY FACTORS
STRESS RELAXATION