Contribution of Microstructural Constituents on Hot Cracking of MAR-M247 Nickel Based Superalloy

• Autorzy: Rakoczy Ł. , Grudzień M. , Zielińska-Lipiec A.

Identyfikatory

DOI

10.24425/118926

• Języki publikacji: EN

Abstrakty

EN

The aim of this study is to investigate influence of selected parameters of gas tungsten arc welding on microstructure of MAR-M247 nickel based superalloy originating from turbine vane. MAR-M247 is a precipitation-strengthened superalloy which is widely used in aerospace engines. The main strengthening phase in this material is ordered L1₂ intermetallic γ' phase Ni₃ (Al, Ti). The surface of alloy was modified by electric arc in order to present microstructural changes in weld and heat affected zone. Investigation of the heat affected zone revealed that constitutional liquation of γ' particles and primary carbides is responsible for the formation of a liquid grain boundary layer which finally contributed to cracking. Scanning electron microscopy indicated high susceptibility to cracking of MAR-M247 alloy which is connected with high content of γ'-formers aluminum and titanium.

Słowa kluczowe

EN

superalloys; liquation cracking; gamma prime; MAR-M247

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 1
• Strony: 181--189
• Opis fizyczny: Bibliogr. 29 poz., rys., tab.

Twórcy

autor

Rakoczy Ł.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Department of Physical and Powder Metallurgy, Al. Mickiewicza 30, 30-059 Kraków, Poland
• [e-mail]

autor

Grudzień M.

• Foundry Research Institute, 73 Zakopiańska Str., 30-418 Cracow, Poland

autor

Zielińska-Lipiec A.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Department of Physical and Powder Metallurgy, Al. Mickiewicza 30, 30-059 Kraków, Poland

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Uwagi

EN

1. This research work was supported by the Polish Ministry of Science and Higher Education, Grant No. 11.11.110.299.

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).