CORRELATION BETWEEN MECHANICAL PROPERTIES OF SELECTED 7XXX SERIES ALUMINUM ALLOYS OBTAINED BY SEMI-CONTINUOUS CASTING
DOI:
https://doi.org/10.7494/mafe.2016.42.1.69Keywords:
Al-Zn-Mg-Cu alloys, DC casting, quality of ingots, mechanical propertiesAbstract
The studied ingots were made of alloys with a similar zirconium ratio, typically be given as: EN AW-7010 [AlZn6MgCu] and EN AW-7003 [Al Zn6Mg0,8Zr], in accordance with European standard PN-EN 573-3:2014-02 English version. The symbols S and K are our internal modifications, compatible with the standard. The added zirconium was intended to improve the tensile strength resulting from plastic forming and an increasing resistance to cracking. Samples were taken from ingots made in the process of semi-continuous casting, some of which were homogenized; however, non-homogenized samples were also analyzed. The tests of tensile strength for the 7003, 7003S, and 7010K alloys were conducted longitudinally and transversely to the casting direction.The tensile strength test for 7010 was conducted only transversely to the direction of casting. The aim of this publication is to present the results of strength test sand to show a correlation between the basic properties of 7xxx-series aluminum alloys; i.e., relative elongation E, yield strength YS, and ultimate tensile strength UTS.Downloads
References
Lityńska-Dobrzyńska L., Dutkiewicz J., Maziarz W., Góral A.: Microstructure of Rapidly Solidified Al-12Zn-3Mg-1.5Cu Alloy with Zr and Sc Additions. Materials Transactions, 52, 3 (2011), 309–314
Kwak Z., Rzadkosz S., Garbacz-Klempka A., Krok W.: Wpływ dodatków stopowych na mikrostrukturę i właściwości stopów serii 7xxx. Archives of Foundry Engineering, 4 (2014), 83–88
Kwak Z., Rzadkosz S., Garbacz-Klempka A., Perek-Nowak M., Krok W.: The properties of 7xxx series alloys formed by alloying additions. Archives of Foundry Engineering, 2 (2015), 59–64
Haider T. Naeem, Kahtan S. Mohammed: Microstructural Evaluation and Mechanical Properties of an Al-Zn-Mg-Cu-Alloy after Addition of Nickel under RRA Conditions. Materials Sciences and Applications, 4 (2013), 704–711
https://www.smithmetal.com/7010.htm [access: 31.05.2016]
http://www.hydro.com/en/Press-room/Feature-stories/Aluminium/High-strength-aluminium-for-automotive-applications/ [access: 31.05.2016]
Reza Eivani A., Zhou J., Duszczyk J.: Microstructural evolution during the homogenization of Al-Zn-Mg aluminium alloys. In: InTech, Chapters published November 21, 2011 under CC BY 3.0 license, 2011, 477–516. Available from: http://www.intechopen.com/books/recenttrends-in-processing-and-degradation-of-aluminium-alloys/microstructural-evolution-during-thehomogenization-of-al-zn-mg-aluminum-alloys [access: 26.03.2016]
Suenger S., Kreissle M., Kahnert M., Zaeh M.F.: Influence of Process Temperature on Hardness of Friction Stir Welded High Strength Aluminum Alloys for Aerospace Applications. Procedia CIRP, 24 (2014), 120–124
Grandfield J.F., McGlade P.T.: DC casting of aluminium: process behaviour and technology. Materials Forum-Rushcutters Bay, 20 (1996), 29–51
Chemical composition according to standard PN-EN 573-3:2014-02 English version, Aluminium i stopy aluminium – Skład chemiczny i rodzaje wyrobów przerobionych plastycznie [Aluminum and Aluminum Alloys – Chemical composition and the type of products obtained by metal-working processes]
Kwak Z., Garbacz-Klempka A., Perek-Nowak M.: Microstructure of selected 7xxx series aluminum alloys obtained by semi-continuous casting. Prace Instytutu Odlewnictwa, 56, 3 (2016), 221–232
