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Erschienen in:

2020 | OriginalPaper | Buchkapitel

Retrogression Forming and Reaging of AA7075-T6 Alclad to Produce Stampings with Peak Strength

verfasst von : Katherine E. Rader, Jon T. Carter, Louis G. Hector Jr., Eric M. Taleff

Erschienen in: Light Metals 2020

Verlag: Springer International Publishing

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Abstract

A retrogression heat treatment was combined with simultaneous warm forming to produce cross-shaped stampings from AA7075-T6 Alclad sheet. This process is termed retrogression forming. A maximum-allowed-retrogression-forming-time, which includes sheet heat up, transfer, and stamping, was predicted by calculation to achieve peak-aged strength through a single reaging heat treatment after forming. Sheets of 1.6-mm-thick AA7075-T6 Alclad were stamped at 200 °C to a depth of 45 mm within 2 s without splitting. The formed geometry exhibits a complexity appropriate to automotive structural components. These stampings were then subjected to one of two reaging heat treatments. A full reaging heat treatment of 120 °C for 24 h produced strength levels in excess of the original, peak-aged T6 alloy sheet. A simulated paint bake heat treatment at 185 °C for 25 min recovered 95% of the strength lost during warm forming. Successful retrogression forming and reaging of AA7075-T6 provides new possibilities for stamping high-strength aluminum alloys into complex geometries without sacrificing strength.

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Vorheriges Kapitel Formation of Rare Earth Intermetallics in Al–Cu Cast Alloys

Nächstes Kapitel High Cycle Fatigue Properties of the Zr-Modified Al–Si–Cu–Mg Alloy at Elevated Temperatures

Harrison NR, Luckey SG (2014) Hot stamping of a B-pllar outer from high strength aluminum sheet AA7075. SAE Int. 2014-01-0981.

Mendiguren J, Saenz de Arganodona E, Galdos L (2016) Hot stamping of AA7075 aluminum sheets. IOP Conference Series: Materials Science and Engineering 159:1–5.

Keci A, Harrison NR, Luckey SG (2014) Experimental evaluation of the quench rate of AA7075. SAE Int. 2014-01-0984.

[4] Wang H, Luop YB, Friedman P, Chen MH, Gao L (2012) Warm forming behavior of high strength aluminum alloy AA7075. Trans. Nonferrous Metals Society of China 22(1):1–7.

Zheng K, Politis DJ, Wang L, Lin J (2018) A review on forming techniques for manufacturing lightweight complex-shaped aluminum panel components. Int. J. Lightweight Materials and Manufacture 1(2):55–80.

Long RS, Boettcher E, Crawford D (2017) Current and future uses of aluminum in the automotive industry. JOM 69(12):2635–2639.

ASM Handbook Committee (1990) Properties of wrought aluminum and aluminum alloys. ASM Handbook, Volume 2: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, 62–122.

Philip TV, McCaffrey TJ (ed.s) (1990) Ultrahigh-strength steels. ASM Handbook, Volume 1: Properties and Selection: Irons, Steels, ad High-Performance Alloys, 430–448.

Nieuwerburgh DV (2011) Aluminum sheet developments for current and future BIW concepts. Presented at Aluminum Experience Day, Aleris, Cleveland, Ohio, 30 August 2011.

10.

Reinstettel M (2015) The door sidecrash beam in the new BMW i8: Application of a press hardened 7xxx aluminum alloy panel. Presented at the 5th International Conference on Accuracy in Forming Technology, Auerbach, Germany, 22 April 2015.

11.

Polak S, Kaczyński P, Gronostajski Z, Jaskiewicz K, Krawczyk J, Skwarski M, Zwierzchowski M, Chorzępa W (2017) Warm forming of 7075 aluminum alloys. Procedia Engineering 207:2399–2404.

12.

Ivanoff TA, Carter JT, Hector, Jr. LG, Taleff EM (2018) Retrogression and reaging applied to warm forming of high-strength aluminum alloy AA7075-T6 sheet. Metallurgical and Materials Transactions A 50(3):1545–1561.

13.

Rader KE, Schick MB, Carter JT, Hector, Jr. LG, Taleff EM (2019) Conditions for retrogression forming aluminum AA7075-T6 sheet. Light Metals 2019:186–191.

14.

Cina BM (1973) Reducing the susceptibility of alloys, particularly aluminum alloys, to stress corrosion cracking. US. Patent 3,856,584. 24 December 1974.

15.

Cina BM, Ranish B (1974) New technique for reducing susceptibility to stress-corrosion of high strength aluminum alloys. Aluminum Industrial Products:1–29.

16.

Park JK (1988) Influence of retrogression and reaging treatments on the strength and stress corrosion resistance of alumina alloy 7075-T6. Materials Science and Engineering A 103(2):223–231.

17.

Park JK, Ardell AJ (1984) Effect of retrogression and reaging treatments on the microstructure of Al-7075-T65. Metall. Trans. A 15A:1531–1543.

18.

Kannan MB, Srinivasan PB, Raja VS (2011) Stress corrosion cracking (SCC) of aluminum alloys. Stress Corrosion Cracking; Woodhead Publishing, 307–340.

19.

Immarigeon JP, Holt RT, Koul AK, Zhao L, Wallace W, Beddos JC (1995) Lightweight materials for aircraft applications. Materials Characterization 35:41–67.

20.

Rader KE, Ivanoff TA, Shin H, Carter JT, Hector, Jr. LG, Taleff EM (2018) Determining a retrogression heat treatment to apply during warm forming of a high strength aluminum AA7075 sheet material. Light Metals 2018:241–246.

21.

Kim H, Hahnlen R, Feister T, & Tungad V (2018) Comparison of drawability between warm forming and cold forming of aluminum 6xxx alloys. IOP Conference Series: Materials Science and Engineering 418:1–8.

22.

Kim H, Cronley L, Reichert C, Zelenak P (2017) Development of the aluminum warm forming test cell and process solutions. Presented at the International Automotive Body Congress, Dearborn, Michigan, 20–21 September 2017.

23.

Zhuang L, De Haan R, Bottema J, Lahaye CTW, De Smet P (2000) Improvement in bake hardening response of Al-Si-Mg alloys. Materials Science Forum 331–337:1309-1314.

24.

ASTM International (2016) ASTM E8/E8 M-16a Standard Test Methods for Tension Testing of Metallic Materials. Retrieved from https://doi.org/10.1520/E0008_E0008M-16A.

25.

Wu W, Wang YW, Makrygiannisa P, Zhu F, Thomas GA, Hector, Jr. LG, Hu X, Sun X, Ren Y (2017) Deformation Mode and Strain Path Dependence of Martensite Phase Transformation in a Medium Manganese TRIP Steel. Materials Science and Engineering A 711:611–623.

Titel: Retrogression Forming and Reaging of AA7075-T6 Alclad to Produce Stampings with Peak Strength
verfasst von: Katherine E. Rader
Jon T. Carter
Louis G. Hector Jr.
Eric M. Taleff
Verlag: Springer International Publishing
Buch: Light Metals 2020
Print ISBN: 978-3-030-36407-6

Electronic ISBN: 978-3-030-36408-3

Copyright-Jahr: 2020
DOI: https://doi.org/10.1007/978-3-030-36408-3_35

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