Advances in the development of creep and fatigue resistance materials - an overview

Abstract

Materials used for high temperature components are required to operate for many years under service conditions of temperature and stress that promote creep, low cycle fatigue and creep- fatigue interaction damages. At elevated temperatures, there are several microstructural variables and testing conditions that influence the properties mentioned. A detailed review has been made of the factors influencing the creep and low cycle fatigue behaviour of high temperature materials employed in power plants and gas turbines. The creep behaviour of weld joints has also been dealt with. A summary of the recent developments in materials and processes being employed to improve the creep and fatigue strength of power plant and gas turbine components has been included.