Fracture toughness processes. Final report, February 15, 1981-February 14, 1984
Technical Report
·
OSTI ID:5337460
Crack tip deformation reduces the local crack stresses and shields the crack tip from the applied stress intensity factor. Crack tip shielding due to mixed edge and screw dislocations and dislocation dipole pairs, parallel to the crack front, have been investigated. Crack tip deformation in LiF single crystals has been observed. Blunting and jogging dislocations and dislocation pile-up structures were seen. These dislocations behave differently. The crack tip shielding concept has also been applied to volume and shear transformations in phase transformation toughening materials. Partially stabilized zirconia has been thermally cycled while under stress for analysis in stress-induced phase transformation toughening.
- Research Organization:
- Rochester Univ., NY (USA). Dept. of Mechanical Engineering
- DOE Contract Number:
- AC02-81ER10856
- OSTI ID:
- 5337460
- Report Number(s):
- DOE/ER/10856-05; ON: DE84007244
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360000* -- Materials
ALKALI METAL COMPOUNDS
ALLOYS
CHALCOGENIDES
CRACK PROPAGATION
CRACKS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DISLOCATIONS
FLUORIDES
FLUORINE COMPOUNDS
FRACTURE PROPERTIES
HALIDES
HALOGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
LINE DEFECTS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
MECHANICAL PROPERTIES
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RESIDUAL STRESSES
STEELS
STRESSES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
360000* -- Materials
ALKALI METAL COMPOUNDS
ALLOYS
CHALCOGENIDES
CRACK PROPAGATION
CRACKS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DISLOCATIONS
FLUORIDES
FLUORINE COMPOUNDS
FRACTURE PROPERTIES
HALIDES
HALOGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
LINE DEFECTS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
MECHANICAL PROPERTIES
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RESIDUAL STRESSES
STEELS
STRESSES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES