Study the effects of microwave furnace heat on the mechanical properties and estimated fatigue life of AA 7075-T73 with oil and salt solution treatments

Abstract EN

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.