High Temperature Materials

Factors influencing functional life of components at elevated temperatures, definition of creep curve, various stages of creep, metallurgical factors influencing various stages, effect of stress, temperature and strain rate


Design of transient creep, time hardening, strain hardening, expressions for rupture life for creep, ductile and brittle materials, Monkman - Grant relationship


Various types of fracture, brittle to ductile from low temperature to high temperature, cleavage, ductile fracture due to microvoid coalescence - diffusion controlled void growth; fracture maps for different alloys and oxides


Oxidation, Pilling-Bedworth ratio, kinetic laws of oxidation - defect structure and control of oxidation by alloy additions - sulphation, hot gas corrosion deposit, modified hot gas corrosion, effect of alloying elements on hot corrosion


Iron base, nickel base and cobalt base superalloys, composition control, solid solution strengthening, precipitation hardening by gamma prime, grain boundary strengthening, TCP phase - embrittlement, solidification of single crystals



1.        Raj R, ‘Flow and Fracture at Elevated Temperatures’, American Society for Metals, 1985


2.        Hertzberg R. W, ‘Deformation and Fracture Mechanics of Engineering Materials’, 4th Edition, John Wiley, 1996


3.        Courtney T.H, ‘Mechanical Behaviour of Materials’, McGraw Hill, 1990