Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure and Properties

Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure, and Properties

The chemical, physical, and mechanical characteristics of nickel-based superalloys are reviewed with emphasis on the use of this class of materials within turbine engines. The role of major and minor alloying additions in multicomponent commercial cast and wrought superalloys is discussed. Microstructural stability and phases observed during processing and in subsequent elevated-temperature ser...

Microstructure-Property Relationship in Advanced Ni-Based Superalloys

Improving the oxidation resistance of nickel - based superalloys for turbine blades

I. Introduction: Challenges in energy savings for turbines engines Nickel-based superalloys can withstand high temperatures and severe oxidizing conditions, while maintaining superb mechanical properties. Because of this, they are widely used for aerospace and power generation applications. Since higher operating temperature leads to greater cycle efficiency, there are economic and environmenta...

Diffusion Welding of Nickel-based Superalloys

Ni based superalloys can be welded by diffusion bonding. Temperature, diffusion coefficient, activation energy and Boltzmann constant influence the quality of diffusion bonding, so obtaining the best condition for welding is considered. Showing the suitable condition for diffusion welding of nickel-based superalloys is the aim of this paper.

Advanced Thermal Barrier Coatings for Industrial Gas Turbine Engines

Executive Summary 3 Thermal barrier coating (TBC) ceramic topcoats made from Y 2 O 3-stabilized ZrO 2 (YSZ) have been used successfully in gas-turbine engine applications for more than 30 years. YSZ derives its favorable performance from a combination of properties that include low thermal conductivity, high thermal expansion coefficient, and phase stability to relatively high temperatures. Wit...