Tensile Strength and Impact Toughness of an AA 7075-T6 Alloy: Effects of Aging Temperature and Time During Retrogression Treatment

Ahmet Karaaslan; Isik Kaya; Hakan Atapek

doi:10.3139/120.100882

Article

Tensile Strength and Impact Toughness of an AA 7075-T6 Alloy

Effects of Aging Temperature and Time During Retrogression Treatment

Ahmet Karaaslan , Isik Kaya and Hakan Atapek

Published/Copyright: May 28, 2013

Published by

Become an author with De Gruyter Brill

Submit Manuscript Author Information

From the journal Materials Testing Volume 50 Issue 5

Abstract

In this study retrogression and aging treatment have been applied to the samples of an aluminum alloy AA 7075-T6. The retrogression treatment has been performed with different temperatures and times and then aging treatment has been applied at 130°C for 12 h. By determining the effects of the retrogression treatment temperatures and times on the samples, the microstructral and also mechanical changes in AA 7075-T6 alloy have been examined. All microstructures have been investigated by Scanning Electron Microscopy (SEM). Additionally, the mechanical properties have been determined by the notched impact test and the tensile test.

Kurzfassung

Für die dem vorliegenden Beitrag zugrundeliegende Studie wurden eine Retrogressions- und Alterungsbehandlung mit der Aluminiumlegierung AA 7075-T6 durchgeführt. Für die Retrogressionsbehandlung wurden die Temperaturen und Zeiten variiert und dann die Alterung bei 130°C über 12 Std. durchgeführt. Um die Auswirkungen der Retrogressionstemperaturen und -zeiten zu ermitteln, wurden die Veränderungen der Mikrostruktur mittels Rasterelektronenmikroskopie und der mechanischen Eigenschaften mittels Kerbschlagbiegeversuch und Zugversuch untersucht.

Dipl.-Ing. Dr. mont. Ahmet Karaaslan, born 1968, studied Metallurgy and Materials Engineering at the Technical University Yildiz in Istanbul, Turkey, and achieved his PhD in 1999 at the Instiute for Metals Science and Materials Testing at the Montanuniversity Leoben, Austria. Since 1999 he is in the section Materials Engineering at the Technical University Yildiz, Turkey.

Dipl.-Ing. Isik Kaya, born in Istanbul, graduated from the Yildiz Technical University (YTU), Department of Metallurgical Engineering in 2002. She had her M.Sc. degrees from YTU, Department of Metallurgical and Materials Engineering in 2005. She has been working in Sistem Alüminyum since 2004.

Dipl.-Ing. Hakan Atapek, born in Adana, graduated from the Kocaeli University Izmit, Department of Metallurgical and Materials Engineering in 2003. He had his M.Sc. degree from the Kocaeli University Izmit in the sam Department. He has been working in Kocaeli University Izmit Dept. of Metallurgical and Materials Engineering since 2003.

References

1 N. QChinh, J.Lendvai, D. H.Ping, K.Hono: The effect of Cu on the mechanical properties of Al- Zn- Mg Alloys, Journal of Alloys and Compounds378 (2004), pp. 52–60.10.1016/j.jallcom.2003.11.175Search in Google Scholar

2 A.Deschamps, M.Niewczas, F.Bley, Y.Brechet, J. D.Embury, L. L.Sinq, F.Livet, J. P.Simon: Low temperature dynamic precipitation in a supersaturated Al-Zn-Mg alloy and related strain hardening, Phil. Mag. A79 (1999), No. 10, pp. 2485–250410.1080/01418619908214295Search in Google Scholar

3 L.Dong-Woo, L.Sang-Yong, L.Kyong-Hwan, L.Su-Keun, O.Kyu-Hwan: Microstructure evolution of a Al-Zn-Cu-Sc alloy during hot extrusion and heat treatment, Journal of Materials Processing Technology, 155 and156 (2004), pp. 1330–1336Search in Google Scholar

4 D.Dumont, A.Deschamps, Y.Brechet: On the relationship between microstructive strength and toughness in a AA 7050 Aluminum alloy, Materials Science and Engineering, A356 (2003), pp. 326–336Search in Google Scholar

5 R.Ferragut, A.Somoza, A.Tolley, I.Torriani: Precipitation kinetics in Al-Zn-Mg commericial alloys, Journal of Materials Processing Technology141 (2003), pp. 35–4010.1016/S0924-0136(02)01044-0Search in Google Scholar

6 A.Fjeldly, A.Sqreng, H. J.Roven: Strain localisation in solution heat treated Al-Zn-Mg alloys, Materials Science and Engineering, A300 (2001), pp. 165–170Search in Google Scholar

7 R. J.Flynn, J. S.Robinson: The application of advances in quench factor property prediction to the heat treatment of 7010 Aluminum alloy, Journal of Materials Technology, 153 and154 (2004), pp. 674–680Search in Google Scholar

8 L.Sang-Yong, L.Jung-Hwan, L.Young-Seon: Characterization of Al 7075 alloys after cold working and heat heating in the semi-solid temperature range, Material Processing Technology, 111 (2001), pp. 42–4710.1016/S0924-0136(01)00494-0Search in Google Scholar

Published Online: 2013-05-28

Published in Print: 2008-05-01

You are currently not able to access this content.

Articles in the same Issue

https://doi.org/10.3139/120.100882