Effect of Pre-Deformation Degree on the Mechanical Properties and Microstructural Evolution of a Novel Al-Cu-Li Alloy

Abstract:

Pre-deformation is usually indispensable to obtain an appropriate balance between microstructure and mechanical properties of Al-Cu-Li alloys. In this paper, the effect of pre-deformation degree on the evolution of strength, fracture toughness, and precipitates during artificial aging processes of a novel Al-Cu-Li alloy was studied. The results indicated that the amount of T₁ phase increased remarkably while the precipitation of θ' phase was inhibited with the increase of pre-deformation degree. The change in the average size of T₁ phase indicated that the increase in nucleation sites suppressed the full growth of T₁ phases. The fracture toughness could be related to the strength difference between intragranular and intergranular. Based on the matching of properties, a reasonable pre-deformation parameter was proposed.

• Periodical: Key Engineering Materials (Volume 921)
• Pages: 93-99
• DOI: https://doi.org/10.4028/p-7eq383
• Online since: May 2022
• Authors: Peng Cheng Chen*, Xi Wu Li, Yong Yao, Wen You
• Keywords: Al-Cu-Li Alloy, Precipitates, Pre-Deformation, Properties

References

[1] T. Dursun, C. Soutis, Recent developments in advanced aircraft Aluminium alloys, Mater. Des. 56 (2014) 862-871.

DOI: 10.1016/j.matdes.2013.12.002

[2] R.J. Rioja, J. Liu, The evolution of Al-Li base products for aerospace and space applications, Metall. Mater. Trans. A. 43 (2012) 3325-3337.

DOI: 10.1007/s11661-012-1155-z

[3] E.J. Lavernia, T.S. Srivatsan and F.A. Mohamed, Strength, deformation, fracture behaviour and ductility of Aluminium-Lithium alloys, J. Mater. Sci. 25 (1990) 1137-1158.

DOI: 10.1007/bf00585420

[4] N.E. Prasad, A. Gokhale and R.J.H. Wanhill, Aluminum-Lithium alloys: processing, properties, and applications, Elsevier Ltd, Oxford, (2013).

[5] W.A. Cassada, G.J. Shiflet, E.A. Starke, The effect of plastic deformation on Al2CuLi (T1) precipitation, Metall. Mater. Trans. A, 22 (1991) 299-306.

DOI: 10.1007/bf02656799

[6] S.P. Ringer, B.C. Muddle, I.J. Polmear, Effects of cold work on precipitation in Al-Cu-Mg-(Ag) and Al-Cu-Li-(Mg-Ag) alloys, Metall. Mater. Trans. A, 26 (1995) 1659-1671.

DOI: 10.1007/bf02670753

[7] B.M. Gable, A.W. Zhu, A.A. Csontos, et al, The role of plastic deformation on the competitive microstructural evolution and mechanical properties of a novel Al-Li-Cu-X alloy, J. Light Met. 1 (2001) 1-14.

DOI: 10.1016/s1471-5317(00)00002-x

[8] D. Tsivoulas, P. Prangnell, Comparison of the effect of individual and combined Zr and Mn additions on the fracture behavior of Al-Cu-Li alloy AA2198 rolled sheet, Metall. Mater. Trans. A, 45 (2014) 1338-1351.

DOI: 10.1007/s11661-013-2103-2

[9] G. Itoh, Q. Cui and M. Kanno, Effects of a small addition of Mg and Ag on the precipitation of T1 phases in an Al-4%Cu-1.1%Li-0.2%Zr alloy, Mater. Sci. Eng. A, 211 (1996) 128-137.

DOI: 10.1016/0921-5093(95)10157-8

[10] V. Araullo-Peters, B. Gault, F. De Geuser, et al, Microstructural evolution during ageing of Al-Cu-Li-X alloys, Acta Mater. 66 (2014) 199-208.

DOI: 10.1016/j.actamat.2013.12.001

[11] B.I. Rodgers, P.B. Prangnell, Quantification of the influence of increased pre-stretching on microstructure-strength relationships in the Al-Cu-Li alloy AA2195, Acta Mater. 108 (2016) 55-67.

DOI: 10.1016/j.actamat.2016.02.017

[12] J. Zhang, Z. Li, F. Xu, et al, Regulating effect of pre-stretching degree on the creep aging process of Al-Cu-Li alloy, Mater. Sci. Eng. A, 763 (2019) 138157.

DOI: 10.1016/j.msea.2019.138157

[13] E. Gumbmann, W. Lefebvre, F. De Geuser, et al, The effect of minor solute additions on the precipitation path of an Al-Cu-Li alloy, Acta Mater. 115 (2016) 104-114.

DOI: 10.1016/j.actamat.2016.05.050

[14] F. Dong, S. Huang, Y. Yi, et al, Effect of increased stretching deformation at cryogenic temperature on the precipitation behavior and mechanical properties of 2060 Al-Li alloy, Mater. Sci. Eng. A, 834 (2022) 142585.

DOI: 10.1016/j.msea.2021.142585

[15] S. Duan, F. Guo, D. Wu, et al, Influences of pre-rolling deformation on aging precipitates and mechanical properties for a novel Al–Cu–Li alloy, J. Mater. Res. Technol. 15 (2021) 2379-2392.

DOI: 10.1016/j.jmrt.2021.09.063

[16] Y. Deng, G. Huang, L. Cao, et al, Effect of pre-deformation on the precipitation behavior and mechanical property of Al-Cu-Li-Mn-Zr alloy, Mater. Rep. 32 (2018) 569-573.

[17] E. Hornbogen, Formation of nm-size dispersoids from supersaturated solid solutions of Aluminium, Mater. Sci. Forum, 331-337 (2000) 879-888.

DOI: 10.4028/www.scientific.net/msf.331-337.879

[18] D.Y. Li, L.Q. Chen, Computer simulation of stress-oriented nucleation and growth of θ' precipitates in Al-Cu alloys, Acta Mater. 46 (1998) 2573-2585.

DOI: 10.1016/s1359-6454(97)00478-3

[19] J.C. Huang, A.J. Ardell, Strengthening mechanisms associated with T1 particles in two Al-Li-Cu alloys, J. Phys. Colloques, 48 (1987) C3-373-C3-383.

DOI: 10.1051/jphyscol:1987343