Metallurgical Evaluation of an Additively Manufactured Nickel-Base Superalloy for Gas Turbine Guide Vanes

2021 ◽  
Author(s):  
Alex Bridges ◽  
John Shingledecker ◽  
Alex Torkaman ◽  
Lonnie Houck
Keyword(s):  
Gas Turbine ◽  
Nickel Base Superalloy ◽  
Guide Vanes ◽  
Nickel Base ◽  
Metallurgical Evaluation ◽  
Base Superalloy

Thermo-Mechanical Fatigue of the Nickel Base Superalloy IN738LC for Gas Turbine Blades

2006 ◽  
Vol 321-323 ◽  
pp. 509-512 ◽  
Author(s):  
Jung Seob Hyun ◽  
Gee Wook Song ◽  
Young Shin Lee
Keyword(s):  
Gas Turbine ◽  
Turbine Blades ◽  
Material Behavior ◽  
Experimental Program ◽  
Nickel Base Superalloy ◽  
Strain History ◽  
Stress Strain ◽  
Mechanical Fatigue ◽  
Nickel Base ◽  
Base Superalloy

A more accurate life prediction for gas turbine blade takes into account the material behavior under the complex thermo-mechanical fatigue (TMF) cycles normally encountered in turbine operation. An experimental program has been carried out to address the thermo-mechanical fatigue life of the IN738LC nickel-base superalloy. High temperature out-of-phase and in-phase TMF experiments in strain control were performed on superalloy materials. Temperature interval of 450-850 was applied to thermo-mechanical fatigue tests. The stress-strain response and the life cycle of the material were measured during the test. The mechanisms of TMF damage is discussed based on the microstructural evolution during TMF. The plastic strain energy based life pediction models were applied to the stress-strain history effect on the thermo-mechanical fatigue lives.

The effect of EB PVD coatings on structure and properties of nickel-base superalloy for gas turbine blades

1996 ◽  
Vol 78 (1-3) ◽  
pp. 113-123 ◽  
Author(s):  
A.A. Tchizhik ◽  
A.I. Rybnikov ◽  
I.S. Malashenko ◽  
S.A. Leontiev ◽  
A.S. Osyka
Keyword(s):  
Gas Turbine ◽  
Turbine Blades ◽  
Nickel Base Superalloy ◽  
Structure And Properties ◽  
Pvd Coatings ◽  
Gas Turbine Blades ◽  
Nickel Base ◽  
Base Superalloy

scholarly journals The eddy-current and ultrasonic investigations of the nickel-base superalloy the gas turbine engine blades after exploitation

2021 ◽  
Vol 2131 (5) ◽  
pp. 052025
Author(s):  
A V Gonchar ◽  
V V Mishakin ◽  
V A Klushnikov ◽  
K V Kurashkin
Keyword(s):  
Gas Turbine ◽  
Eddy Current ◽  
Ultrasonic Waves ◽  
Turbine Engines ◽  
Actual State ◽  
Nickel Base Superalloy ◽  
Gas Turbine Engines ◽  
Eddy Current Method ◽  
Nickel Base ◽  
Base Superalloy

Abstract The work carried out microstructural, eddy-current and ultrasonic studies of the material of spent blades of gas turbine engines made of nickel-base superalloy. To determine the degree of damage to the material of the spent blades, studies of the microstructure were carried out on a scanning electron microscope. It was found that γ' coagulation occurred in some specimens, which corresponds to overheated material. Acoustic studies of the material were carried out using the ultrasonic pulse echo method. Comparative analysis showed that in such specimens there is a significant decrease in the velocity of propagation and attenuation of longitudinal ultrasonic waves. It is found that the readings of the eddy-current flaw detector in overheated specimens differ more than twice in comparison with non-overheated specimens. This fact can be used for operational non-destructive testing of the actual state of the metal structure by the eddy current method with the aim of further safe operation of gas turbine engines.

A New Gas Turbine Combustor Alloy

1984 ◽  
Author(s):  
D. L. Klarstrom ◽  
H. M. Tawancy ◽  
D. E. Fluck ◽  
M. F. Rothman
Keyword(s):  
Solid Solution ◽  
Gas Turbine ◽  
Turbine Engines ◽  
Nickel Base Superalloy ◽  
Gas Turbine Engines ◽  
Gas Turbine Combustor ◽  
High Temperature Alloys ◽  
Oxidation Properties ◽  
Nickel Base ◽  
Base Superalloy

A wrought, nickel-base superalloy based on the Ni-Cr-W system has been developed for applications in the hot section of gas turbine engines. The new alloy is solid solution strengthened and very thermally stable. It particularly resists the formation of detrimental intermetallic compounds and contains little or no cobalt. Various mechanical and oxidation properties of the new alloy were measured, and the microstructural features were characterized. These were compared with those for other solid solution strengthened, high-temperature alloys. A number of advantages of the new alloy are defined.

MAR-M Alloy 421

Alloy Digest ◽  
1968 ◽  
Vol 17 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Gas Turbine ◽  
High Strength ◽  
Heat Treating ◽  
Good Combination ◽  
Nickel Base Superalloy ◽  
Nickel Base ◽  
Base Superalloy

Abstract MAR-M Alloy 421 is a precipitation hardened nickel-base superalloy developed to provide a good combination of high strength, ductility, sulfidation resistance, and stability. It is recommended for gas turbine applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-141. Producer or source: Martin Metals Division.

Hot Corrosion and Protection of a Cast Nickel-Base Superalloy for Gas Turbine

1984 ◽  
Author(s):  
Xiao Xuchang ◽  
Yang Zhonglin ◽  
Wu Fengjun ◽  
Xiong Jiyuan
Keyword(s):  
Gas Turbine ◽  
Hot Corrosion ◽  
Nickel Base Superalloy ◽  
Nickel Base ◽  
Base Superalloy

scholarly journals ПОЛУЧЕНИЕ ВЫЖИГАЕМЫХ МОДЕЛЕЙ МЕТОДОМ 3D-ПРИНТИНГА ДЛЯ ОТЛИВОК ГАЗОТУРБИННЫХ ДВИГАТЕЛЕЙ

2019 ◽  
pp. 128-133
Author(s):  
Наталия Алексеевна Лысенко ◽  
Алексей Александрович Педаш ◽  
Владимир Валерьевич Клочихин ◽  
Валерий Владиленович Наумик
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Gas Turbine ◽  
Rupture Strength ◽  
Stress Rupture ◽  
Laser Sintering ◽  
Nickel Base Superalloy ◽  
Cast State ◽  
Nickel Base ◽  
Base Superalloy

A study of the fuse deposited pattern and castings of gas turbine hot section, which was obtained with additive manufacturing, has been carried out in the present article. A pattern of the castings had been produced by selective laser sintering (SLS) process from the polystyrene powders according to developed in special program complex 3D-model. With involving of the obtained FDM-pattern via burned pattern casting process have been produced a parts of gas turbine hot section from nickel-base superalloy VKh4L-VI. The castings were investigated as in the as-cast state, thus and after inherent superalloy VKh4L-VI heat treatment with prior hot isostatic pressing (HIP). An analysis of the obtained FDM-pattern for the presence of surface defects and geometry compliance are provided, together with the macro- and microstructure study of obtained castings and evaluation of mechanical properties and stress rupture strength results. It was established that investigated patterns as precisely as possible reproduce dimensions accuracy of the parts, and castings had satisfactory surface cleanliness, roughness, dense and middle crystalline macrostructure. Micro-structure of castings material is typical for nickel-base superalloy VKh4L-VI in the as-cast state with carbides, carbonitrides and eutectic phase’s presence.HIP with subsequent heat treatment provides almost full micro porosity releases in the inner volumes of the metal and getting more uniform solid-state, almost full eutectic dissolving, and carbides dispersivity. Mechanical properties and stress rupture strength (rupture life) of the specimens produced by considered production processes meet the specification requirements. Application of HIP with subsequent heat treatment (homogenization and ageing) for specimen’s production provides slightly bigger indexes of mechanical properties at room temperature.Selective laser sintering application for FDM-patterns production made it possible to obtain qualitative castings with satisfactory microstructure, the acceptable level of the properties and realize traditional advantages inherent for both considered processes.

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