Effect of microalloying on process ductility of high-temperature alloy KhN62MBKTYu (EP742-ID)

Artyushov, V. N.; Kudrin, A. A.; Kirpichnikov, M. S.; Ponomareva, L. L.

doi:10.1007/s11015-011-9472-9

Cited by 8 publications

(3 citation statements)

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“…Silicon (not more than 0.3 per cent), manganese (not more than 0.4 per cent), iron (not more than 1.0 per cent) are associated but undesirable elements, and therefore their content is limited. A special role is played by microalloying elements as cerium and lanthanum, whose introduction into the alloy in small amounts (hundredths or even thousandths of a percentage) leads to a marked increase in service (heat resistance) or production properties (Artyushov, 2011).…”

Section: Fatigue Analysismentioning

confidence: 99%

Fatigue stress analysis of the DV-2 engine turbine disk

Čerňan

Semrád

Draganová

et al. 2019

AEAT

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Purpose The purpose of this study is to improve life prediction of certain components. Fatigue of the high-stressed structural elements is an essential parameter that affects the lifetime of such components. In particular, aviation engines are devices whose failure due to fatigue failure of one of the important components can lead to fatal consequences. Design/methodology/approach In this study, two analyses in the turbine disk of the jet engine during the simulated operating load were performed: The first one was the analysis of the heat-induced stresses using the finite element method. The goal of the second analysis was to determine the residual fatigue strength of a loaded disk by the software tool using the Palmgren - Miner Linear Damage Theory. Findings The results showed a high degree of similarity with the real tests performed on the aircraft engine and revealed the weak points in the design of the jet engine. Research limitations/implications It should be mentioned that without appropriate experiments, results of this analysis could not be verified. Practical implications These results are helpful in the re-designing of the jet engines to increase their technical feasibility. Originality/value Such analysis has been realized in the DV-2 jet engine research and development program for the first time in the history of jet engine manufacturing process in Slovakia and countries of Eastern Europe region.

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Section: Fatigue Analysismentioning

confidence: 99%

Fatigue stress analysis of the DV-2 engine turbine disk

Čerňan

Semrád

Draganová

et al. 2019

AEAT

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“…Microalloying with RZE has a significant effect on the properties and structure of high-temperature nickel alloys [8,9]. From the 14 lanthanides belonging to group IIIb of Mendeleev's periodic table of elements, it is lanthanum and cerium that are mostly used for the microalloying of nickel high-temperature deformable alloys [12][13][14]. Taking into account the fact that lanthanides have similar physical and chemical properties, it is interesting to study the possibility of using microalloying with praseodymium, neodymium and other elements of this group [9,15,16].…”

Section: Introductionmentioning

confidence: 99%

La, Pr, Nd microalloying influence on deformable heat resisting nickel alloy of the VZh175 type structure forming

Chabina¹,

Filonova²,

Lomberg³

et al. 2015

LoM

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By high-allowing metal physical and heat physical techniques complex means lanthanum, prazeodim and neodim separate influence on deformable high-heat resisting Ni-Co-Cr-Al-Ti-W-Mo-Nb alloying system nickel base alloy structure forming features are investigated. Three model material compositions structural and phase conditions were studied after heat treatment. It is shown that lanthanum, prazeodim and neodim individual influence on quantity of phases, grain and interphase boundaries structure change and material heat physical characteristics variously. These alloys class structure represents γ'-solid solution grains with primary γ'-phase particles, evenly distributed on grain boundaries. The alloy contains niobium and titanium based carbides MC, being formed at material crystallization stage during melting. Solid solution in grains is strengthened by secondary γ'-phase particles. Grain boundaries are strengthened by γ'-phase, chrome and molybdenum based carbides and borides particles. At introduction in the material rare earth elements (RZE) complicated structure different sizes and morphology nickel and RZE based intermetallid phases, which are evenly distributed in material volume, are formed. They also allocated on grain and γ/γ' interphase boundaries, in addition strengthening them. Material structure change distinctions are revealed: maximum quantity grain and γ/γ' interphase boundaries secondary carbides, borides and intermetallid phases with RZE after heat treatment are containing at composition with the prazeodim; composition with the neodim differs by the maximum nanodimensional γ'-phase quantity and the minimum secondary intermetallid phase with RZE quantity. Containing lanthanum, prazeodim and neodim compositions differ with temperature and total warmth of endothermic effect of carbide, boride and intermetallic phases dissolution.

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“…Upon reaching a certain ratio between the total content of Al and Ti ( ′ γ -forming elements) and the total content of Mo and Cr (mainly, γ -stabilizing elements), the maximum hardening and structural stability are achieved. In this case, the material contains ′ γ -phase particles of different sizes formed as a result of complex heat treatment process, which involves quenching and aging [1][2][3]. The presence of Ti and Al in these alloys in the quantities exceeding their ultimate solubility in solid solution at temperatures ranging from 650 to 950°C allows achieving dispersion hardening after quenching and aging due to precipitation of the dispersed particles of intermetallic phase, such as Ni 3 (Ti, NiAl).…”

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confidence: 99%

Influence of Surfacing Technologies on Structure Formation of High-Temperature Nickel Alloys

et al. 2019

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UDC 621.791The paper presents the results of studying the formation of structure and properties of metals when using additive technologies, such as arc and laser surfacing of highly alloyed nickel alloys. The main problem of nickel-chromium alloys during treatment with highly concentrated energy sources (welding, surfacing, soldering, plasma and laser treatment) consists in low strength and heat resistance after heating to high temperatures and rapid cooling, which is typical for these methods. The maximum high-temperature strength of such alloys is achieved after quenching and subsequent aging resulting in the formation of finely-dispersed ′ γ -phase precipitates, which inhibit plastic deformation. However, the achieved level of high-temperature strength of nickel alloys is often reduced significantly as a result of thermal effects and unfavorable structural changes during subsequent treatment (welding, surfacing). The paper presents the results of studying the structure, phase composition and properties of EP648 alloy during argon-arc surfacing. A comparison with the EP648 alloy structures obtained by laser surfacing is provided. It was established that argon-arc welding of EP648 alloy in combination with ultrasonic treatment creates an additional effect of increasing phase dispersion, which leads to an increase in hightemperature strength of the alloy.

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Effect of microalloying on process ductility of high-temperature alloy KhN62MBKTYu (EP742-ID)

Cited by 8 publications

References 0 publications

Fatigue stress analysis of the DV-2 engine turbine disk

Fatigue stress analysis of the DV-2 engine turbine disk

La, Pr, Nd microalloying influence on deformable heat resisting nickel alloy of the VZh175 type structure forming

Influence of Surfacing Technologies on Structure Formation of High-Temperature Nickel Alloys

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