Phase composition of the diffusion layers of metallic coatings on heat-resistant nickel alloys

1994 ◽  
Vol 36 (12) ◽  
pp. 638-642
Author(s):  
E. N. Kablov ◽  
G. I. Morozova ◽  
G. N. Matveeva ◽  
S. A. Budinovskii
Keyword(s):  
Phase Composition ◽  
Nickel Alloys ◽  
Metallic Coatings ◽  
Heat Resistant ◽  
Diffusion Layers

Increasing the heat resistance of cast nickel-based complex alloyed alloys due to the influence of the redistribution of alloying elements between the γ-solid solution and the strengthening intermetallic γ'-phase

2020 ◽  
pp. 67-79
Author(s):  
O.M. Gubanov ◽  
V.N. Gadalov ◽  
Yu.V. Skripkina ◽  
I.A. Makarova
Keyword(s):  
Phase Composition ◽  
Heat Resistance ◽  
Nickel Alloys ◽  
Diffusion Processes ◽  
Distribution Coefficients ◽  
Alloying Elements ◽  
Maximum Heat ◽  
Alloying System ◽  
Heat Resistant ◽  
Positive Effect

The analysis of alloying of the chemical and phase composition of domestic and foreign cast heat-resistant alloys with a nickel matrix is carried out; the tendency to increase the level of heat-resistant properties of cast nickel alloys due to more complex alloying is traced. Recently, expensive rhenium, ruthenium, hafnium, and dysprosium have increasingly been used as alloying elements. The positive effect of these elements on the thermal stability of the γ-matrix and the strengthening γ'-phase is established. The above elements inhibit diffusion processes, thereby increasing the creep resistance of alloys at high temperatures and loads. The evaluation of heatresistant nickel alloys obtained by directional crystallization is given. It is established that the most significant parameters of the phase composition of the studied alloys are the distribution coefficients of alloying elements between the γ' and γ-phases (Ki). The basic principles of balanced alloying, which are used to select the optimal chemical composition of heat-resistant nickel alloys, are formulated. To achieve the maximum heat resistance parameters in the selected heat-resistant nickel alloys alloying system, the calculated value γ/γ' defined by “misfit” was used, which is calculated by the formula: Δа = (аγ-аγ')/ аγ, where аγ and аγ' are the lattice periods of γ and γʹ-phases. Thus, the calculated Δа should be positive for аγ> аγ' and at least two to three times more than for single-crystal heat-resistant nickel alloys with a traditional alloying system, for which Δа = (0.1-0.2) or more. It is shown that misfit (γ/γ') is mainly determined by those alloying elements that increase the аγ most significantly. These elements are Re, Pu, Mo, W, Nb, and Ta in ascending order of influence on the lattice period (аγ) of the phase.

Calculation of plasma centrifugal spraying parameters of fine granules of heat-resistant nickel alloys

2020 ◽  
pp. 471-474
Author(s):  
M.G. Yagodin ◽  
E.I. Starovoytenko
Keyword(s):  
Powder Metallurgy ◽  
Nickel Alloys ◽  
Dynamic Pressure ◽  
Calculated Data ◽  
Powder Size ◽  
Metal Powders ◽  
Heat Resistant ◽  
Gas Dynamic ◽  
Spraying Parameters ◽  
Wide Range

The equipment for the production of wide range of metal powders purposed for powder metallurgy is described. The possibility for producing of powders by the plasma centrifugal spraying is considered taking into account the gas dynamic pressure. The calculated data on the powder size for different materials are given.

Structure and Phase Composition of Heat-Resistant Ni–Al–Co Alloy After Annealing and Creep

2019 ◽  
Vol 61 (12) ◽  
pp. 2218-2224
Author(s):  
N. A. Koneva ◽  
A. I. Potekaev ◽  
E. L. Nikonenko ◽  
N. A. Popova ◽  
A. A. Klopotov ◽  
...  
Keyword(s):  
Phase Composition ◽  
Heat Resistant

scholarly journals Phase composition of galvanic iron-nickel alloys obtained using pulsed current

2021 ◽  
Vol 22 (1) ◽  
pp. 141-145
Author(s):  
R.P. Ganich ◽  
V.O. Zabludovsky ◽  
V.V. Artemchuk ◽  
Y.V. Zelenko ◽  
R.V. Markul
Keyword(s):  
Phase Composition ◽  
Nickel Alloys ◽  
Pulse Current ◽  
Equilibrium Diagram ◽  
Component Composition ◽  
Pulse Action ◽  
Unipolar Pulse ◽  
Iron Nickel ◽  
The Moment ◽  
Iron Nickel Alloys

The paper presents the results of studying the phase composition of iron-nickel alloys obtained by unsteady electrolysis. It was found that the use of a unipolar pulse current leads to a significant increase in the crystallization overvoltage at the crystallization front at the moment of the pulse action, which affects the component composition of the coatings. The phase composition of the alloys formed at the cathode differs from that shown in the iron-nickel equilibrium diagram.

Sintering process, structure, and phase composition of metal-graphite materials based on nickel alloys

1971 ◽  
Vol 10 (10) ◽  
pp. 786-789
Author(s):  
V. I. Itin ◽  
Yu. I. Kozlov ◽  
L. I. Pugina ◽  
A. G. Yurchenko ◽  
K. V. Savitskii ◽  
...  
Keyword(s):  
Phase Composition ◽  
Nickel Alloys ◽  
Sintering Process ◽  
Process Structure

Structure and phase composition of complexly alloyed powdered niobium containing nickel alloys

1988 ◽  
Vol 27 (3) ◽  
pp. 255-259
Author(s):  
L. E. Popova ◽  
V. I. Shvarts ◽  
V. F. Kotov ◽  
R. V. Lapina ◽  
G. B. Zvereva ◽  
...  
Keyword(s):  
Phase Composition ◽  
Nickel Alloys

INTERMETALLIC COMPOUND AlxTi – ARE PROMISING MATERIAL FOR HIGH ELEVATED TEMPERATURES (review) Part 2. The mechanical properties of the intermetallic Al2Ti compound and the effect of alloying

2021 ◽  
pp. 32-47
Author(s):  
N.A. Nochovnaya ◽  
◽  
V.I. Ivanov ◽  
L.Yu. Avilochev ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Intermetallic Compound ◽  
Elevated Temperatures ◽  
Niobium Alloy ◽  
Promising Material ◽  
Two Phase ◽  
Heat Resistant ◽  
Refractory Elements ◽  
Additional Doping

Intermetallide alloys based on the Al2Ti compound are the most promising heat-resistant materials for future energy plants.The review examines the mechanical properties of the Al2Ti Intermetalide, two-phase alloys based on it and the doped niobium alloy. For use at temperatures of up to 950 °С, alloys with phase composition r-Al2Ti + γ-TiAl and platemicrostructure with additional doping of refractory elements are of interest.

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