Some electrochemical and microstructural aspects of corrosion fatigue

Conference · Thu Oct 01 04:00:00 EDT 1981 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:6269969

Congleton, J; Craig, J H; Olieh, R A; Parkins, R N

The initiation of corrosion-fatigue cracks in pure aluminum single crystals, polycrystalline aluminum, and in a BS4360 50D steel has been investigated. Experiments were performed in 3.5% sodium chloride solution, and measurements of the rate of nucleation and early growth of cracks were obtained by quantitative metallography. Initiation occurred at persistent slip bands or grain boundaries in aluminum but at inclusions in the steel. The role of microstructure in corrosion fatigue crack initiation is discussed. It is suggested that the growth rate of short cracks may be controlled by chemical dissolution. Results from straining electrode experiments on high yield strength steels are described that support this conclusion.

• Research Organization: Dept. of Metallurgy and Eng. Materials, Univ. of Newcastle upon Tyne
• OSTI ID: 6269969
• Report Number(s): CONF-8110309-
• Conference Information: Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Journal Volume: STP-801
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
ALLOYS
ALUMINIUM
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
CORROSION FATIGUE
CRACK PROPAGATION
CRYSTAL STRUCTURE
CRYSTALS
DISSOLUTION
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
FATIGUE
GRAIN BOUNDARIES
HALIDES
HALOGEN COMPOUNDS
INCLUSIONS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
METALLOGRAPHY
METALS
MICROSTRUCTURE
MONOCRYSTALS
NUCLEATION
POLYCRYSTALS
QUANTITY RATIO
SLIP
SODIUM CHLORIDES
SODIUM COMPOUNDS
STEELS
STRAINS
YIELD STRENGTH