Turbine blades production technique equipment built with a glance of high-gradient directional crystallization process nature

Echin, A. B.; Bondarenko, Yury

doi:10.1051/matecconf/20141413001

Cited by 5 publications

(3 citation statements)

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“…This is consistent with the previous results. [ 12,34,35 ] With the increase in withdraw rate and temperature gradient, the dendritic structure is refined; the formation space for S‐pore decreases, and thus, the S‐porosity decreases.…”

Section: Resultsmentioning

confidence: 99%

Variation of Homogenization Pores during Homogenization for Nickel‐Based Single‐Crystal Superalloys

et al. 2021

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The porosity deteriorates the mechanical properties of nickel‐based superalloys, especially the fatigue properties. Herein, the kinetics model of homogenization porosity growth is optimized. The corresponding diffusion processes during solution heat treatment are simulated by the DICTRA software and verified by experiments. The results show that the homogenization porosity increases first and then decreases during the solution heat treatment, due to the imbalanced diffusion flux between dendritic core (DC) and interdendritic areas (IAs). The diffusion flux first flows toward DC and then toward IAs after fully homogenization of the fast diffusion elements. Moreover, the influence of directional solidification parameters on the homogenization porosity process is investigated. With the increase in the withdraw rate, the dendritic structure is refined, and the S‐porosity decreases. Meanwhile, the dendritic arm spacing decreases; thus, homogenization accelerated increases. In this case, after the solution heat treatment, the homogenization porosity decreases. The results provide two bases to propose a new method to control the homogenization porosity.

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Section: Resultsmentioning

confidence: 99%

Variation of Homogenization Pores during Homogenization for Nickel‐Based Single‐Crystal Superalloys

et al. 2021

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“…The study of different methods for manufacturing turbine blades has also been considered by researchers. For example, Echin and Bondarenko [24] studied the technical specifications of manufacturing turbine blades using the forging method. Torres et al [25] also studied the method of manufacturing turbine blades using laser melting.…”

Section: Literature Reviewmentioning

confidence: 99%

Increasing Energy and Material Consumption Efficiency by Application of Material and Energy Flow Cost Accounting System (Case Study: Turbine Blade Production)

2021

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It is often difficult to extract data on material and energy wastes and related costs in the value chain of manufacturing products. Many organizations are not fully aware of the actual costs of material and energy wastes. For this purpose, advanced costing methods should be used. For this case study, we used material and energy flow cost accounting (MEFCA) to determine material costs, losses, and waste management in the manufacturing of turbine blades at the Iran Power Plant Company. Using the extracted data, the manufacturing costs of turbine blades were studied. The conventional method of turbine blades production is the machining method, which produces a significant amount of material and energy waste. By studying different methods, we found that there is an alternative method called forging, which reduces losses and costs. Finally, the costs of the two methods were compared. Engineering economics techniques were also used to compare the two methods on a long-term planning horizon.

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“…To meet the requirements for the operational characteristics of products in these industries, complex alloying and growing of parts with a single crystal structure is insufficient, and complex designs have to be created. The production of units and parts of complex geom-etry by methods of directional crystallization, despite the success of growing single crystals [7][8][9], is a complex technological problem, not always economically justified, and sometimes fundamentally impossible. Therefore, the task is to manufacture such products from separate, simpler components by welding.…”

Section: Introductionmentioning

confidence: 99%

Features of the Microstructure of Welded Joints of Single Crystals of Heat-Resistant Nickel Alloys

Yushchenko¹,

Zadery²,

Gakh³

et al. 2021

Metallofiz. Noveishie Tekhnol.

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The peculiarities of the microstructure of welded joints of single crystals of heat-resistant nickel alloys made by electron beam welding are considered. The main structural areas of the welded joint are identified: the base metal, the heat effect zone (HAZ), the fusion area, the epitaxial growth zone, the weld sections corresponding to different deviations of the maximum heat dissipation from the orientation of the predominant crystal growth. The dependences of the structure of separate areas, their sizes from the initial crystallographic orientation of the single crystal, the brand of the studied alloy, temperature-temporal and temperature-spatial parameters of the process, determined mainly by welding modes, are established. HAZ is dominated by changes (γ + γ′)-structures consisting in complete or partial dissolution of the primary γ′-phase, large globular eutectic formations with subsequent (upon cooling) separation of the dispersed nanosized secondary γ′-phase. The weld metal is characterized by more noticeable changes in the dendritic structure-variables in the cross section of the weld, its parameters and morphology, a decrease in chemical inhomogeneity compared to the original metal.

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Turbine blades production technique equipment built with a glance of high-gradient directional crystallization process nature

Cited by 5 publications

References 0 publications

Variation of Homogenization Pores during Homogenization for Nickel‐Based Single‐Crystal Superalloys

Variation of Homogenization Pores during Homogenization for Nickel‐Based Single‐Crystal Superalloys

Increasing Energy and Material Consumption Efficiency by Application of Material and Energy Flow Cost Accounting System (Case Study: Turbine Blade Production)

Features of the Microstructure of Welded Joints of Single Crystals of Heat-Resistant Nickel Alloys

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