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Application of SEM, TEM and CBED Techniques for Compound Identification in Stress Corrosion Cracking Failure.

Published online by Cambridge University Press:  02 July 2020

R. Caballero  and
A. Quintero
R. Caballero
Affiliation:
Escuela de Ingenieria Metalurgica y Ciencia de Materiales, Univ.Central, Venezuela
A. Quintero
Affiliation:
Stevens Institute of Technology, Hoboken, NJ, 07030
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Stress corrosion cracking has been a problem in aluminum alloys exposed to an aggressive environment under high static residual tensile stress. This work is concerned with the application of electron microscopy to investigate possible causes that led to failure through stress corrosion cracking in the aluminum alloy 5182. This alloy is commonly used for making carbonated beverage containers. The containers in this study did not experience any problem at the time of the filling. However, after humid storage periods going from a few days to a few weeks, leakage at the can ends was reported in many of them. These leaks developed from a failure referred to as aluminum can end blow out.

Figure la shows an SEM micrograph of a cross section of the score imposed on the top of the can during manufacturing. The unscored metal below the score is broken when the ring or tab is pulled out during opening.

Type
Microscopy and Microanalysis in the “Real World”
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 518 - 519
Copyright
Copyright © Microscopy Society of America

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References

1 Whitman, James, Stress Corrosion Cracking of Aluminum Can Ends, Proceeding of the 32nd annual meeting, Society of Soft Drink Technologist. April 29 1985, pp 94–108.Google Scholar

2 Chawla, S. L., Gupta, R. K.Materials Selection for Corrosion Control, ASM International, Materials Park, OH, 1993.Google Scholar

3 EMS, Image simulation program by Stadelmann, P., Ecole Technique Federale de Lausanne. Switzerland.Google Scholar