Accessible Unlicensed Requires Authentication Published by De Gruyter May 26, 2013

Drilling Template Used to Produce Cellular EPS Patterns for the Lost Foam Casting Process

Bohrschablonen für die Herstellung von zellulären EPS Mustern mittels des Ausschmelz-Gießverfahrens
Kerem Altug Guler, Ates Uster and Mustafa Cigdem
From the journal Materials Testing

Abstract

Cellular metals differ from the other materials by a lower density which is their characteristic property. Besides, they show unusual physical, mechanical, thermal, acoustic and electrical properties. Even though they have lots of pores compared to solid materials they can show a unique combination of several properties that cannot be obtained in a conventional material at the same time. There are several kinds of production methods for cellular materials. Nowadays, lots of researches have been carried out with respect to new production methods. The lost foam process, which bases on evaporating the polystyrene foam model, reduces the process steps of investment casting and can be an alternative method to many production methods. In this study, open cell samples were produced with two different aluminium alloys by using the lost foam casting technique. A413 as a casting alloy and A6063 as a wrought alloy were selected for casting experiments. After production of these two aluminium alloys, the decrease in weight, compression strengths, deformation ratios were determined and compared to each other.

Kurzfassung

Zelluläre Materialien unterscheiden sich von anderen Werkstoffen durch eine geringere Dichte, was ihre charakteristische Eigenschaft ausmacht. Darüber hinaus zeigen sie unübliche physikalische, mechanische, thermische, akustische und elektrische Eigenschaften. Trotz der großen Porenanzahl gegenüber Massivmaterialien können sie eine einzigartige Kombination von mehreren Eigenschaften aufweisen, die in einem konventionellen Werkstoff zeitgleich nicht realisiert werden kann. Es gibt verschiedene Produktionsverfahren für zelluläre Materialien. Heutzutage wird vielfach im Bereich neuer Produktionsverfahren geforscht. Das Schaumblasverfahren basiert auf dem Ausgasen des Polystyrol-Schaummodells und reduziert die Prozessschritte des Präzisionsfeingießens, so dass es ein alternatives Verfahren zu vielen Produktionsprozessen darstellt. In der diesem Beitrag zugrunde liegenden Studie wurden offenzellige Proben aus zwei Aluminiumlegierungen mittels Schaumausblasverfahrens hergestellt. Dabei kamen die Gußlegierung A413 und die Knetlegierung A6063 zum Einsatz. Nach dem Herstellungsprozess dieser beiden Legierungen wurden die Gewichtsabnahme, die Druckfestigkeiten und die Verformungsverhältnisse bestimmt und miteinander verglichen.


Kerem Altug Guler was born in 1981, he is research assistant at the Yildiz Technical University, Turkey since 2004. He received his M.S. degree in 2005 and Ph.D. degree in 2012 at the Yildiz Technical University, Turkey in Materials Science. He is also co-researcher in Balkan Centre of Advanced Casting Technologies (BCACT).

Ates Uster was born in Istanbul, Turkey in 1977. He graduated from the department of Metallurgical Engineering in 2000. He worked in several industrial companies as engineer. He received his M.S. degree in 2010 at Yildiz Technical University, Turkey. Presently he has been working in Anadolu Motor A.S.

Mustafa Cigdem was born in 1964. He is professor of Metallurgy and Materials at Yildiz Technical University, Turkey since 2000. He graduated as metallurgical engineer from Istanbul Technical University, Turkey in 1985. He received his master degree (M.Phil.) and Ph.D. in Metallurgy and Materials Science, in 1988 and 1990, respectively, both from the University of Birmingham, England.


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Published Online: 2013-05-26
Published in Print: 2013-01-01

© 2013, Carl Hanser Verlag, München