EFFECT OF SALT-WATER FOG ON FATIGUE CRACK-GROWTH BEHAVIOR OF 7050-ALUMINUM ALLOY IN DIFFERENT ORIENTATIONS


GURBUZ R. , DORUK M., SCHUTZ W.

JOURNAL OF MATERIALS SCIENCE, cilt.26, ss.1032-1038, 1991 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 26 Konu: 4
  • Basım Tarihi: 1991
  • Doi Numarası: 10.1007/bf00576782
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE
  • Sayfa Sayıları: ss.1032-1038

Özet

The fatigue crack growth behaviour of 7050 T73651 high strength aluminium alloy that was originally developed for the aircraft industry was investigated in this study. The tests were conducted by using C-T specimens machined in six orientations under the action of constant amplitude sinusoidal load cycles. The tests were first carried out in laboratory air and then repeated in salt-water fog of a 5% NaCl solution to observe the effect of the environment on the fatigue crack growth behaviour. The experimental results showed that the fatigue life, maximum stress intensity range and the fatigue crack growth rate of the specimens were seriously affected by the environment. The severity of the effect, on the other hand, was observed to be dependent on the orientation. The strongest orientation was determined to be L-S, while the weakest was S-L.