AN EVALUATION OF THREE OXIDATION-RESISTANT ALLOY CLADDINGS FOR IN 100 AND WI 52 SUPERALLOYS

摘要

This study demonstrated the feasibility of protecting typical turbine alloys from cyclic furnace oxidation by cladding them with oxidation-resistant alloy foils. Foils of Ni-30Cr-l.4Si, Ni-20Cr-4Al-l.2Si, and Fe-25Cr-4Al-lY were bonded to IN 100 (Ni base) and WI 52 (Co base). Cyclic oxidation exposure to 200 hours was conducted at 1900° and 2000° F (1310 and 1360 K). At 1900° F (1310 K), gravimetric, metallographic, and inter-diffusion analyses showed all three claddings capable of providing excellent protection for both substrates. At 2000° F (1360 K), Ni-30Cr-1.4Si and Fe-25Cr-4Al-lY provided excellent protection for WI 52, while Ni-20Cr-4Al-l. 2Si afforded good protection for IN 100.