Effect of Alloy Composition and Pre-Ageing on the Stretch Formability of 6xxx Automotive Sheet Alloys

Hao Zhong; Ling Fei Cao

doi:10.4028/www.scientific.net/MSF.941.955

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HomeMaterials Science ForumMaterials Science Forum Vol. 941Effect of Alloy Composition and Pre-Ageing on the...

Effect of Alloy Composition and Pre-Ageing on the Stretch Formability of 6xxx Automotive Sheet Alloys

Abstract:

In this study, the effect of Mg/Si ratio, Cu content and/or pre-ageing treatment (e.g. 100 °C for 2 h and/or 200 °C for 20 s) on the stretch formability of 6xxx alloys was investigated through their influence on the work hardening and strain-rate hardening behaviour using tensile testing and forming limit diagram tests. The results showed that a high Mg/Si ratio, a low Cu content and/or the employment of pre-ageing could deteriorate the stretch formability due to the decrease in work hardening and/or strain rate hardening capabilities. Moreover, the stretch formability was observed to have an opposite correlation with the paint-bake response of the alloys studied.

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Periodical:

Materials Science Forum (Volume 941)

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955-960

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.941.955

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Online since:

December 2018

Authors:

Hao Zhong, Ling Fei Cao*

Keywords:

6xxx Automotive Sheet Alloys, Composition, Pre-Ageing, Stretch Formability

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References

[1] E. Brünger, O. Engler and J. Hirsch, Al-Mg-Si sheet alloys for autobody applications, in: J. Hirsch (Eds.), Virtual fabrication of aluminium products: microstructural modeling in industrial aluminum fabrication processes, Wiley-Vch Verlag Gmbh&Co, Weinheim, 2006, pp.51-63.

Google Scholar

[2] H. Zhong, P.A. Rometsch, X.D. Wu, L.F. Cao and Y. Estrin, Influence of pre-ageing on the stretch formability of Al-Mg-Si automotive sheet alloys, Mater. Sci. & Eng. A 697 (2017) 79-85.

DOI: 10.1016/j.msea.2017.05.009

Google Scholar

[3] A.K. Ghosh, The influence of strain hardening and strain-rate sensitivity on sheet metal forming, J. Eng. Mater. & Techno. 93 (1977) 264-274.

DOI: 10.1115/1.3443530

Google Scholar

[4] H. Zhong, P.A. Rometsch, and Y. Estrin, The influence of Si and Mg content on the microstructure, tensile ductility, and stretch formability of 6xxx alloys, Metall. & Mater. Trans. A 44 (2013) 3970-3983.

DOI: 10.1007/s11661-013-1740-9

Google Scholar

[5] H. Zhong, P.A. Rometsch, L.F. Cao, Y. Estrin, The influence of Mg/Si ratio and Cu content on the stretch formability of 6xxx aluminium alloys, Mater. Sci. & Eng. A 651 (2016) 688-697.

DOI: 10.1016/j.msea.2015.11.016

Google Scholar

[6] H. Zhong, P.A. Rometsch, Q.Q. Zhu, L.F. Cao, Y. Estrin, Effect of pre-ageing on dynamic strain ageing in Al-Mg-Si alloys, Mater. Sci. & Eng. A, 687 (2017) 323-331.

DOI: 10.1016/j.msea.2017.01.051

Google Scholar

[7] D. Daniel, R. Shahani, R. Baldo and J. Hoffmann, Develpment of 6xxx alloy aluminium sheet for autobody outer panels:bake hardening, formability and trimming performance, SAE Techn. Paper 1999-01-3195 (1999).

DOI: 10.4271/1999-01-3195

Google Scholar