Analysis of temperature distribution in shell mould during thin-wall superalloy casting and its effect on the resultant microstructure

• Autorzy: Rakoczy Ł. , Cygan R.

Identyfikatory

DOI

10.1016/j.acme.2018.05.008

• Języki publikacji: EN

Abstrakty

EN

This work focuses on the influence of temperature distribution in a shell mould during investment casting of thin wall parts on macrostructure, chemical composition of microstructural constituents and γ/γ′ misfit parameter. A reduction of production costs is associated with the optimization of precision casting technology of aircraft engine critical parts, including control of the solidification front in thin-walled castings of nickel superalloys. Appropriate lost-wax casting parameters lead to the creation of coarse grained structure, desired for high-temperature service applications. As a result of non-equilibrium solidification, substantially large chemical inhomogeneities in the dendrite core and interdendritic spaces are formed. Interdendritic spaces are occupied by constituents formed as a consequence of segregation of alloying elements, namely eutectic islands γ/γ′, borides, carbides, and an intermetallic compound of Ni and Zr. Dendrite cores consist of cubic-shaped γ′ precipitates surrounded by Ni-rich γ channels. Low lattice misfit influences cubic morphology of γ′ precipitates, which is favourable for jet engine application because it can guarantee good creep resistance.

Słowa kluczowe

EN

nickel-based superalloys; ceramic mould; thin-walled castings; investment casting; aviation

PL

forma ceramiczna; odlew; lotnictwo

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2018
• Tom: Vol. 18, no. 4
• Strony: 1441--1450
• Opis fizyczny: Bibliogr. 33 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, Mickiewicza 30, 30-059 Cracow, Poland

autor

Cygan R.

• Consolidated Precision Products, Investment Casting Division CPP-Poland, ul. Hetmanska 120, 35-078 Rzeszow, Poland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)