The Effect of Second Phase Particles on the Corrosion Resistance of A286 Alloys

A286 alloy (AISI 660) is an austenitic precipitation hardness stainless steel that is widely used in the gas turbine industry, due to its high-temperature strength and oxidation resistance [1]. A286 alloy contains higher Ni (24.23 wt.%) and lower Cr (14.5 wt.%) than AISI 316 and AISI 304. The main precipitation strengthening phase of this alloy is gamma phase γ' [Ni₃(Al, Ti)], and second phase particles, which form during solution treatment and aging, include eta phase η (Ni₃Ti) and metal carbides and nitrides (TiC, TiN).