Environmental fatigue crack propagation at various frequencies is considered for Ti-2.5Cu (IMI 230) sheet. The environments were dry argon, normal air, distilled water, and 3.5% aqueous NaCl. The frequencies employed were 5, 29, 30, and 50 Hz. Crack propagation rate data are compared in terms of environment and frequency and also with rates predicted by a mechanical model suggested by Pelloux. Results of these comparisons are discussed together with fractographic observations in order to provide a rational for the effects of environment and frequency on mechanics of crack growth.

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© 1974 National Association of Corrosion Engineers
1974
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