Evaluation of Heat Capacity and Resistance to Cyclic Oxidation of Nickel Superalloys

• Autorzy: Przeliorz R. , Binczyk F. , Gradoń P. , Góral M. , Mikuszewski T.
• Języki publikacji: EN

Abstrakty

EN

Paper presents the results of evaluation of heat resistance and specific heat capacity of MAR-M-200, MAR-M-247 and Rene 80 nickel superalloys. Heat resistance was evaluated using cyclic method. Every cycle included heating in 1100°C for 23 hours and cooling for 1hour in air. Microstructure of the scale was observed using electron microscope. Specific heat capacity was measured using DSC calorimeter. It was found that under conditions of cyclically changing temperature alloy MAR-M-247 exhibits highest heat resistance. Formed oxide scale is heterophasic mixture of alloying elements, under which an internal oxidation zone was present. MAR-M-200 alloy has higher specific heat capacity compared to MAR-M-247. For tested alloys in the temperature range from 550°C to 800°C precipitation processes (γ′, γ′′) are probably occurring, resulting in a sudden increase in the observed heat capacity.

Słowa kluczowe

EN

foundry technology; nickel superalloys; heat resistance; DSC calorimeter; heat capacity

PL

technologie odlewnicze; nadstop niklu; odporność na ciepło; DSC kalorymetru; pojemność cieplna

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 3
• Strony: 67--70
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Przeliorz R.

• Institute of Metals Technology, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

autor

Binczyk F.

• Institute of Metals Technology, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

autor

Gradoń P.

• Institute of Metals Technology, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

autor

Góral M.

• Research and Development Laboratory for Aerospace Materials Rzeszow University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Mikuszewski T.

• Institute of Metals Technology, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

Bibliografia

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• [8] D’Souzaa, N., & Dongb, H.B. (2007). Solidification path in third-generation Ni-based superalloys, with an emphasis on last stage solidification. Scripta Materialia. 56, 41-44.
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• [12] Lee, S.H., Kim S.W. & Kang K.H. (2006). Effect of Heat Treatment on the Specific Heat Capacity of Nickel-Based Alloys. International Journal of Thermophysics. 27(1), 282-292. DOI: 10.1007 /s10765-006-0029-2.