Some Electrochemical and Microstructural Aspects of Corrosion Fatigue

J Congleton; IH Craig; RA Olieh; RN Parkins

doi:10.1520/STP44820S

SYMPOSIA PAPER Published: 01 January 1983

STP44820S

Some Electrochemical and Microstructural Aspects of Corrosion Fatigue

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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.

Author Information

Congleton, J

University of Newcastle upon Tyne, Newcastle upon Tyne, England

Craig, IH

University of Newcastle upon Tyne, Newcastle upon Tyne, England

Olieh, RA

University of Newcastle upon Tyne, Newcastle upon Tyne, England

Parkins, RN

University of Newcastle upon Tyne, Newcastle upon Tyne, England

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Details

Developed by Committee: G01

Pages: 367–389

DOI: 10.1520/STP44820S

ISBN-EB: 978-0-8031-4867-3

ISBN-13: 978-0-8031-0245-3

Some Electrochemical and Microstructural Aspects of Corrosion Fatigue

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