Effect of Equal Channel Angular Extrusion on the Microstructures and Properties of Two Extruded Al-Mg-Si Alloys

J Mater Sci Technol ›› 2005, Vol. 21 ›› Issue (05): 623-629.

• Research Articles • Previous Articles Next Articles

Effect of Equal Channel Angular Extrusion on the Microstructures and Properties of Two Extruded Al-Mg-Si Alloys

M.Cai, G.W.Lorimer

School of Materials, The University of Manchester, Grosvenor Street, M1 7HS, Manchester, UK

Received:2005-06-20 Revised:1900-01-01 Online:2005-09-28 Published:2009-10-10
Contact: M.Cai

Abstract

Abstract: The effect of equal channel angular extrusion (ECAE) on the microstructure of two Al-Mg-Si extrusion alloys was investigated by high resolution electron backscattered diffraction (EBSD) using a field emission gun scanning electron microscope (FEG-SEM) and a transmission electron microscope (TEM). Two contrasting alloys: a dilute alloy, based on alloy 6061 and a concentrated alloy, based on alloy 6069 were employed for this research. It has been found that prior ECAE to extrusion promotes high angle grain boundaries (HAGBs) in the extrusions, and the increase in HAGBs ratio is due to the large shear deformation involved in the process of ECAE. Tensile testing results show that a further ageing treatment strengthens the alloys after extrusion and the ECAE processed extrusions are more ductile than conventional extrusions.

Key words: Equal channel angular extrusion, Electron backscattered diffraction, Al-Mg-Si alloys

M.Cai, G.W.Lorimer. Effect of Equal Channel Angular Extrusion on the Microstructures and Properties of Two Extruded Al-Mg-Si Alloys[J]. J Mater Sci Technol, 2005, 21(05): 623-629.

References

[1]N.C.Parson and H.L.Yiu:Light Alloys,1989,713.
[2]H.J.McQueen and O.C.Celliers:Canadian Metal,(Quar-terly),1997,36(2),73.
[3]J.E.Hatch:Aluminium,Properties and Physical Metal-lurgy,ASM,1984.
[4]W.G.Barry:Proc.of the3rd International Aluminium Extrusion Technology Seminar,Aluminum Association,1984,7.
[5]L.Gullman,S.Zajac and A.Johanson:Proc.of the5th International Aluminium Extrusion Technology Seminar,Aluminum Association,1992,71.
[6]D.W.Evans and J.Aucote:Proc.of the3rd Interna-tional Aluminium Extrusion Technology Seminar,Alu-minum Association,1984,53.
[7]A.Jackson and T.Sheppard:Mater.Sci.Tech.,1997,13,61.
[8]O.Reiso:Proc.of the3rd International Aluminium Extrusion Technology Seminar,Aluminum Association,1984,31.
[9]O.Reiso,U.Tundal and S.J.Andersen:Proc.of the6th International Aluminium Extrusion Technology Seminar,Aluminum Association,1996,141.
[10]M.Gavgali and B.Aksakal:Mater.Sci.Eng.,1998,A254,189.
[11]R.A.Ricks,N.C.Parson,H.L.Yiu and S.A.Court:Proc.of the5th International Aluminium Extrusion Technology Seminar,Aluminum Association,1992,57.
[12]S.Zajac,B.Bengtsson,A.Johansson and L.Gullman:Mater.Sci.Forum,1996,217-222,397.
[13]S.Sutiarso:Ph.D.Thesis,The University of Manchester,2003.
[14]F.J.Humphreys:J.Microscopy,1999,195,170.
[15]P.J.Hurly and F.J.Humphreys:J.Microscopy,2002,205(3),218.
[16]P.J.Hurly and F.J.Humphreys:Acta Mater.,2003,51(4),1087.
[17]S.Ferrasse,V.M.Segal,K.T.Hartwig and R.E.Goforth:Metall.Mater.Trans.,1997,28A,1047.
[18]K.Nakashima,Z.Horita,M.Nemoto and T.G.Langdon:Acta Mater.,1998,46(5),1589.
[19]C.Harris,P.B.Prangnell and X.Duan:Proc.of the6th In-ter.Conf.on Aluminium Alloys,Toyohashi,Japan,eds.T.Sato et al.,Japan Institute of Light Metals,1,1998,583.
[20]Y.Iwahashi,Z.Horita,M.Nemoto and T.G.Langdon:Acta Mater,1998,46(9),3317.
[21]Z.Horita,T.Fujinami,M.Nemoto and T.G.Langdon:Proc.of the6th Int.Conf.on Aluminium Alloys,Toy-ohashi,Japan,eds.T.Sato et al.,Japan Institute of Light Metals,1,1998,449.
[22]S.Lee,P.B.Berbon,M.Furukawa,Z.Horita,M.Nemoto,K.Tsenev,R.Z.Valiev and T.G.Langdon:Mater.Sci.Eng.,1999,A272,63.
[23]J.Bowen,P.B.Prangnell and F.J.Humphreys:Proc.of tie20th Riscj>International Symposium on Materials Science,eds.J.B.Bilde-S^rensen,et al.,Ris<￡National Laboratory,Roskilde,Denmark,1999,269.
[24]D.H.Shin,B.C.Kim,Y.Kim and K.Park:Acta Mater,2000,48,2247.
[25]Y.Fukuda,K.Oh-ishi,Z.Horita and T.G.Langdon:Acta Mater,2002,501359.
[26]M.Cai,J.Robson,G.W.Lorimer and N.C.Parson:Mater.Sci.Forum,2002,396-492,201.
[27]F.J.Humphreys and M.Hatherly:Recrystallization and Related Annealing Phenomena,Pergamon,1995.
[28]R.W.Hertzberg:Deformation and Fracture Mechanics of Engineering Materials,4th Edition,John Willey&Sons,Inc,1996.<

Effect of Equal Channel Angular Extrusion on the Microstructures and Properties of Two Extruded Al-Mg-Si Alloys

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 7

Recommended Articles

Metrics

Comments

[1]	Y.X. Lai, W. Fan, M.J. Yin, C.L. Wu, J.H. Chen. Structures and formation mechanisms of dislocation-induced precipitates in relation to the age-hardening responses of Al-Mg-Si alloys [J]. J. Mater. Sci. Technol., 2020, 41(0): 127-138.
[2]	Daudi Waryoba, Zahabul Islam, Baoming Wang, Aman Haque. Low temperature annealing of metals with electrical wind force effects [J]. J. Mater. Sci. Technol., 2019, 35(4): 465-472.
[3]	Jing Han, Hongtao Chen, Mingyu Li, Chunqing Wang. Shear Deformation Behaviors of Sn3.5Ag Lead-free Solder Samples [J]. J. Mater. Sci. Technol., 2013, 29(5): 471-479.
[4]	Kai Zhu, Zhenguo Yang. Effect of Mg Addition on the Ferrite Grain Boundaries Misorientation in HAZ of Low Carbon Steels [J]. J Mater Sci Technol, 2011, 27(3): 252-256.
[5]	Fayun Lu, Ping Yang, Li Meng, Fenge Cui, Hua Ding. Influences of Thermal Martensites and Grain Orientations on Strain-induced Martensites in High Manganese TRIP/TWIP Steels [J]. J Mater Sci Technol, 2011, 27(3): 257-265.
[6]	Kinga Rodak, Jacek Pawlicki. Effect of Compression with Oscillatory Torsion Processing on Structure and Properties of Cu [J]. J Mater Sci Technol, 2011, 27(11): 1083-1088.
[7]	Shengquan CAO, Jinxu ZHANG, Jiansheng WU, Jiaguang CHEN. Analysis of Orange Peel Defect in St14 Steel Sheet by Electron Backscattered Diffraction (EBSD) [J]. J Mater Sci Technol, 2005, 21(01): 17-20.