Microstructures and Properties of Aluminum Alloys during Repetitive Continuous Extrusion Forming

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Abstract:

Repetitive continuous extrusion forming was employed as a continuous severe plastic deformation route and both Al-Fe-Cu alloy and Al-Mg-Si alloy were involved. Evolution of microstructures and properties during this process is investigated by optical microscope, electron-backscatter diffraction, transmission electron microscope, and tensile testing. The results show that in the Al-Fe-Cu alloy an obvious mechanical softening and grain refinement were observed, while in the Al-Mg-Si alloy it shows a slightly rising in strength and ductility as the extrusion passes increasing.

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2261-2267

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November 2016

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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[1] Shaeri MH, Salehi MT, Seyyedein SH, Abutalebi MR, Park JK. Microstructure and mechanical properties of Al-7075 alloy processed by equal channel angular pressing combined with aging treatment. Materials & Design. 2014; 57: 250-7.

DOI: 10.1016/j.matdes.2014.01.008

Google Scholar

[2] Valiev RZ, Langdon TG. Principles of equal-channel angular pressing as a processing tool for grain refinement. Progress in Materials Science. 2006; 51: 881-981.

DOI: 10.1016/j.pmatsci.2006.02.003

Google Scholar

[3] Zhilyaev A, Langdon T. Using high-pressure torsion for metal processing: Fundamentals and applications. Progress in Materials Science. 2008; 53: 893-979.

DOI: 10.1016/j.pmatsci.2008.03.002

Google Scholar

[4] Rao PN, Singh D, Jayaganthan R. Mechanical properties and microstructural evolution of Al 6061 alloy processed by multidirectional forging at liquid nitrogen temperature. Materials & Design. 2014; 56: 97-104.

DOI: 10.1016/j.matdes.2013.10.045

Google Scholar

[5] Rezaee-Bazzaz A, Ahmadian S, Reihani H. Modeling of microstructure and mechanical behavior of ultra fine grained aluminum produced by accumulative roll-bonding. Materials & Design. 2011; 32: 4580-5.

DOI: 10.1016/j.matdes.2011.04.011

Google Scholar

[6] Huang J, Zhu Y, Jiang H, Lowe T. Microstructures and dislocation configurations in nanostructured Cu processed by repetitive corrugation and straightening. Acta Materialia. 2001; 49: 1497-505.

DOI: 10.1016/s1359-6454(01)00069-6

Google Scholar

[7] Utsunomiya H, Hatsuda K, Sakai T, Saito Y. Continuous grain refinement of aluminum strip by conshearing. Materials Science and Engineering: A. 2004; 372: 199-206.

DOI: 10.1016/j.msea.2003.12.014

Google Scholar

[8] Raab GJ, Valiev RZ, Lowe TC, Zhu YT. Continuous processing of ultrafine grained Al by ECAP–Conform. Materials Science and Engineering: A. 2004; 382: 30-4.

DOI: 10.1016/j.msea.2004.04.021

Google Scholar

[9] Xu C, Schroeder S, Berbon PB, Langdon TG. Principles of ECAP–Conform as a continuous process for achieving grain refinement: Application to an aluminum alloy. Acta Materialia. 2010; 58: 1379-86.

DOI: 10.1016/j.actamat.2009.10.044

Google Scholar

[10] Kong X, Zhang H, Ji X. Microstructures and mechanical properties evolution of an Al–Fe–Cu alloy processed by repetitive continuous extrusion forming. Materials Science and Engineering: A. 2014; 612: 131-9.

DOI: 10.1016/j.msea.2014.06.038

Google Scholar

[11] Kim H-W, Kang S-B, Tsuji N, Minamino Y. Elongation increase in ultra-fine grained Al–Fe–Si alloy sheets. Acta Materialia. 2005; 53: 1737-49.

DOI: 10.1016/j.actamat.2004.12.022

Google Scholar

[12] Edalati K, Horita Z, Furuta T, Kuramoto S. Dynamic recrystallization and recovery during high-pressure torsion: Experimental evidence by torque measurement using ring specimens. Materials Science and Engineering: A. 2013; 559: 506-9.

DOI: 10.1016/j.msea.2012.08.132

Google Scholar

[13] Li B, Pan Q, Yin Z. Microstructural evolution and constitutive relationship of Al–Zn–Mg alloy containing small amount of Sc and Zr during hot deformation based on Arrhenius-type and artificial neural network models. Journal of Alloys and Compounds. 2014; 584: 406-16.

DOI: 10.1016/j.jallcom.2013.09.036

Google Scholar

[14] Sakai T, Belyakov A, Kaibyshev R, Miura H, Jonas JJ. Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions. Progress in Materials Science. 2014; 60: 130-207.

DOI: 10.1016/j.pmatsci.2013.09.002

Google Scholar

[15] Zhu Z, Starink M. Solution strengthening and age hardening capability of Al–Mg–Mn alloys with small additions of Cu. Materials Science and Engineering: A. 2008; 488: 125-33.

DOI: 10.1016/j.msea.2007.12.018

Google Scholar