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Stress corrosion cracking of aluminum alloys

  • Markus O. Speidel
Symposium on Advances in the Physical Matallurgy of Aluminum Alloys

Abstract

Stress corrosion cracking of aluminum alloys is reviewed. An extensive failure analysis shows how many service failures occurred in the aerospace industry over a ten year period and what kind of alloys and stresses led to initiation and propagation of stress corrosion cracks which caused these service failures. The paper contains most of the results of stress corrosion tests with aluminum alloys that have been obtained to date with fracture mechanics techniques. Stress corrosion crack growth rate measurements are compared with the results from smooth specimen testing and it is shown that the correlation between the different test results is very satisfactory. The present and limited status of theoretical understanding of stress corrosion cracking is outlined.

A major part of the paper is devoted to the results of the latest alloy development. High strength aluminum alloys of dramatically increased stress corrosion resistance are available now. In the near future, stress corrosion resistant alloys of even higher strength might become available. What is still lacking is a detailed understanding of the mechanisms by which stress corrosion cracks initiate and propagate.

Keywords

Aluminum Alloy Metallurgical Transaction Stress Intensity Crack Growth Rate Stress Corrosion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© American Society for Metals, The Melallurgical Society of AIME 1975

Authors and Affiliations

  • Markus O. Speidel
    • 1
  1. 1.Ohio State UniversityColumbus

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