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Scientific Bulletin of Valahia University - Materials and Mechanics

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Determination of Overall Heat Transfer Coefficient by Simple Thermal Analyze

Mirela Popescu / Tibor Bedo / Bela Varga
Published Online: 2016-10-26 | DOI: https://doi.org/10.1515/bsmm-2016-0002

Abstract

To know more precise the value of overall heat transfer coefficient is on a special importance to programs (software) that models the solidification process for project casting technology in order to optimize them by dimensioning and appropriate placement both the gating system and the risers for eliminate casting defects, shrinkages. The paper aims to determin the value of overall heat transfer coefficient on the cooling curve recorded in casting-solidification real conditions. The values obtained for the overall heat transfer coefficient (2.34 to 25.41) · 10−4 [cal/s.grad.cm2]) for different casting conditions prove that this parameter can not be considered as a constant of the casting mould material.

Keywords: overall heat transfer coefficient; thermal analyze; cooling curve; mould vibration; aluminium alloy

5. REFERENCES

    Journals:

    • [1] Varga Bela, Musteaţă Florin, Ciobanu Ioan, Bedo Tibor, Munteanu Ion Sorin, Crişan Aurel: Study on Shrinkage Development Inside an Al-Si Alloy Casting by Computer Solidification Simulation, , RECENT Vol. 17, no. 1(47), March, 2016, pp. 55-68Google Scholar

    • [2] Bedo Tibor, Dăian Marcel, Varga Bela, Stoicănescu Maria, Crişan Aurel, Ciobanu Ioan: A Simulation and Experiment Concerning the Solidification of an Al-Zn Alloy Casting, RECENT, Vol. 17, no. 2(48), July, 2016, pp. 83Google Scholar

    • [3] Bencomo A., Bisbal R., Morales, R.: Simulation of the aluminum alloy A356 solidification cast in cylindrical permanent molds, Revista Matéria, v. 13, n. 2, pp. 294 – 303, 2008Google Scholar

    • [4] Konopka Z., Łągiewka M., Zyska A.: Evaluation of the heat transfer coefficient at the metal-mould interface during flow, Archives of Foundry Engineering, Volume 7, Issue 4/2007, 101-104Google Scholar

    • [5] Ulkarni S.N. K., Adhakrishna D.K. R: Effect of casting/mould interfacial heat transfer during solidification of aluminium alloys cast in CO2-sand mould, Materials Science-Poland, 29(2), 2011, pp. 135-142Google Scholar

    • [6] Jabbari M., Fardi Ilkhchy A., Davami P.: Effect of pressure on heat transfer coefficient od A356 aluminium alloy, Journal of Materials Science and Engineering with Advanced Technology, Volume 4, Number 1, 2011, Pp 1-20Google Scholar

    • [7] Sahin H. M., Kocatepe K., Kayıkcı R., Akar N.: Determination of unidirectional heat transfer coefficient during unsteady-state solidification at metal casting–chill interface, Energy Conversion and Management 47 (2006) 19–34CrossrefGoogle Scholar

    • [8] Felczak, G. De Mey and B. Więcek, Determination of the heat transfer coefficient distribution, Quantitative InfraRed Thermography, 2016, pp 236-241Google Scholar

    • [9] Fardi Ilkhchy A., Varahraam N., Davami P., Evaluation of Pressure Effect on Heat Transfer Coefficient at The Metal-Mold Interface For Casting of A356 Al Alloy, Iranian Journal of Materials Science & Engineering Vol. 9, Number 1, March 2012Google Scholar

    • [10] Fardi Ilkhchy A., Jabbari M., Davami P., Effect of pressure on heat transfer coefficient at the metal/mold interface of A356 aluminum alloy, International Communications in Heat and Mass Transfer 39 (2012) 705–712Google Scholar

    • [11] Jer-Haur Kuo, Ruey-Jer Weng, Weng-Sing Hwang Effects of Solid Fraction on the Heat Transfer Coefficient at the Casting/Mold Interface for Permanent Mold Casting of AZ91D Magnesium Alloy Materials Transactions, Vol. 47, No. 10 (2006) pp. 2547 to 2554, The Japan Institute of MetalsGoogle Scholar

    • [12] Alloy Kuo J H, Hsu F L, Hwang W S, Yeh J L, Chen S J Effects of Mold Coating and Mold Material on the Heat Transfer Coefficient at the Casting / Mold Interface for Permanent Mold Casting of A356 Aluminum Transactions of American Foundry Society, Volume 109, Pp 1-17, 2001Google Scholar

    • [13] Pedram Mehraram, Measuring Heat Transfer during Twin Roll Casting of Metals, A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Master of Applied Science in Mechanical Engineering Waterloo, Ontario, Canada, 2010, pp. 115Google Scholar

    • [14] Pehlke R.D., John M. Cookson, Shouwei Hao, Prasad Krishna, Kevin T. Bilkey: Heat Transfer at the Mold - Metal Interface in Permanent Mold Casting of Aluminum Alloys Project Final Report Department of Materials Science and Engineering The University of Michigan Ann Arbor, MI 48109-2136 December 14,200 1 Prepared for THE U.S. DEPARTMENT OF ENERGY AWARD NO. DE-FC07-97ID13559Google Scholar

    • [15] Mirela Popescu, Bela Varga: Structures of Aluminium Base Alloys Solidified by Vibrations, in Advanced Materials Research, vol. 1128, Advanced Technologies of Materials Processing, 2015, pp. 88-97.Google Scholar

About the article

Published Online: 2016-10-26

Published in Print: 2016-10-01


Citation Information: Scientific Bulletin of Valahia University - Materials and Mechanics, Volume 14, Issue 11, Pages 11–16, ISSN (Online) 2537-3161, DOI: https://doi.org/10.1515/bsmm-2016-0002.

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© 2016 Mirela Popescu et al., published by De Gruyter Open. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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