Effect of Copper Variation and Thermomechanical Treatment on Microstructure and Properties in Aluminum Alloy Fin Stock for Heat Exchanger

Suk Bong Kang; Dong Bae Kim; Jae Hyung Cho

doi:10.4028/www.scientific.net/MSF.706-709.311

Paper Titles

Modeling of Heat Treatment of Randomly Distributed Loads in Multi-Zone Continuous Furnaces
p.289

Effect of Strain Rate on Hydrogen Evolution during Deformation in Al-Zn-Mg Alloys
p.295

Effect of Rapid Solidification on Microstructural Features of Al-Cr Alloys
p.301

Effect of Heat Treatments and Small Addition of Fe on the Occurrence of Serration in Al-Zn Alloys
p.305

Effect of Copper Variation and Thermomechanical Treatment on Microstructure and Properties in Aluminum Alloy Fin Stock for Heat Exchanger
p.311

Precipitation in Al-Alloy 6016 – The Role of Excess Vacancies
p.317

Through Process Microchemistry Effects on the Properties of 8xxx Sheet
p.323

The Effect of Erbium on the Properties and Microstructure of Al Alloys
p.329

Microstructure and Properties of an Al-7.5Zn-1.5Mg-1.4Cu-0.12Zr Alloy Forging
p.335

HomeMaterials Science ForumMaterials Science Forum Vols. 706-709Effect of Copper Variation and Thermomechanical...

Effect of Copper Variation and Thermomechanical Treatment on Microstructure and Properties in Aluminum Alloy Fin Stock for Heat Exchanger

Abstract:

Aluminum alloys are commonly used as a material for heat exchangers due to their higher thermal conductivity and specific strength among various metallic materials. Twin roll strip casting process is considered to produce the high quality and low manufacturing cost aluminum alloy fin stock for automobile heat exchangers. Thermomechamical treatment has carried out to obtain optimum processes for initial cold rolling, intermediate annealing and final cold rolling, which can meet the requirements for high strength and high thermal conductivity after brazing heat treatment. Additionally the effect of copper element variation was considered to determine the optimum content of copper element in Al-Zn-Mn-Si-Fe-Cu based alloys produced by twin roll strip casting process. Mechanical properties and thermal condutivity have been evaluated before and after simulated brazing process. The nuclei of recrystallization might be formed along shear deformation bands during initial cold rolling and should be grown during intermediate annealing to enhance the permeation of molten brazings for the following brazing process. Final cold rolling has allowed strain hardening and controlling of sagging amount as fin stock materials of heat exchanger. In the present study the suitable thermomechnical treatment and optimum copper content was suggested to balance the properties of strength, thermal conductivity, brazing behaviour, corrosion resistance and sagging resistance in Al-Zn-Mn-Si-Fe-Cu based alloys produced by twin roll strip casting process.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volumes 706-709)

Pages:

311-316

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.706-709.311

Citation:

Cite this paper

Online since:

January 2012

Authors:

Suk Bong Kang, Dong Bae Kim, Jae Hyung Cho

Keywords:

Aluminium Fin Stock, Sagging Resistance, Tensile Strength, Thermal Conductivity (TC), Thermomechanical Treatment (TMT), Twin Roll Cast

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

References

[1] M. Ferry, Direct strip casting of metals and alloys –processing, microstructure and properties, Woodhead Publishing Ltd, (2006).

Google Scholar

[2] B. Forbord, B. Andersson, F. Ingvaldsen, O. Austevik, J.A. Horst and I. Skauvik: Mater. Sci. Eng. A 415 (2006) 12-20.

DOI: 10.1016/j.msea.2005.08.224

Google Scholar

[3] A. Gray: Aluminum in Automotive Heat Exchangers – Closing the Technology Gap, 8th International Brazing Seminar.

Google Scholar

[4] M. Slamova, M. Karlik, M. Cieslar, B. Chalupa and P. Merle: Kovove Materialy, 41, 2003, 51-62.

Google Scholar

[5] M. Slamova, P. Homola and M. Karlik: Mater Sci Eng A 462, 2007, 106-110.

Google Scholar

[6] S.B. Kang, D.B. Kim, K. Euh and H.W. Kim, in: Aluminum Alloys, edited by J. Hirsch, B. Skrotzki and G. Gottstein, Wiley-Vch GmbH & Co. KgaA(2008), p.562.

Google Scholar