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Titre du document / Document title

Alloy shrinkage factors for the investment casting process

Auteur(s) / Author(s)

SABAU Adrian S. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6083, ETATS-UNIS

Résumé / Abstract

This study deals with the experimental measurements and numerical predictions of alloy shrinkage factors (SFs) related to the investment casting process. The dimensions of the A356 aluminum alloy casting were determined from the numerical simulation results of solidification, heat transfer, fluid dynamics, and deformation phenomena. The investment casting process was carried out using wax patterns of unfilled wax and shell molds that were made of fused silica with a zircon prime coat. The dimensions of the die tooling, wax pattern, and casting were measured, in order to determine the actual tooling allowances. Several numerical simulations were carried out, to assess the level of accuracy for the casting shrinkage. The solid fraction threshold, at which the transition from the fluid dynamics to the solid dynamics occurs, was found to be important in predicting shrinkage factors (SFs). It was found that accurate predictions were obtained for all measured dimensions when the shell mold was considered a deformable material.

Revue / Journal Title

Metallurgical and materials transactions. B, Process metallurgy and materials processing science    ISSN  1073-5615 

Source / Source

2006, vol. 37, no1, pp. 131-140 [10 page(s) (article)] (21 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (1994) (Revue)

Mots-clés anglais / English Keywords

Pouring

;

Foundry

;

Shrinkage

;

Mots-clés français / French Keywords

Coulée

;

Fonderie

;

Retrait

;

Mots-clés espagnols / Spanish Keywords

Colada

;

Fundería

;

Retiro

;

Localisation / Location

INIST-CNRS, Cote INIST : 3179 B, 35400013480208.0090

Nº notice refdoc (ud4) : 17497236



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