Study of cooling rate effect on mikrosegregation behaviour and structural heterogeneity of in 738LC superalloy

• Autorzy: Dobrovska J. , Docekalova S. , Dobrovska V. , Stránský K.
• Konferencja: Metody oceny struktury oraz własności materiałów i wyrobów/sympozjum ( XXII ; 6-8.XI.2007 ; Svratka, Czechy)
• Języki publikacji: EN

Abstrakty

EN

Nickel based alloys are characterised during solidification by intensive dendritic segregation of elements [1-3]. Nickel based superalloys are widely used in turbine blades and other engine parts. IN 738LC is a modified version of superalloy IN 738 with enhanced carbide stability, castability and ductility, achieved by lowering the carbon content. IN 738LC alloy is well known alloy, however, not many studies have been reported on microsegregation of elements during solidification and on effect of cooling rate on microsegregation. The paper deals with the effect of cooling rate on solidification behaviour of IN 738LC nickel based superalloy and on resulting structural and chemical microheterogeneity of this alloy.

Słowa kluczowe

EN

cooling rate effect; microsegregation behaviour; 738LC superalloy

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2007
• Tom: Vol. 321, z. 89
• Strony: 95--96
• Opis fizyczny: Bibliogr. 9 poz., il., tab., wykr.

Twórcy

autor

Dobrovska J.

autor

Docekalova S.

autor

Dobrovska V.

autor

Stránský K.

• VŠB-TU Ostrava

Bibliografia

• [1] TANCRET F., BHADESHIA H.K.D.H., MACKAY D.J.C.: Design of new creepresistant nickel-base superalloys for power-plant applications. Key Engineering Materials, Vols. 171-174, 2000, 529-536.
• [2] FLORIAN M.: Microsegregation in directionally solidified Ni-based superalloy. Kovove Mater, Vol. 38, No. 5, 2000, 305-314.
• [3] TANCRET F., BHADESHIA H.K.D.H.: Design of a creep resistant nickel base superalloy for power plant applications. Part 2 – Phase diagram and segregation simulation. Mater. Sci. Technol., Vol. 19, 2003, 291-295.
• [4] VODÁREK V.: Electron-microscopy and micro-analysis of samples of the alloy IN 738LC. Research report. Vítkovice Research and Development Ltd, June 2006
• [5] REK A., STRÁNSKÝ K.: Heterogeneity of nickel alloy IN 738LC with various cooling rates. Research report. VTÚO Brno, August 2006.
• [6] KIM H.C. et al.: Microstructure evolution with solidification rates in IN 783LC superalloy. Materials Science Forum, Vols. 510-511, 2006, 450-453.
• [7] CHAPMAN L.A.: Application of High Temperature DSC Technique to Nickel Based Superalloys. J. Mater. Sci. 39, 2004, 7229-7236.
• [8] GUNGOR M.N.: A Statistically Significant Experimental Technique for Investigating Microsegregation in Cast Alloys. Metall. Trans. A, Vol. 20, 1989, 2529-2533.
• [9] DOBROVSKA J. et al.: Possible Ways of Prediction of the Distribution Curves of Dendritic Segregation of Alloying Elements in Steels. Scripta Mater., Vol. 38, 1998, 1583-1588.