High-temperature alloys research: Still going strong

Abstract

In this issue of JOM, the High Temperature Alloys Committee and the Seven Springs International Symposium Committee have compiled seven papers to provide a snapshot of the dynamic world of high-temperature alloys research. The search for structural materials that can be used at higher temperatures, under increased stresses, in more aggressive environments, and for longer times is a never-ending battle. In particular, the development of the gas turbine engine has been paced by the development of high-temperature materials, and more specifi cally, superalloys. The goal to achieve higher effi ciencies, increased performance, and decreased emissions in gas turbines has and will continue to require improved materials. The papers in this issue are broken down into two categories: processing and properties of high-performance coatings and alloys and recent development of high-temperature alloys. Most of the papers are on nickel-based superalloys, the most commonly used materials in the hot sections of gas turbines. Also included are two examples of other high-temperature materials. Within the fi ve high-performance coatings and alloys papers, the development of new alloys and the effects of composition and processing on the properties of high-temperature alloys are discussed. M.P. Brady et al. describe in “The Development of Alumina-Forming Austenitic Stainless Steels for High-Temperature Structural Use” the development of a new family of Al 2 O 3 -forming austenite stainless steels High-Temperature Alloys Research: Still Going Strong