Inverse Modeling for Determination of Thermal Properties of the Investment Casting Ceramic Mold

Abstract

This study presents determination on the thermal properties of investment casting shell molds used in casting process modeling. Superheat and latent heat from solidification and cooling of a casting can either be accumulated by ceramic shell for thin-walled casting or transfer to environment for massive casting. Heat capacity and thermal conductivity both play important roles in casting solidification: Thermal properties of ceramic shell depend on shell composition and fabrication techniques as well as thermal history during shell preparation process due to multiple phase transformations. Inverse modeling was combined with corrected Laser Flash method to determine the applicable thermal properties of the shell during casting solidification. Pure nickel was poured into ceramic shells containing two thermocouples and experimental cooling curves were obtained. These curves were then fitted to the model by adjusting temperature dependent heat capacity and thermal conductivity.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Ceramic shell; Inverse modeling; Investment casting; Thermal properties

International Standard Book Number (ISBN)

978-111829615-8

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 The Minerals, Metals & Materials Society, All rights reserved.

Publication Date

15 May 2012

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