Various metallography techniques for microstructure analysis of Ni-based superalloys

• Autorzy: Belan Juraj , Uhríčik Milan , Mikolajčík Martin , Šurdová Zuzana

Identyfikatory

DOI

10.2478/czoto-2024-0048

• Języki publikacji: EN

Abstrakty

EN

The Ni-based superalloys are known for the number of phases presented in alloy microstructure. Depending on alloying elements, phases such as austenitic FCC gamma matrix, L12 gamma prime, DO22 gamma double prime, BCT delta phase, and MC or M23C6 (or M6C) carbides have occurred. With these microstructure components' variety, the usual optical microscopy analysis is not satisfactory many times. For a better understanding of how single structures affect the lifetime of Nibased superalloys components (turbine blades or turbine discs) and how they are changing during their operation load is SEM a very powerful tool. Two different types of superalloys were used for experimental evaluation. The first were cast superalloys ZhS6K and IN 738. Both cast superalloys in bar form were subjected to additional heat treatment at 800°C for 10 and 15 hours followed by air-cooling. The influence of gamma prime phase morphology changes on alloy lifetime and Vickers hardness were evaluated by SEM coherent testing grid methods. The second was wrought superalloy IN 718 and Nimonic 80A in bar form to present the various grain size evaluation techniques according to ASTM E112 standards. Various analyses were employed (SEM fractography, BSE observation, EDS mapping, etc.) for microstructure evaluation. The main goal is to show how effective light microscopy and SEM on Ni-based superalloy analysis are when microstructure change evaluation is needed.

Słowa kluczowe

EN

Ni-based superalloy; optical microscopy; SEM analysis; gamma prime phase; delta phase; grain size evaluation

PL

superstop na bazie niklu; mikroskopia optyczna; analiza SEM; faza gamma; faza delta; ocena wielkości ziarna

• Wydawca: De Gruyter
• Czasopismo: System Safety : Human - Technical Facility - Environment
• Rocznik: 2024
• Tom: Vol. 6, iss. 1
• Strony: 473--484
• Opis fizyczny: Bibliogr. 17 poz. rys., tab.

Twórcy

autor

Belan Juraj

• University of Žilina, Faculty of Mechanical Engineering, Department of Materials Engineering, Univerzitná 8215/1, 01026 Žilina, Slovakia

• https://orcid.org/0000-0002-2428-244X

autor

Uhríčik Milan

• University of Žilina, Faculty of Mechanical Engineering, Department of Materials Engineering, Univerzitná 8215/1, 01026 Žilina, Slovakia

• https://orcid.org/0000-0002-2782-5876

autor

Mikolajčík Martin

• University of Žilina, Faculty of Mechanical Engineering, Department of Materials Engineering, Univerzitná 8215/1, 01026 Žilina, Slovakia

• https://orcid.org/0000-0002-7477-6237

autor

Šurdová Zuzana

• University of Žilina, Faculty of Mechanical Engineering, Department of Materials Engineering, Univerzitná 8215/1, 01026 Žilina, Slovakia

• https://orcid.org/0000-0002-4823-2279

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).