Heat treatment and analysis of nickel super alloy for gas turbine applications

Abstract

Abstract In this study heat treatment of Monel 400 material (Ni 60%, Cu 33%, and Fe 6.5%) was carried out to study the effect of heat treatment over the fatigue and wear properties for verifying its feasibility in application of high temperature applications. The heat treatment process was carried out using muffle furnace to a temperature of 850 °C, which is maintained at the same temperature for 2hrs followed by the quenching process in a salt bath solution. The heat treated specimens were subjected to various tests like tensile, hardness, impact tests to calculate its mechanical properties. The 3D model of rotor blade was created using CATIA software and was analyzed by Ansys workbench 16.0 for calculating mechanical stresses. In FEM analysis the mechanical properties of the material were assumed as per test results and the static structural analysis has been done on NACA (N series) blade pro-file. The blade deformation and stress were compared with two materials, one is nickel 825 CMSX4 and another one was heat treated Monel 400. The experimental study results shows a significant amount of improvement in properties of Monel 400 and the same results were validated with FEM analysis.