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The Effect of Homogenization and Chemical Compositions of 6005 and 6082 Aluminium Alloys on The Cold Forming Process

Year 2021, Issue: 28, 16 - 20, 30.11.2021
https://doi.org/10.31590/ejosat.973063

Abstract

Aluminium alloys are one of the most preferred materials in the automotive industry due to their properties such as easy recyclability, easy formability and high specific strength. 6XXX alloys are especially used in automotive parts due to their good mechanical properties such as high corrosion and high fatigue strength.6XXX alloys are cast as billets or ingots by continuous casting methods. The alloys are subjected to homogenization heat treatment and shaped by extrusion, respectively. During extrusion forming, fibers are formed in the profile in the direction of extrusion. It has been observed that the coarseness of these fibers formed in the extrusion process causes undesirable deep tears, cracks and distortion of surface when the aluminium profiles are subjected to the cold forming process. In this study, cracking and surface deformations are completely eliminated that occurred after cold forming thanks to alloy improvements and heat treatment. The cold forming process is modeled with the finite element method in order to control surface deformations due to cold forming. Alloy enhancement and homogenization heat treatment applied samples were subjected to cold forming process. As a result, the homogenization heat treatment applied to the part produced from the alloy with improved chemical composition eliminated the deep tears, residual stresses and invisible heterogeneities in the grain structure.

References

  • Standart Specification for Aluminium Alloy Extruded Bars, Rods, Wire, Profiles and Tubes. ASTM, Designation: B221M-12a
  • Zhouli Xu, Huijuan Ma, Ning Zhao, and Zhili Hu , Investigation on Compressive Formability and Microstructure Evolution of 6082-T6 Aluminum Alloy, J. of Metals, 10, 469-480, (2020)
  • Saha Pradip K., Aluminium extrusion technology, Materials Park, OH 44073-0002, ISBN: 0-87170-644-X, pp(136-138), (2000)
  • Birol Y., The effect of homogenization practice on the microstructure of AA6063 billets, Journal of Materials Processing Technology, 148(2):250-258, (2004)
  • Beatty E.C., Proceedings of the First International Aluminium Extrusion Technology Seminar, Paper no. 10, Aluminium Association, Washington, DC, 1969.
  • Mrówka-Nowotnik, G., Sieniawski, J., Wierzbińska, M.. Intermetallic phase particles in 6082 aluminium alloy, Archives of Materials Science and Engineering 282, 69-76, (2007).
  • Kuijpers N.C.W., Tirel J., Hanlon, Zwaag D.N. S., Quantification of the evolution of the 3D intermetallic structure in a 6005A aluminium alloy during a homogenisation treatment, Materials Characterization, 48 pp. 379-392, (2002)
  • T. Smith, Reilly K. O´, Kumar S., I. Stone, Influence of Grain-Refiner Addition on the Morphology of Fe-Bearing Intermetallics in a Semi-Solid Processed Al-Mg-Si Alloy, Metallurgical and Materials Transactions., 44A, pp. 4866-4871, (2013)
  • Dons A.L., The Alstruc homogenization model for industrial aluminum alloys, Journal of Light Metals., 1 pp. 133-149, (2001)
  • Bayata N., Cieslarb M., In-situ study of phase transformations during homogenization of 6005 and 6082 Al alloys, Journal of Alloys and Compounds, 725, 25, Pp 504-509, (2017)
  • M. Çiğdem and Y. Erarslan "The Effect of Mould Lubrication on The Surface And Subsurface Quality of Semi Continiously DC cast Al-6063 alloy billets" Practical Metallography, 34, 11, 555-573,(1997)
  • Yucel B. The effect of processing and Mn content on the T5and T6 properties of AA6082 Profiles, Journal of Materials Processing Technology 173, 84–91,(2006)
  • J. Van Rijkom, W.S. Miller, Proc. 6th International Aluminium Extrusion Technology Seminar, Vol. 1, Aluminium Association, , 149-155 Washington, DC, (1996)

6005 ve 6082 Alüminyum Alaşımlarının Homojenizasyon ve Kimyasal Bileşimlerinin Soğuk Şekillendirmeye Etkisi

Year 2021, Issue: 28, 16 - 20, 30.11.2021
https://doi.org/10.31590/ejosat.973063

Abstract

Alüminyum alaşımları kolay geri dönüştürülebilirlik, kolay şekillendirilebilirlik ve yüksek özgül mukavemet gibi özelliklerinden dolayı otomotiv endüstrisinde en çok tercih edilen malzemelerdendir. 6XXX alaşımları, yüksek korozyon ve yüksek yorulma mukavemeti gibi iyi mekanik özelliklerinden dolayı özellikle otomotiv parçalarında kullanılmaktadır.6XXX alaşımları sürekli döküm yöntemleriyle biyet veya ingot olarak dökülmektedir. Alaşımlar sırasıyla homojenizasyon ısıl işlemine tabi tutulur ve ekstrüzyonla şekillendirilir. Ekstrüzyon şekillendirme sırasında, ekstrüzyon yönünde lifler oluşabilmektedir ve ekstrüzyon işleminde oluşan bu liflerin kabalığının, alüminyum profiller soğuk şekillendirme işlemine tabi tutulduğunda istenmeyen derin yırtılmalara, çatlaklara ve yüzeyde bozulmalara neden olduğu gözlemlenmiştir. Bu çalışmada, alaşımdaki kimyasal bileşimlerin ve uygulanan homojenizasyon ısıl işleminin soğuk şekillendirme sonrası oluşan çatlama ve yüzey deformasyonlarına etkisi gözlenmiştir. Soğuk şekillendirmeden kaynaklanan yüzey deformasyonlarını kontrol etmek için soğuk şekillendirme işlemi sonlu elemanlar yöntemi ile modellenmiştir. Alaşım geliştirme ve homojenizasyon ısıl işlemi uygulanan numuneler soğuk şekillendirme işlemine tabi tutulmuştur. Sonuç olarak, geliştirilmiş kimyasal bileşime sahip alaşımdan üretilen parçaya uygulanan homojenizasyon ısıl işlemi, tane yapısındaki derin yırtıkları, artık gerilmeleri ve gözle görülmeyen heterojenlikleri ortadan kaldırmıştır.

References

  • Standart Specification for Aluminium Alloy Extruded Bars, Rods, Wire, Profiles and Tubes. ASTM, Designation: B221M-12a
  • Zhouli Xu, Huijuan Ma, Ning Zhao, and Zhili Hu , Investigation on Compressive Formability and Microstructure Evolution of 6082-T6 Aluminum Alloy, J. of Metals, 10, 469-480, (2020)
  • Saha Pradip K., Aluminium extrusion technology, Materials Park, OH 44073-0002, ISBN: 0-87170-644-X, pp(136-138), (2000)
  • Birol Y., The effect of homogenization practice on the microstructure of AA6063 billets, Journal of Materials Processing Technology, 148(2):250-258, (2004)
  • Beatty E.C., Proceedings of the First International Aluminium Extrusion Technology Seminar, Paper no. 10, Aluminium Association, Washington, DC, 1969.
  • Mrówka-Nowotnik, G., Sieniawski, J., Wierzbińska, M.. Intermetallic phase particles in 6082 aluminium alloy, Archives of Materials Science and Engineering 282, 69-76, (2007).
  • Kuijpers N.C.W., Tirel J., Hanlon, Zwaag D.N. S., Quantification of the evolution of the 3D intermetallic structure in a 6005A aluminium alloy during a homogenisation treatment, Materials Characterization, 48 pp. 379-392, (2002)
  • T. Smith, Reilly K. O´, Kumar S., I. Stone, Influence of Grain-Refiner Addition on the Morphology of Fe-Bearing Intermetallics in a Semi-Solid Processed Al-Mg-Si Alloy, Metallurgical and Materials Transactions., 44A, pp. 4866-4871, (2013)
  • Dons A.L., The Alstruc homogenization model for industrial aluminum alloys, Journal of Light Metals., 1 pp. 133-149, (2001)
  • Bayata N., Cieslarb M., In-situ study of phase transformations during homogenization of 6005 and 6082 Al alloys, Journal of Alloys and Compounds, 725, 25, Pp 504-509, (2017)
  • M. Çiğdem and Y. Erarslan "The Effect of Mould Lubrication on The Surface And Subsurface Quality of Semi Continiously DC cast Al-6063 alloy billets" Practical Metallography, 34, 11, 555-573,(1997)
  • Yucel B. The effect of processing and Mn content on the T5and T6 properties of AA6082 Profiles, Journal of Materials Processing Technology 173, 84–91,(2006)
  • J. Van Rijkom, W.S. Miller, Proc. 6th International Aluminium Extrusion Technology Seminar, Vol. 1, Aluminium Association, , 149-155 Washington, DC, (1996)
There are 13 citations in total.

Details

Primary Language English
Subjects Engineering
Journal Section Articles
Authors

Havva Demirpolat 0000-0002-2981-9867

Seracettin Akdı 0000-0002-4814-8982

Bülent Alkan 0000-0003-1048-7986

Publication Date November 30, 2021
Published in Issue Year 2021 Issue: 28

Cite

APA Demirpolat, H., Akdı, S., & Alkan, B. (2021). The Effect of Homogenization and Chemical Compositions of 6005 and 6082 Aluminium Alloys on The Cold Forming Process. Avrupa Bilim Ve Teknoloji Dergisi(28), 16-20. https://doi.org/10.31590/ejosat.973063