Effect of Severe Plastic Deformation at Ambient Temperature on Microstructures and Mechanical Properties of Aluminum Alloy 2519

Abstract:

The effect of severe plastic deformation at ambient temperature on microstructures and mechanical properties of aluminum alloy 2519 was investigated by means of tensile test, micro-hardness test, optical microscopy and scanning electron microscopy. The results showed that tensile strength of as-queched 2519 alloy was greatly enhanced to nearly 550MPa (ultimate tensile strength, UTS) and 520MPa (yield strength, YS) by severe cold rolling or equal channel angular processing (ECAP) while the elongation decreased to 5%. The 2519 alloy could obtain quite well mechanical properties as much as 80 % and 12 passes cold rolling deformation. This indicated that pre-deformation by ECAP is effective in improving the mechanical properties of 2519 alloy by grain refinement, strain aging and high density dislocations.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 298-302
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.298
• Online since: February 2013
• Authors: Ying Liu, Ruo Lin Cheng, Jing Tao Wang, He Zhang, Xin Ming Zhang
• Keywords: Aluminum Alloy 2519, Equal Channel Angular Processing, Severe Cold Rolling, Shear Band

References

[1] J.F. James, L.S. Kramer and J.R. Pickens, Aluminum alloy 2519 in military vehicles. Advance Materials and Processing. 160(9) (2002) 43-46.

[2] B.C. Hamilton and A. Saxena, Transient crack growth behavior in aluminum alloys C415-T8 and 2519-T87. Engineering Fracture Mechanics. 62 (1) (1999) 1-22.

DOI: 10.1016/s0013-7944(98)00084-8

[3] H.Z. Li, X.M. Zhang and M.A. Chen, Effect of pre-deformation on microstructures and mechanical properties of 2519 aluminum alloy. The Chinese Journal of Nonferrous Metals. 14 (12) (2004) 1990-(1995).

[4] W.T. Wang, et al., Influence of Ce addition on the microstructures and mechanical properties of 2519A aluminum alloy plate. Journal of Alloys and Compounds. 491(2010) 366-371.

DOI: 10.1016/j.jallcom.2009.10.185

[5] L.J. Zheng, et al., Evolution of microstructure and strengthening of 7050 Al alloy by ECAP combined with heat-treatment. Journal of Materials Processing Technology. 171(1) (2006) 100-107.

DOI: 10.1016/j.jmatprotec.2005.06.049

[6] J. Gubicza, et al., The effect of severe plastic deformation on precipitation in supersaturated Al-Zn-Mg alloys. Materials Science and Engineering: A. 460-461(2007) 77-85.

DOI: 10.1016/j.msea.2007.01.001

[7] W. Kim, et al., Enhancement of strength and superplasticity in a 6061 Al alloy processed by equal-channel-angular-pressing. Metallurgical and Materials Transactions A. 33(10) (2002) 3155-3164.

DOI: 10.1007/s11661-002-0301-4

[8] S. Dadbakhsh, T.A. Karimi and C.W. Smith, Strengthening study on 6082 Al alloy after combination of aging treatment and ECAP process. Materials Science and Engineering: A. 527(18-19) (2010) 4758-4766.

DOI: 10.1016/j.msea.2010.04.017

[9] M. Cabibbo, E. Evangelista and M. Vedani, Influence of severe plastic deformations on secondary phase precipitation in a 6082 Al-Mg-Si alloy. Metallurgical and Materials Transactions A. 36(5) (2005) 1353-1364.

DOI: 10.1007/s11661-005-0226-9

[10] P.J. Hurley and F.J. Humphreys, The application of EBSD to the study of substructural development in a cold rolled single-phase aluminium alloy. Acta Materialia. 51(4) (2003) 1087-1102.

DOI: 10.1016/s1359-6454(02)00513-x