Investigation of the Corrosion Fatigue Behavior of AA 7020 Alloy in SeawaterIbrahim Yurdgulu1, Recep Sadeler2*, Hasan Yilmaz3 and Baris Koc41,2Department of Mechanical Engineering, Faculty of Engineering, Ataturk University, Erzurum, Turkey3 Giresun Municipality, Giresun, Turkey4 FNSS Defense Systems Inc, Ankara, Turkey