ملخص البحث :

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.

ملخص البحث :

The aim of this study is known the difference that will occur when heat treating of the height strength aluminum alloys AA7075-T73 in a microwave furnace within different mediums (salt solution and oil) at different times (30 and 60) minute, where the heat occurs due to microwave furnace energy effect on the surface of the alloy, changing occur of its properties such as resistance to fatigue and the different mechanical properties. The experimental results of microwave furnace heat energy were showed that there were varied in the mechanical properties. The ultimate stress, yielding stress and fatigue strength were decreased for all states compared with standard values. With reference to fatigue life, the results were showed that the major increment in fatigue life occurred for test states of oil (30 and 60) min in microwave furnace were (83% and 75%) respectively., the increment in hardness range was reached for test state of salt solution medium in 60 min only about 3% from state without treatment samples.