Effects of Mn and Zr Addition in 6000 Series Aluminum Alloys on the Formation of Stabilized Substructures during Hot Deformation

Abstract:

Thermal stability of substructures in 6000 series aluminum alloys containing Mn and Zr elements was investigated using plane-strain compression test. In order to form thermally stabilized substructures, the deformation parameters should be selected so as to correlate with kinetic precipitation during the deformation. For substructures of the alloys containing Mn and Zr elements, the substructures were stable during the heat treatment at 540 ̊C when the alloys were deformed at a temperature above 350 ̊C. The sheets rolled above 350 ̊C at a strain rate of under 3 s^-1 per pass showed the fibrous structure and well developed β-fiber textures after the heat treatment at 540 ̊C. The sheets with the fibrous structure had an average Lankford value larger than one.

• Periodical: Materials Science Forum (Volume 877)
• Pages: 281-289
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.877.281
• Online since: November 2016
• Authors: Hiroki Tanaka*, Yasunori Nagai
• Keywords: 6000 Series Aluminium Alloy, Fibrous Structure, Lankford Value, Plain Strain Compression, Thermal Stability

References

[1] T.H. Courtney, Mechanical Behavior of Materials, McGraw-Hill. (1990) 309.

[2] T. Minoda and H. Yoshida, The influence of ingot homogenization on the microstructure of 3003 aluminum alloy extrusion, Journal of Japan Institute of Light Metals. 47(1997) 691-695.

DOI: 10.2464/jilm.47.691

[3] Z. Horita, T. Fujinami, M. Emoto and T.G. Langdon, Equal-channel angular pressing of commercial aluminum alloys: Grain refinement, thermal stability and tensile properties, Metall. Mater. Trans. 31A (2000) 691-701.

DOI: 10.1007/s11661-000-0011-8

[4] ASM Handbook, Metalworking Bulk Forming, A, ASM. 14 (2003) 587.

[5] K.F. Karhausen, J. Savoie, C.M. Allen, D. Piot and R. Luce, Material testing, constitutive modeling and implementation of material models into hot rolling models for alloy AA3103. Materials Science Forum 396-402 (2002) 371-378.

DOI: 10.4028/www.scientific.net/msf.396-402.371

[6] T. Inoue, S. Torizuka and K. Nagai, Numerical analysis of plastic strain distribution through multi-directional deformation. Journal of The Iron and Steel Institute of Japan, 86 (2000) 793-800.

DOI: 10.2355/tetsutohagane1955.86.12_793

[7] H.D. Merchant, J. Crane and E.H. Chia, Homogenization and Annealing of Aluminum and Copper Alloys, The Metallurgical Society Inc. (1988).

[8] J. Weertman and J.R. Weertman, Elementary Dislocation Theory, The Macmillan Company, (1964).

[9] V.B. Ginzburg, Steel-Rolling Technology, Marcel Dekker Inc. (1989)21.

[10] T. Sheppard, Extrusion of Aluminium Alloys, Kluwer Academic Publishers. (1999).

[11] H. Tanaka, Y. Nagai, Y. Oguri and H. Yoshida, Mechanical properties of 5083 aluminum alloy sheets produced by isothermal rolling, Materials Transactions. 48 (2007) 2008-(2013).

DOI: 10.2320/matertrans.l-mra2007872

[12] The Iron and Steel Institute of Japan: Rolling theory and its applications, Seibundo-shinkou sha, (1969).

[13] F.J. Humphreys and M. Hatherly, Recrystallization and related annealing phenomena. 2nd ed.: Elsevier, (2004).