Print Email Facebook Twitter Stress corrosion crack initiation testing of high strength aluminium alloys using tuning fork type specimens Title Stress corrosion crack initiation testing of high strength aluminium alloys using tuning fork type specimens Author Schra, L. Huisman, H.N. Institution National Aerospace Laboratory NLR Date 1981-04-30 Abstract An experimental investigation was carried out into the applicability of various corrosive environments for stress corrosion crack initiation testing of high strength aluminium alloys using constant strain loaded tuning fork type specimens. The effect of surface preparation was also involved. The most important findings were that salt-chromate solution inhibited general corrosion effectively but either did not result in cracking or, at a low pH value, led to an unrealistic ranking of materials as to SCC. The material behaviour experienced under atmospheric conditions was reflected very well by alternate-immersion testing in a salt solution. However, a pickling pre-treatment caused in different alloys a different degree of attack and resulted in substantially shorter lifetimes for alternate immersion testing. Subject High strength alloysAluminum alloysStress corrosion crackingCrack initiationCorrosion resistanceStrain rateChromatesSodium chloridesSurface finishingSalt spray testsAccelerated life tests To reference this document use: http://resolver.tudelft.nl/uuid:c4270675-e9b3-4f0b-8041-1cd305211bc3 Publisher Nationaal Lucht- en Ruimtevaartlaboratorium Access restriction Campus only Source NLR-TR 81053 U Part of collection Aerospace Engineering Reports Document type report Rights (c)1981 National Aerospace Laboratory NLR Files campus only