I am doing research on Inconel 718 and I need to learn the answer to this question to make certain information. Is there a possibility that retained austenite in the microstructure of Inconel 718 as it's in the steel?
Iron contained in Inconel 718 must be in the form of austenite, because other phase variants (ferrite, martensite, etc.) cannot exist in this alloy even at very low temperatures. In addition to the austenite, part of the iron forms the intermetallic compound FeNi3 at temperatures < 500°C, which is completely decomposed to austenite and nickel above 612°C.
Vadim Verlotski Cryogenic treatment can transform retained austenite to martensite. If Inconel 718 contains retained austenite and is cryogenically treated, does this mean that martensite can form in the microstructure?
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