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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Energy Materials 2017: Materials for Gas Turbines
Presentation Title Wang: High Temperature Oxidation of the New Type γ'-strengthened Cobalt-base Superalloys
Author(s) Lei Wang, Yang Liu, Bo Gao, Xiu Song, Shuyu Yang
On-Site Speaker (Planned) Lei Wang
Abstract Scope The cyclic oxidation testing was carried out on γ′-strengthened Cobalt-base superalloys with different Ni content in air at a temperature range from 800℃ to 1000℃. The results show that the Co-base superalloys show excellent oxidation resistance at such high temperatures. At 900℃, the oxidation resistance of Cobalt-base superalloys is significantly better than that of Nickel-base superalloy K417G or and Cobalt-base superalloy DZ40M. And, no obvious effect of the Ni addition on the oxidation properties of the Co-base superalloys can be found. At 800℃, the spinel structure oxides riched in Co, Ni and Cr on the surface and the continuous Al2O3 in the inner oxide layer can protect the alloys avoiding the severe oxidation. At 900℃, pyknotic (Co, Ni)O layer with NaCl structure forms on the surface, and the oxide layers are rich in Cr, therefore the oxidation resistance of alloys keeps high.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advanced Characterization of the Hot Corrosion Behavior of Gas Turbine Alloys under Burner Rig Test Exposures
Alloy Development for Promoting γ/γ' Microstructural Stability and Creep Properties of Multi-component Co-base Superalloys
C-11: Effect of Thermal Debinding and Sintering Conditions on Mechanical Properties of Silica-based Ceramic Cores
C-12: Microstructures and Deposition Mechanisms of Thermal Barrier Coatings Produced by PS-PVD
C-13: Mullitization of Fused Silica on Silica-based Ceramic Cores by Colloidal Alumina Infiltration
C-14: Solidification Behavior and Microstructure of Inconel 625 Superalloy under Electromagnetic Field
C-15: Study on the Undercoolability and Single Crystal Castability of Nickel-Based Superalloys
C-16: Temperature Dependence of the Fracture Behavior of X-750 Alloy and Effect of Heat Treatment
Deposit-Induced Hot Corrosion and Materials Design Strategies to Reduce Its Impact
Development Activities for the Manufacture of Rotor Forgings for Turbines in High Efficiency Power Plants
Development of a New High Strength and Hot Corrosion Resistant Directionally Solidified Superalloy DZ409
Development of High Strength Hot Corrosion Resistant Single Crystal Superalloys Based on Understanding the Effect of Key Elements on Hot Corrosion Behavior
Effect of Alloying Elements (Cr and Al) in Nickel-based Alloys in Molten Sulfate Environments
Effect of C Addition on Creep and Microstructure Stability of Lamellar TiAl Alloys
Efforts to Introduce TiAl Alloys for Gas Turbine Applications
Electrodeposited MCrAlY Coatings for Gas Turbine Engine Applications
Evolution of the Thermal Conductivity of Sm2Zr2O7 under CMAS Attack
Grain Refinement of Cast FeAl-Alloys for Gas Turbine Blades
Mechanisms of Fracture in Laser Powder Bed Additive Manufactured Superalloys
Microstructures and Mechanical Properties of Ultrafine Grained Ni Based Superalloy Matrix Nanocomposites Fabricated by Powder Metallurgy Route
Modeling the Diffusion of Minor Elements in Different MCrAlY – Superalloy Substrates at High Temperature
Multilayered, Multifunctional Thermal Barrier Coatings for Gas Turbine Engines
On Healing Mechanism of Cast Porosities in Cast Ni-Based Superalloy by Hot Isostatic Pressing
Porous Yttria-stabilized Zirconia Microspheres for Advanced Reflective Thermal Barrier Coatings
Rafting Prediction Criterion and Creep Life for Nickel-based Single Crystal Superalloys under Multiaxial Stress States
Rejuvenation of a Co Based Superalloy to Prevent the Quickest Microstructural Degradation during the Following Operating Cycle
Rejuvenation Process Definition for IN792SX Gas Turbine Blades Aimed to Extend Their Expected Life
Revisiting the Sources of Creep Dislocations in Ni-base, Single Crystal Superalloys
Simulation of Precipitation Behavior of Nickel-based Superalloys
Tensile Behavior of Inconel X-750: Effect of Heat Treatment
The Effect of Superalloy and Coating Composition and Specimen Geometry on TBC Lifetime
The Influence of Dendritic Segregation Degree to the Recrystallization Nucleation in U4720LI
The Materials, Manufacturing and Equipments of the Large Disk Forgings for Industrial Gas Turbines
Thermal Barrier Coatings for More Efficient Gas-Turbine Engines
Wang: High Temperature Oxidation of the New Type γ'-strengthened Cobalt-base Superalloys

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