Research Progress on Ru Element in Nickel-based Single Crystal Superalloys

Author of the article:YE Xinyue 1 , ZHAO Yunsong 2 , ZHANG Mai 2 , LU Guangxian 2 , LI Yuan 2 , ZHANG Jian 2 , LUO Yushi 2 , WANG Enhui 1 , HOU Xinmei 1

Author's Workplace：1. Carbon Neutrality Innovation Research Institute, University of Science and Technology Beijing, Beijing 100083, China; 2. Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China

Key Words： single crystal superalloy; Ru; microstructure; performance

Abstract：Advanced nickel-based single crystal superalloys with excellent creep resistance, fatigue resistance, oxidation
resistance and heat resistance are the preferred materials for the hot end components of modern advanced aero-engines. Ru
has a significant effect on the microstructural stability and high-temperature creep properties of nickel-based single crystal
superalloys. However, relevant studies started late and were not sufficient, so the specific mechanism of Ru is still unclear.
In addition, Ru addition increases the manufacturing cost of nickel-based single crystal superalloys, so high-generation
single crystal alloys are still in the experimental stage at present, and have not been applied in practical production on a
large scale. Based on the effects of Ru on the as-cast microstructure, heat treatment microstructure, structural stability and
creep properties of nickel-based single crystal superalloys, this paper summarizes the research progress of the effect of Ru
element in single crystal superalloys.