Microwaves furnace heat effect on aluminum alloy 7075-T73

This paper focusing upon the effects of microwave wavelengths processing when treating AA7075-T73 in microwaves furnace within 1 liter from salt solution, acid and oil at duration time of (30 and 60) min. Where microwave furnace energy lead to many effect on the surface of aluminum alloy, changing the mechanical properties like hardness, ultimate stress, resistance to fatigue life and surface roughness. The results revealed that the microwave furnace heat energy were variations in the mechanical properties with the variation in mediums and duration times without treatment of samples. The ultimate stress, yielding stress and fatigue strength decreased for all states compared with standard values. With reference to fatigue life, the results showed that the major increment in fatigue life occurred for test states of oil in microwave furnace with time of 30 to 60 min respectively, which were (83% and 75%), respectively. Moreover, the increment in hardness range was reached for test state of acid 60 min which was about 7.5 % and only 3% for salt solution medium in 60 min.