Performance Comparison Between Isothermal Hot Corrosion And In Situ Cyclic Hot Corrosion of Nickel-Based Superalloys

Abstract Although a lot of work has been done to understand both major mechanisms hot corrosion, namely type I (high-temperature corrosion) and II (low temperature corrosion), there is very little information available on more representative cyclic performance in these regimes. This addresses this by assessing the isothermal (type II) corrosion tests against combined (short long) tests. Single-crystal alloy PWA 1484 directionally solidified MAR-M247 were assessed all test Pre- post-exposure dimensional metrology was used quantify damage characterised using SEM/EDX. paper highlights that results short cycle conditions are damaging compared long standard conditions. The cast nickel-based found be better performer single-crystal alloy.