The Prediction of Corrosion –Fatigue Life of AA7076-T61

Assi, Abdullah Dhayea

doi:10.36582/ksj.2026.167685.1006

The Prediction of Corrosion –Fatigue Life of AA7076-T61

Document Type : Original Article

Author

Abdullah Dhayea Assi

University of Baghdad, College of Engineering

https://doi.org/10.36582/ksj.2026.167685.1006

Abstract

The behavior of crack Propagation, under take condition of corrosion fatigue has been studied in hi Strength aluminum alloy AA7076-T61, using rotating bending technique. This study showed a model covering three phases (i. microstructurally short cracks (MSC), ii. physically small cracks (PSC) and iii. long fatigue creaks (LC)). The first phase of this model proved to be not effective, other phases can be used successfully to predict corrosion-fatigue life under the condition of constant amplitude testing.Corrosion fatigue crack propagation in metals resulting from the conjoint action of cyclic stressing and exposure to chemically aggressive environment, is often characterized by fracture mechanics method . Rates of fatigue crack propagation da/dN in corrosive environment are usually |controlled by interrelated mechanical and chemical driving. The most important practical characteristic of corrosion -fatigue is that the S/N curve produced in a corrosive: environment shows no fatigue limit, even for materials such as mild steel which would usually show marked limit when fatigue air. At high stress (short life) behaviors in air and in corrosive environment are practically identical.

Keywords

Stir Casting Technique (SCT)

AA7076-T61

Metal Matrix Nano Composites

corrosion - fatigue