Table of Contents
Journal of Metallurgy
Volume 2016 (2016), Article ID 5468292, 19 pages
http://dx.doi.org/10.1155/2016/5468292
Review Article

Physical Metallurgy of Modern Creep-Resistant Steel for Steam Power Plants: Microstructure and Phase Transformations

1Renewable Energy Marine Structures Centre for Doctoral Training (REMS CDT), Cranfield University, Cranfield, Bedfordshire MK43 0AL, UK
2Department of Materials & Metallurgical Engineering, Federal University of Technology Owerri, Ihiagwa, Nigeria

Received 26 June 2016; Accepted 11 October 2016

Academic Editor: Sunghak Lee

Copyright © 2016 V. C. Igwemezie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The fact that the microstructure of steel depends on its composition and the heat treatment given to it has been heavily exploited in the design of steel for power plant applications. To obtain a steel that can function at the higher temperature where power plants operate without failure for extended life, heat treatment is needed to produce fine and highly stable dispersion of carbides, nitrides, and intermetallic compounds in the microstructure of the material. A significant contribution also comes from solid solution strengthening by substitutional solutes. We review here various types of phases, microstructures, functions, and interacting effects of the various alloying elements in the design of steel for modern power plant application.