MATERIALS SELECTION FOR GAS TURBINE SEAL RING APPLICATIONS

Abstract

Many alloys are available to designers for seal ring applications in aircraft and industrial gas turbines. In this paper, the capabilities of a number of alloys are reviewed. Emphasis is placed on thermal expansion, density, environmental resistance, high-temperature strength, microstructural stability after exposure to elevated temperatures, weldability, and brazability. Among the alloys considered, the Ni-Cr-Mo HASTELLOY® alloy S offers a potentially useful combination of properties for seal ring applications.