Development of Intensiostatic-Galvanic Stress Corrosion Tests for High Strength Aluminum Alloys
FRANKFORD ARSENAL PHILADELPHIA PA
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An investigation was performed to identify improved methods for determining the stress corrosion resistance of strain hardenable 5083 alloy and heat-treatable high strength 7075 and 7050 alloys. An intensiostatic test method was investigated for strain hardenable 5083 alloy and the results showed that the test is capable of discriminating among conditions which have small differences in susceptibility to stress corrosion. The improvement in the sensitivity of the intensiostatic test as compared to the conventional alternate immersion test is shown to be significant. In addition, the test is more rapid than the conventional alternate immersion test. A galvanic test method was investigated for two copper bearing high strength aluminum alloys, 7075 and 7050. The results showed that the galvanic test is capable of discriminating among various tempers of the alloys which possess a wide range of stress corrosion susceptibility. The test is also more rapid than the conventional alternate immersion test.
- Properties of Metals and Alloys
- Test Facilities, Equipment and Methods