Rejuvenation of IN738LC gas-turbine blades using hot isostatic pressing and a series of heat treatments

Yang, Sung-Ho; Yun, Junghan; Seok, Chang-Sung

doi:10.1007/s12206-020-1018-2

Cited by 8 publications

(6 citation statements)

References 26 publications

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“…(calibration factor 5 was determined empirically) for evaluating the mechanical properties, which takes into account the complex effect of the main components of the alloy. Since the dimensional mismatch of the lattice parameters is associated with the degree of concentration solid solution hardening of the γ-and γ′-phases, the efficiency of precipitation hardening of the alloy, the creep rate, and other properties, the Kγ′ ratio allows us to associate these properties with multicomponent systems [1][2][3][4][5][6][7][8][9][10].…”

Section: Research Results and Discussionmentioning

confidence: 99%

“…The development of new and optimization of existing alloys for cast parts, namely, the most heavily loaded, such as the working and nozzle blades of a gas turbine engine, is a material science, design and technological task that requires a comprehensive solution [1][2][3][4]. For modern thermally stressed gas turbine engines, the above-mentioned complex-profile parts are made from multicomponent heat-resistant alloys based on nickel, cobalt and iron by the methods of equiaxed, directional or monocrystalline casting [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Properties of nickel-based superalloys of equiaxial crystallization

Глотка¹,

Ольшанецкий²

2021

НМТ

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Purpose. The aim of the work is to obtain predictive regression models, with the help of which, it is possible to adequately calculate the mechanical properties of nickel-based superalloys of equiaxial crystallization, without carrying out preliminary experiments. Research methods. To find regularities and calculate the latest CALPHAD method was chosen, and modeling of thermodynamic processes of phase crystallization was performed. Results. As a result of experimental data processing, the ratio of alloying elements Kg¢ was proposed for the first time, which can be used to assess the mechanical properties, taking into account the complex effect of the main alloy components. The regularities of the influence of the composition on the properties of heat-resistant nickel alloys of equiaxial crystallization are established. The analysis of the received dependences in comparison with practical results is carried out. The relations well correlated with heat resistance, mismatch and strength of alloys are obtained. Scientific novelty. It is shown that for multicomponent nickel systems it is possible with a high probability to predict a mismatch, which significantly affects the strength characteristics of alloys of this class. The regularities of the influence of the chemical composition on the structure and properties of alloys are established. A promising and effective direction in solving the problem of predicting the main characteristics of heat-resistant materials based on nickel is shown Practical value. On the basis of an integrated approach for multicomponent heat-resistant nickel-based alloys, new regression models have been obtained that make it possible to adequately predict the properties of the chemical composition of the alloy, which made it possible to solve the problem of computational prediction of properties from the chemical composition of the alloy. This allows not only to design new nickel-based alloys, but also to optimize the composition of existing brands.

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Section: Research Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Properties of nickel-based superalloys of equiaxial crystallization

Глотка¹,

Ольшанецкий²

2021

НМТ

View full text Add to dashboard Cite

show abstract

“…Materials revitalisation, maintenance, and circular economy are interrelated concepts that collectively contribute to sustainable resource management and the transition to a more sustainable economic model. While material revitalisation focuses on restoring materials to extend their usability and reduces the demand of raw materials [8], maintenance ensures routine actions to prevent deterioration and ensure optimal performance. Together, these concepts play a critical role in advancing the circular economy by conserving resources, reducing waste, creating economic opportunities, and minimising environmental impact [9].…”

Section: Introductionmentioning

confidence: 99%

Revitalising Metallic Materials: A Path towards a Sustainable Circular Economy

Ashraf,

Lodh,

Pagone

et al. 2023

Sustainability

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Improving materials’ productivity and reusability can advance circularity by reducing extraction and enabling efficient fully recyclable parts and systems. However, the pursuit of circular materials often focuses on the choice among reusing, repairing, or recycling materials, with limited consideration for techniques that can proactively revitalise materials. Consequently, the adoption of preventive material therapies remain relatively scarce and unexplored. This work discusses the potential for revitalising metallic materials with preventive maintenance prior to detectable damage and we identify techniques that can effectively prolong the structural lifespan of metallic components. By analysing the literature and considering the eco-footprint and implementation feasibility within the aerospace sector, this study ranks approaches based on their circularity impact and provides valuable insights to guide future research in the field of materials maintenance.

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“…the development of new and optimization of existing alloys for cast parts, namely, the most heavily loaded, such as the working and nozzle blades of a gas turbine engine, is a material science, design and technological task that requires a comprehensive solution [1][2][3][4][5][6]. For modern thermally stressed gas turbine engines, the above-mentioned complex-profile parts are made from multicomponent heat-resistant alloys based on nickel, cobalt and iron by the methods of equiaxed, directional or monocrystalline casting [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Глотка

Ольшанецкий

2021

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Forecasting the ProPerties oF heat-resistant nickel alloys equalaxial crystallizationAs a result of experimental data processing, the ratio of alloying elements Кγ' was proposed for the first time, which can be used to assess the mechanical properties, taking into account the complex effect of the main alloy components. the regularities of the influence of the composition on the properties of heat-resistant nickel alloys of equiaxial crystallization are established. it is shown that for multicomponent nickel systems it is possible with a high probability to predict a mismatch, which significantly affects the strength characteristics of alloys of this class. A promising and effective direction in solving the problem of predicting the main characteristics of heat-resistant materials based on nickel is shown.

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Rejuvenation of IN738LC gas-turbine blades using hot isostatic pressing and a series of heat treatments

Cited by 8 publications

References 26 publications

Properties of nickel-based superalloys of equiaxial crystallization

Properties of nickel-based superalloys of equiaxial crystallization

Revitalising Metallic Materials: A Path towards a Sustainable Circular Economy

Archives of Metallurgy and Materials

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