Effect of Cobalt Aluminate Content and Pouring Temperature on Macrostructure, Tensile Strength and Creep Rupture of Inconel 713C Castings

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

Identyfikatory

DOI

10.24425/123845

• Języki publikacji: EN

Abstrakty

EN

The effect of cobalt aluminate inoculant addition and melt-pouring temperature on the structure and mechanical properties of Ni-based superalloy was studied. The first major move to control the quality of investment cast blades and vanes was the control of grain size. Cobalt aluminate (CoAl₂ O₄ ) is the most frequently utilized inoculant in the lost-wax casting process of Ni-based superalloys. The inoculant in the prime coat of moulds and pouring temperature play a significant role in grain size control. The finest surface grains were obtained when the internal surface of shell mould was coated with cobalt aluminate and subsequently pouring was at 1480°C. The influence of selected casting parameters and inoculant addition on mechanical properties was investigated on the basis of tensile, creep and hardness testing. The effect of grain refinement on mechanical properties were consistent with established theories. Tests conducted at ambient temperature indicated a beneficial effect of grain refinement both on tensile strength and hardness. In contrast at elevated temperature during creep, the reverse trend was observed.

Słowa kluczowe

EN

pouring; investment casting; lost wax; superalloy; creep

• 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. 3
• Strony: 1537--1545
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

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

autor

Grudzień M.

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

autor

Cygan R.

• Consolidated Precision Products Poland, 120 Hetmanska Str., 35-078 Rzeszow, 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

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Uwagi

EN

1. This research work was supported by National Centre for Research and Development, Grant No. LIDER/227/L-6/14/NCBR/2015. The authors wish to express appreciation to Prof. A.S. Wronski for the discussion and language correction of manuscript.

PL

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