Property Requirements and Research Progress of Aluminum Alloy Sheets for Automotive Closure

Abstract:

Based on the requirements of automotive closure for production process and service performance, the property requirements of aluminum alloy sheet for automotive closure, including aging resistance stability, formability, bake hardening, dent resistance, flanging ductility, painting compatibility, etc., as well as introduced their test methods, evaluation characterization parameters, and the pre-aging process were discussed in this paper. Specially, the influential factors and control methods of spring-back of aluminum alloy sheet was discussed. The effect of the pre-aging process on the aging resistance stability and bake hardening of the aluminum alloy sheet for automotive was analyzed, and the property evolution of aluminum alloy sheet under industrial pre-aging process studied. The orange peel and roping phenomena of Al-Mg-Si alloy sheet after deformation were summarized as well.

• Periodical: Materials Science Forum (Volume 913)
• Pages: 18-29
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.913.18
• Online since: February 2018
• Authors: Ming Tu Ma*, Jun Ping Zhang, Jia Zhou, Hong Zhou Lu
• Keywords: Aluminum Alloy Sheet, Automotive Closure, Orange Peel, Pre-Aging, Spring-Back

References

[1] S. Toros, F. Ozturk, and I. Kacar. Review of warm forming of aluminum–magnesium alloys[J]. Journal of Materials Processing Technology, 207(1-3) (2008) 1-12.

DOI: 10.1016/j.jmatprotec.2008.03.057

[2] Ma MT, YOU JH, Lu HZ. Lightweight of automotives and the application of aluminum alloy sheets[J]. Advanced Materials Industry, 9 (2009).

[3] Alan A. Luo. Automotive Applications of Aluminum and Magnesium Alloys[R]. China&American Automotive Materials Seminar. Detroit, MI, March 8, (2003).

[4] Europe Car Body Reports, 2007-(2011).

[5] S. Holmberg and P. Thilderkvist. Influence of material properties and stamping conditions on the stiffness and static dent resistance of automotive panels[J]. Materials & Design, 23(8) (2002) 681-691.

DOI: 10.1016/s0261-3069(02)00079-1

[6] GHibsy Seehafer, Daniel Schmid. Audi TT coupe[R]. EuroCarBody 2014, Bad Nauheim.

[7] Marlen Bertram. Improving sustainability in the transport sector-through weight reduction and the application of aluminum[R]. Dalian: International seminar on the car with aluminum, (2007).

[8] Kobe Steel Lt. Automotive sheet and coila[R]. Shanghai, China, (2008).

[9] Aluminum Standard and Data[M]. The Automotive Association Inc. 2003, P5-1~5-16.

[10] BS EN 10325 Steel—Determination of yield strength increased by the effect of heat treatment [S].

[11] SAE-China J3201－2013 Dent resistance test method of automotive panel sheet [S].

[12] Aleris Ltd. Hemming Metallurgical Optimisation[R]. Automotive Lightweight Seminor, Beijng, (2011).

[13] Zhao PZ. The development and application of 5xxx and 6xxx automotive aluminum alloy sheet[R]. 3rd international traffic aluminum conferences, (2011).

[14] P.A. Friedman and S.G. Luckey. Failure of Al-Mg-Si Alloys in Bending. Practical Failure Analysis. ASM International, 2(1) (2002) 33-42.

DOI: 10.1007/bf02715390

[15] Zehua Qin, P.K. MAllick. A study on the bending springback of aluminum alloy 5754[J]. SAE 01 (2003) 95-100.

DOI: 10.4271/2003-01-0576

[16] Chen JH, Costan E, Huis MAv, et al. Atomic Pillar–Based Nanoprecipitates Strengthen AlMgSi Alloys[J]. Science. 312 (2006) 416-419.

DOI: 10.1126/science.1124199

[17] Ma MT, Mei HS, Lu HZ, et al. Relation between surface orange peel, mechanical properties and surface roughness of tensile aluminum alloy sheet[J]. Materials for mechanical engineering, 37(8) (2013) 59-62.

[18] Ma MT, Yang HY, Wu EM, et al. Progress on the formation reason of aluminum alloy orange peel in the tensile process[J]. China engineering and Science, 16(1) (2014) 4-13.

[19] Y. Shi, H. Jin, P.D. Wu. Analysis of roping in an AA6111 T4P automotive sheet in 3D deformation states[J]. Acta Materialia, 124 (2017) 598-607.

DOI: 10.1016/j.actamat.2016.11.028

[20] Bennett T A, Petrov R H, Kestens LAI. Avoiding roping and ridging in AA6XXX sheets: characterizing the initial state[J]. Applications of Texture Analysis, (2008) 373-380.

DOI: 10.1002/9780470444214.ch39

[21] Xie JF. Study of texture and microstructure of 6016 aluminum alloy sheet[D]. Chongqing University, (2015).