Fatigue‐creep interaction performance of Incoloy 825 nickel‐based superalloy at 650 °C

2021 ◽  
Vol 52 (6) ◽  
pp. 624-634
Author(s):  
X. Huo ◽  
F. Li ◽  
Q. Zhu ◽  
L. Chen ◽  
B. Wang
Keyword(s):  
Nickel Based Superalloy ◽  
Incoloy 825

Surface Modification and its Influence on the Microstructure and Creep Resistance of Nickel Based Superalloy René 77 / Modyfikacja Powierzchniowa Oraz Jej Wpływ Na Mikrostrukture I Wytrzymałosc Na Pełzanie Odlewów Z Nadstopu Niklu Ren´E 77

2013 ◽  
Vol 58 (1) ◽  
pp. 95-98 ◽  
Author(s):  
M. Zielinska ◽  
J. Sieniawski
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Surface Modification ◽  
Turbine Blades ◽  
Processing Parameters ◽  
Grain Structure ◽  
Creep Tests ◽  
Cobalt Aluminate ◽  
Nickel Based Superalloy ◽  
Average Grain Size

Superalloy René 77 is very wide used for turbine blades, turbine disks of aircraft engines which work up to 1050°C. These elements are generally produced by the investment casting method. Turbine blades produced by conventional precision casting methods have coarse and inhomogeneous grain structure. Such a material often does not fulfil basic requirements, which concern mechanical properties for the stuff used in aeronautical engineering. The incorporation of controlled grain size improved mechanical properties. This control of grain size in the casting operation was accomplished by the control of processing parameters such as casting temperature, mould preheating temperature, and the use of grain nucleates in the face of the mould. For nickel and cobalt based superalloys, it was found that cobalt aluminate (CoAl2O4) has the best nucleating effect. The objective of this work was to determine the influence of the inoculant’s content (cobalt aluminate) in the surface layer of the ceramic mould on the microstructure and mechanical properties at high temperature of nickel based superalloy René 77. For this purpose, the ceramic moulds were made with different concentration of cobalt aluminate in the primary slurry was from 0 to 10% mass. in zirconium flour. Stepped and cylindrical samples were casted for microstructure and mechanical examinations. The average grain size of the matrix ( phase), was determined on the stepped samples. The influence of surface modification on the grain size of up to section thickness was considered. The microstructure investigations with the use of light microscopy and scanning electron microscopy (SEM) enable to examine the influence of the surface modification on the morphology of ’ phase and carbides precipitations. Verification of the influence of CoAl2O4 on the mechanical properties of castings were investigated on the basis of results obtained form creep tests.

Residual Stresses in High Speed Turning of Nickel-Based Superalloy*

2014 ◽  
Vol 69 (1) ◽  
pp. 46-53 ◽  
Author(s):  
R. L. Peng ◽  
J.-M. Zhou ◽  
S. Johansson ◽  
A. Bellinius ◽  
V. Bushlya ◽  
...  
Keyword(s):  
Residual Stresses ◽  
High Speed ◽  
High Speed Turning ◽  
Nickel Based Superalloy

Piezoelectric Response to Pressure of Aluminum Nitride Thin Films Prepared on Nickel-Based Superalloy Diaphragms

2006 ◽  
Vol 45 (6A) ◽  
pp. 5169-5173 ◽  
Author(s):  
Ichiro Ohshima ◽  
Morito Akiyama ◽  
Akira Kakami ◽  
Tatsuo Tabaru ◽  
Toshihiro Kamohara ◽  
...  
Keyword(s):  
Thin Films ◽  
Aluminum Nitride ◽  
Piezoelectric Response ◽  
Nickel Based Superalloy

scholarly journals Aluminide Thermal Barrier Coating for High Temperature Performance of MAR 247 Nickel Based Superalloy

Coatings ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 48
Author(s):  
Mateusz Kopec ◽  
Dominik Kukla ◽  
Xin Yuan ◽  
Wojciech Rejmer ◽  
Zbigniew L. Kowalewski ◽  
...  
Keyword(s):  
High Temperature ◽  
Stress Amplitude ◽  
Aluminide Coating ◽  
Chemical Vapor ◽  
Fatigue Tests ◽  
Protective Atmosphere ◽  
X Ray ◽  
Nickel Based Superalloy ◽  
Barrier Coating ◽  
Aluminide Layer

In this paper, mechanical properties of the as-received and aluminide layer coated MAR 247 nickel based superalloy were examined through creep and fatigue tests. The aluminide layer of 20 µm was obtained through the chemical vapor deposition (CVD) process in the hydrogen protective atmosphere for 8 h at the temperature of 1040 °C and internal pressure of 150 mbar. A microstructure of the layer was characterized using the scanning electron microscopy (SEM) and X-ray Energy Dispersive Spectroscopy (EDS). It was found that aluminide coating improve the high temperature fatigue performance of MAR247 nickel based superalloy at 900 °C significantly. The coated MAR 247 nickel based superalloy was characterized by the stress amplitude response ranging from 350 MPa to 520 MPa, which is twice as large as that for the uncoated alloy.

scholarly journals Oxidation of Thin Nickel-Based Superalloy Specimens: Kinetics Study and Mechanical Integrity

2021 ◽  
Author(s):  
Charles Romain ◽  
Damien Texier ◽  
Clara Desgranges ◽  
Jonathan Cormier ◽  
Stéphane Knittel ◽  
...  
Keyword(s):  
Kinetics Study ◽  
Mechanical Integrity ◽  
Nickel Based Superalloy ◽  
Thin Nickel

High temperature protection of NiCrAlSiY/Al–Cr–O coatings deposited by arc ion plating on nickel-based superalloy

Vacuum ◽  
2021 ◽  
pp. 110152
Author(s):  
Lijun Xian ◽  
Haibo Zhao ◽  
Guang Xian ◽  
Chencheng Wang ◽  
Hong He
Keyword(s):  
High Temperature ◽  
Arc Ion Plating ◽  
Ion Plating ◽  
Nickel Based Superalloy

Coating-associated microstructure evolution and elemental interdiffusion behavior at a Mo-rich nickel-based superalloy

2021 ◽  
Vol 411 ◽  
pp. 127005
Author(s):  
Yuan Liu ◽  
Min Zou ◽  
Hongzhi Su ◽  
Lilun Geng ◽  
Youxing Yu ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Nickel Based Superalloy
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