Laser rapid forming processing of TiC reinforced nickel-based superalloy composites: Influence of additive TiC particle content

2019 ◽  
Vol 31 (3) ◽  
pp. 032004
Author(s):  
Sainan Cao ◽  
Hai Gu ◽  
Jianchun Yang ◽  
Bin Li ◽  
Jie Jiang ◽  
...  
Keyword(s):  
Particle Content ◽  
Nickel Based Superalloy ◽  
Tic Particle ◽  
Laser Rapid Forming

scholarly journals Effects of Nano TiC Particles on Recrystallization and Mechanical Properties of Al-Zn-Mg-Cu Alloy

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 753 ◽  
Author(s):  
Yao ◽  
Zhou ◽  
Lu ◽  
Li ◽  
JianWang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Static Recrystallization ◽  
Strengthening Mechanism ◽  
Particle Cluster ◽  
Particle Content ◽  
Cu Alloy ◽  
Tic Particle ◽  
Particle Strengthening ◽  
Reinforcing Particle

The recrystallization and mechanical properties of 7085 alloy and TiC/7085 composites with different nano TiC content (0.1, 0.3, 0.5, and 1 wt%) were investigated in this work. Results showed that as the TiC content increased from 0.1 to 1 wt%, dynamic recrystallization was promoted in which the composites proceeded by hot deformation; after T6 treatment, static recrystallization was hindered. In addition, the ultimate strength of composites first increased and then decreased with the increase of nano TiC particle content from 0.1 wt% to 1 wt%. When the content of nano TiC particles reached 0.5 wt%, the tensile strength of the nanocomposites was improved to 608 MPa, 12% higher than that of 7085 alloy, via the reinforcing particle strengthening mechanism. Due to the grain coarsening and the TiC particle cluster, the ultimate tensile strength of 1 wt% TiC/7085 composite decreased to 585 MPa.

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

Evaluation of the Diamond Particle Content in Ni-P Nano-Composite Coatings

2016 ◽  
Vol 53 (3) ◽  
pp. 144-160
Author(s):  
D. Dietrich ◽  
A. Eilert ◽  
D. Nickel ◽  
T. Lampke
Keyword(s):  
Composite Coatings ◽  
Diamond Particle ◽  
Particle Content ◽  
Nano Composite

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
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