Macro- and microhardness of IN-713C nickel superalloy constituents

• Autorzy: Binczyk F. , Śleziona J.
• Języki publikacji: EN

Abstrakty

EN

The results of investigations of the effect of modification and cooling rate on the macrohardness of castings and microhardness of phase constituents in IN-713C nickel superalloy were described. As an inoculant, cobalt aluminate CoAl2O4 in composition with aluminium powder and colloidal silica was used. Changes in the cooling rate were obtained using a cast stepped test piece with steps of 6, 11 and 17 mm thickness. Macrohardness of the cast test piece steps was measured by Brinell technique, while Vickers method was used to measure the microhardness of \gamma and \gamma' phases present in the alloy matrix, as well as the hardness of eutectic carbide precipitates. A significant effect of the cooling rate and modification treatment on the results of the measurements was stated, and difficulties in performing correctly the microhardness measurements due to the precipitates dimensions, especially after the modification treatment, were highlighted.

Słowa kluczowe

EN

nickel superalloys; cooling rate; modification; microanalysis; hardness

PL

nadstop niklu; szybkość chłodzenia; modyfikacja; mikroanaliza; twardość

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2009
• Tom: Vol. 9, iss. 4
• Strony: 9--12
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr.

Twórcy

autor

Binczyk F.

autor

Śleziona J.

• Department of Metal Alloys and Composites Engineering, Silesian University of Technology, Krasińskiego Str. 8, 40-019 Katowice, Poland,

Bibliografia

• [1] F. Zupanic, T. Boncina, A. Krizman, F. D. Tichelaar: Structure of continuously cast Ni-based superalloy Inconel 713C, Journal of Alloys and Compounds, volume 329, issue 1-2, November 14, 2001, pp.290-297.
• [2] M. Tabuchi, K. Kubo, K. Yagi, A.T. Yokobori Jr, A. Fuji: Results of a Japanese round robin on creep crack growth evaluation methods for Ni-base superalloys, Engineering Fracture Mechanics, volume 62, issue 1, January 1999, pp. 47-60.
• [3] A. Smith, A. Mainwood, M. Watkins: The kinetics of the capture of nitrogen by nickel defects in diamond, Diamond and Related Materials, volume 11, issue 3-6, March-June, 2002, pp. 312-315.
• [4] M. Lachowicz: Characteristics of microstructural changes and fracture mechanism during welding and heat treatment of Inconel 713C superalloy, Doctor's Thesis, Politechnika Wrocławska, 2006.
• [5] Hartman D., Muerrle U., Reber G.: The effects of electron beam refining on the castability of IN 713 C, Metall, 1992, nr 5, pp.443-447.
• [6] K. H. Kloos, K. Stein: Metallurgia, vol. 38(8), 1984, pp. 740-747.
• [7] Binczyk F., Śleziona J., Cwajna J., Roskosz S.: ATD and DSC analysis of nickel superalloys, Archives of Foundry Engineering, vol. 8, Issue 3, 2008, pp.5-9.
• [8] Binczyk F., Śleziona J.: Macrostructure of IN-713C superalloy after volume modification, Archives of Foundry Engineering, vol. 9, Issue 2, 2009, pp.105-108.
• [9] Binczyk F., Śleziona J.: Phase transformations and microstructure of IN-713C nickel superalloy, Archives of Foundry Engineering, vol. 9, Issue 2, 2009, pp.109-112.
• [10] Binczyk F., Śleziona, J, Kościelna A.: Effect of modification and cooling rate on the macrostructure of IN-713C alloy, Archives of Foundry Engineering, vol. 9, Issue 3, 2009, pp.13-16.