Development of an Oxidation-Resistant High-Strength Sixth-Generation Single-Crystal Superalloy TMS-238

Abstract

For jet engines to meet the ever-increasing demands of ecological compatibility, the compositions of Ni-base single-crystal superalloys have continuously evolved to cope with the increase in turbine entry temperature (TET) owing to the design that improve the thermodynamic efficiency of gas turbine engines. Over the past decade, the addition of Ru has been one of the main subjects of focus to enhance the temperature capability and contribute to the development of new generations of single-crystal superalloys. This paper reposts one of the latest Ru-bearing 6th generation superalloys developed by the National Institute for Materials Science (NIMS), TMS-238. TMS-238 is a promising candidate alloy for future turbine blade applications because it exhibits excellent and well-balanced mechanical and environmental properties. © 2012 The Minerals, Metals, & Materials Society. All rights reserved.