The Influence of Macrostructure of Nickelbased Superalloys IN713C and MAR 247 on the Characteristics of High-temperature Creep

• Autorzy: Cieśla M. , Binczyk F. , Mańka M. , Findziński R.

Identyfikatory

DOI

10.2478/afe-2014-0077

• Języki publikacji: EN

Abstrakty

EN

The study consisted in assessing the influence of surface and volume modification on the characteristics of high-temperature creep of castings made of waste products of nickel-based superalloys IN 713C and the MAR-247. The results of high-temperature creep tests performed under conditions of two variants of research were analysed. The characteristics of creep according to variant I were obtained on the basis of earlier studies of these alloys with the parameters T=982^oC, σ=150MPa [1]. Variant II included carrying out creep tests of alloy IN713C with the parameters T=760^oC, σ =400MPa and alloy MAR247 with the parameters: T=982^oC, σ=200MPa.Developed creep characteristics were compared with the results of these alloys with the parameters according to variant I of the study. It was observed that the conditions of experiments carried out depending upon the value of the creep test temperature and stress with the creep stability depends on the size of the macrograin (I variant of the studies) or such influence was not observed (II variant of the studies). Stability of samples with coarse structure in variant I of creep tests was significantly higher than the samples with fragmented grain. It was found that the observed stability conditions are dependent on the dominant deformation mechanisms under creep tests carried out - diffusion mechanism in variant I and a dislocation mechanism in variant II of the study. The conditions for the formation and growth of the cracks in the tested materials, including the morphological characteristics of their macro-and microstructure were tested.

Słowa kluczowe

EN

nickel alloy IN-713C; superalloy Mar-247; macrostructure; modification; creep

PL

stop niklu IN-713C; nadstop Mar-247; modyfikacja

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 4
• Strony: 11--16
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Cieśla M.

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

autor

Binczyk F.

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

autor

Mańka M.

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

autor

Findziński R.

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

Bibliografia

• [1] Cieśla, M., Binczyk, F. & Mańka, M. (2012). Impact of surface and volume modification of nickel superalloys IN-713C and MAR-247 on high temperature creep resistance. Archives of Foundry Engineering. 12(4), 17-24
• [2] Cieśla, M., Binczyk, F. & Mańka, M. (2014). The effect of heat treatment on creep resistance of castings from the modified superalloy MAR-247. Solid State Phenomena. 212, 229-236.
• [3] Cieśla, M., Binczyk, F. & Mańka, M. (2014). Analysis of cracking process in conditions of high-temperature creep of castings form the modified superalloy IN-713C. Solid State Phenomena. 212, 247-254.
• [4] Cieśla, M., Mańka, M., Gradoń, P. Binczyk, F.(2013). Effect on the stability of the structure under conditions of creep modified nickel-based superalloys, Prace Szkoły InŜynieriii Materiałowej XLI, Kryunica, p.82-86.
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