Investigation of Lost Foam Casted Aluminum Bimetal Microstructures

Kerem Altug Guler; Alptekin Kisasoz; Ahmet Karaaslan

doi:10.3139/120.110625

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Investigation of Lost Foam Casted Aluminum Bimetal Microstructures

Kerem Altug Guler , Alptekin Kisasoz und Ahmet Karaaslan

Veröffentlicht/Copyright: 28. September 2014

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Aus der Zeitschrift Materials Testing Band 56 Heft 9

Abstract

Production and applications of both ferrous and non-ferrous bimetals have been increased due to several advantages and the respective fabrication techniques and procedures are rapidly developing. Liquid metal based fabrication techniques of bimetal production can be classified in two types, i. e., liquid-solid and liquid-liquid processes. Lost foam casting technique can be successfully employed for both liquid-solid and liquid-liquid bimetal composite productions. In this study, A380 and A6063 aluminum alloys were used to produce a bimetallic structure by conventional lost foam casting with the liquid-liquid process. There are two main principles of the liquid-liquid process. Firstly, both alloys are joined in liquid phase and solidified. Secondly, crucible tilting of he metals is carried out synchronously at the same time. The Brinell hardness of the cast specimens was measured and the microstructures of the joint were investigated by light microscope and SEM. Additionally, EDX mapping analysis of the bonding zone was carried out.

Kurzfassung

Die Produktion und die Anwendungen von beiden, eisenhaltigen Bimetallen sowie Nichteisenbimetallen haben aufgrund mehrerer Vorteile zugenommen und die verschiedenen Herstellungstechniken und -verfahren entwickeln sich rapide. Flüssigmetallbasierte Fertigungsverfahren lassen sich in zwei Kategorien, und zwar flüssig-feste und flüssig-flüssige Prozesse, einteilen. Lost-Foam-Gießtechniken können erfolgreich für beides, die flüssig-feste und die flüssig-flüssige Bimetallkompositproduktion eingesetzt werden. In der diesem Beitrag zugrunde liegenden Forschungsarbeit wurden Al 380 und Al 6063 Alumniumlegierungen verwendet, um eine Bimetallstruktur mittels konventionellen Lost-Foam-Gießens im Flüssig-Flüssig-Prozess herzustellen. Hierbei gibt es zwei Hauptprinzipien des Flüssig-Flüssig-Prozesses. Erstens beide Legierungen werden in der flüssigen Phase verbunden und gehärtet. Zweitens das Abkippen der Schmelztiegel der Metalle wird gleichzeitig ausgeführt. Es wurden die Brinellhärte der Gußproben gemessen und das Gefüge im Bereich der Verbindung mittels Lichtmikroskopie und Rasterelektronenmikroskopie untersucht. Zusätzlich wurden EDX-Mapping-Analysen der Bindezone durchgeführt.

*Correspondence Address Assistant Prof. Dr. Kerem Altug Guler Yildiz Technical University Department of Metallurgy and Materials Engineering, Davutpasa Campus TR 34210, Esenler, Istanbul, Turkey E-mail: keremaltug@gmail.com

Kerem Altug Guler, born in 1981, is assistant professor at the Yildiz Technical University, Turkey. He received his MS degree in 2005 and PhD degree in 2012 from the Yildiz Technical University, Turkey in materials science. He is working on several casting techniques like investment casting and lost foam casting and he also researches on metal matrix composites and cellular metals.

Alptekin Kisasoz, born in 1985, received his BS degree in metallurgical and materials engineering from the Yildiz Technical University, Istanbul, Turkey in 2008. He has been employed at the Department of Metallurgical and Materials Engineering in the Yildiz Technical University, Turkey as research assistant since 2009. He received his MSc degree from the same department in 2010. He is working on metal matrix composites, tool steels, and welding metallurgy.

Prof. Dipl.-Ing. Mont. Ahmet Karaaslan, born in 1968, studied metallurgy and materials engineering from 1986 to 1990 at the Yildiz Technical University, Istanbul, Turkey, and received his doctoral degree in 1999 at the Institute for Metals Science and Materials Testing at the Montan-University in Loeben, Austria. Since 1999 he is in the section “Materials Engineering” at the Yildiz Technical University, Turkey.

References

1 B.Xiong, C.Cai, H.Wan, B.Lu: Fabrication of high chromium cast iron and medium carbon steel bimetal by liquid–solid casting in electromagnetic induction field, Materials and Design, Vol. 32, (2011), pp. 2978–298210.1016/j.matdes.2011.01.006Suche in Google Scholar

2 M.Simsir, K. C.Kumruoglu, A.Ozer: An investigation on stainless-steel/structural-alloy-steel bimetal produced by shell mould casting, Materials and Design, Vol. 30 (2009), pp. 264–27010.1016/j.matdes.2008.04.074Suche in Google Scholar

3 J.Sun, X.Song, T.Wang, Y.Yu, M.Sun, Z.Cao, T.Li: The microstructure and property of Al-Si alloy and Al-Mn alloy bimetal prepared by continuous casting, Materials Letters, Vol. 67 (2012), pp. 21–2310.1016/j.matlet.2011.08.112Suche in Google Scholar

4 D. F.Liao, Z.Zhao, X. P.Dong, H. B.Wu: Influence of process parameters on filling ability of A356 aluminum alloy in expendable pattern shell casting with vacuum and low pressure, International Journal of Cast Metals Research, Vol. 25, (2012), pp. 47–5210.1179/1743133611Y.0000000014Suche in Google Scholar

5 Z.Liu, J.Hu, Q.Wang, W.Ding, Y.Zhu, Y.Lu, W.Chen: Evaluation of the effect of vacuum mold filling in the magnesium EPC process, Journal of Materials Processing Technology, Vol. 120 (2002), pp. 94–10010.1016/S0924-0136(01)01085-8Suche in Google Scholar

6 X. J.Liu, S. H.Bhavnani, R. A.Overfelt: Simulation of EPS foam decomposition in the lost foam casting process, Journal of Materials Processing Technology, Vol. 182, (2007), pp. 333–34210.1016/j.jmatprotec.2006.08.023Suche in Google Scholar

7 S. M.Emami, M.Divandari, E.Hajjari, H.Arabi, Comparison between conventional and lost foam compound casting of Al/Mg light metals, International Journal of Cast Metals Research, Vol. 26, (2013), pp. 43–5010.1179/1743133612Y.0000000037Suche in Google Scholar

8 T. S.Piwonka: Molding and casting processes, In D. M.Stefanescu editor, ASM handbook Vol. 15, ASM International, Ohio (1998)Suche in Google Scholar

9 S.Kumar; P.Kumar; H. S.Shan: Characterization of the refractory coating material used in vacuum assisted evaporative pattern casting process, Journal of Materials Processing Technology, Vol. 209 (2009), pp. 2699–270610.1016/j.jmatprotec.2008.06.010Suche in Google Scholar

10 J. H.Hunter: Survey indicates bull market for lost foam foundries, Modern Casting, Vol. 88 (1998), pp. 50–56.Suche in Google Scholar

11 X.Xiaofeng; Y.Shengping; Y.Weixin, X.Qiong: HCWCI/Carbon Steel Bimetal Liner by Liquid- Liquid Compound Lost Foam Casting, Journal of Iron and Steel Research, International, Vol. 19 (2012), pp. 13–1910.1016/S1006-706X(12)60145-9Suche in Google Scholar

12 X.Xiaofeng; Y.Shengping; Y.Weixin, Z.Xiaoguang, X.Qiong: High Cr white cast iron/carbon steel bimetal liner by lost foam casting with liquid-liquid composite process China Foundry, Vol. 9 (2012), pp. 136–142Suche in Google Scholar

13 B.Xiong, C.Cai, B.Lu: Effect of volume ratio of liquid to solid on the interfacial microstructure and mechanical properties of high chromium cast iron and medium carbon steel bimetal, Journal of Alloys and Compounds, Vol. 509 (2011), pp. 6700–6704Suche in Google Scholar

Published Online: 2014-09-28

Published in Print: 2014-09-01

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https://doi.org/10.3139/120.110625