Skip to main content Accessibility help
×
Home

Effect of solution treatment on microstructure and mechanical properties of cast Al–3Li–1.5Cu–0.2Zr alloy

  • Yu Peng (a1), Antao Chen (a1), Liang Zhang (a1), Wencai Liu (a1) and Guohua Wu (a1)...

Abstract

The effect of solution treatment (ST) on the microstructure and mechanical properties of cast Al–3Li–1.5Cu–0.2Zr alloy was investigated. Results showed that the volume fraction of secondary phases (Al2Cu, Al3Li) decreased obviously after ST. It was found that the strengthening of Al–3Li–1.5Cu–0.2Zr alloy was a balance of the precipitation strengthening, residual phase strengthening and fine grain strengthening. The residual phase strengthening and fine grain strengthening decreased with increasing the solution temperature and time, while precipitation strengthening increased. After ST at 560 °C for 40 h, the elongation of Al–3Li–1.5Cu–0.2Zr alloy reaches the highest value of 22.1%. In addition, the tensile properties are up to the highest values, ultimate tensile strength of 359 MPa and elongation of 3.5% after optimal ST at 560 °C for 40 h followed by aging treatment.

Copyright

Corresponding author

a) Address all correspondence to this author. e-mail: liangzhang08@sjtu.edu.cn

References

Hide All
1. Tolga, D. and Soutis, C.: Recent developments in advanced aircraft aluminium alloys. Mater. Des. 56, 862871 (2014).
2. Rajendrana, V., Kumarana, S.M., Jayakumarb, T., Palanichamyb, P., Shankarb, P., and Rajb, B.: Microstructure and ultrasonic behaviour on thermal heat-treated Al–Li 8090 alloy. J. Alloys Compd. 478, 147153 (2009).
3. Gomiero, P., Brechet, Y., and Louchet, F.: Microstructure and mechanical properties of a 2091 Al Li alloy—II. Mechanical properties: Yield stress and work hardening. Acta Mater. 40.4, 857861 (1992).
4. Zhang, S.F., Zeng, W.D., Yang, W.H., Shi, C.L., and Wang, H.J.: Ageing response of a Al–Cu–Li 2198 alloy. Mater. Des. 63, 368374 (2014).
5. Shen, B., Deng, L., and Wang, X.: A new dynamic recrystallisation model of an extruded Al–Cu–Li alloy during high-temperature deformation. Mater. Sci. Eng., A 625, 288295 (2015).
6. Tsivoulas, D. and Prangnell, P.B.: The effect of Mn and Zr dispersoid-forming additions on recrystallization resistance in Al–Cu–Li AA2198 sheet. Acta Mater. 77, 116 (2014).
7. Li, H.Y., Kang, W., and Lu, X.C.: Effect of age-forming on microstructure, mechanical and corrosion properties of a novel Al–Li alloy. J. Alloys Compd. 640, 210218 (2015).
8. Zhang, X., Yang, W., and Xiao, R.: Microstructure and mechanical properties of laser beam welded Al–Li alloy 2060 with Al–Mg filler wire. Mater. Des. 88, 446450 (2015).
9. Drits, M.E., Kadaner, E.S., Turkina, N.I., and Fedotov, S.G.: The mechanical properties of aluminum–lithium alloy [English translation]. Splavy Tsvetn. Met. 14 (1972).
10. Wang, C., Min, G., Lu, Q., and Lu, Z.: Solidification structure and mechanical properties of Al–Li–Cu–Zr cast alloys. Int. J. Cast Met. Res. 17.5, 264266 (2004).
11. Nikitin, S.L., Osintsev, O.E., and Betsofen, S.Y.: Effect of heat treatment conditions on the structure and mechanical properties of a cast Al–Li–Cu aluminum alloy. Russ. Metall. 11, 10411045 (2010).
12. Mrówka-Nowotnik, G. and Sieniawski, J.: Influence of heat treatment on the microstructure and mechanical properties of 6005 and 6082 aluminium alloys. J. Mater. Process. Technol. 162, 367372 (2005).
13. Yoshimura, R., Konno, T.J., Abe, E., and Hiraga, K.: Transmission electron microscopy study of the early stage of precipitates in aged Al–Li–Cu alloys. Acta Mater. 51.10, 28912903 (2003).
14. Elgallad, E.M., Shen, P., Zhang, Z., and Chen, X.G.: Effects of heat treatment on the microstructure and mechanical properties of AA2618 DC cast alloy. Mater. Des. 61, 133140 (2014).
15. Zhang, F., Shen, J., Yan, X.D., Sun, J.L., Sun, X.L., and Yang, Y.: Homogenization heat treatment of 2099 Al–Li alloy. Rare Met. 33.1, 2836 (2014).
16. Kim, J.M., Seong, K.D., Jun, J.H., Shin, K., and Kim, K.T.: Microstructural characteristics and mechanical properties of Al–2.5wt%Li–1.2wt%Cu–xMg. J. Alloys Compd. 434, 324326 (2007).
17. Min, J., Zheng, Z., and Gong, Z.: Microstructure evolution of the 1469 Al–Cu–Li–Sc alloy during homogenization. J. Alloys Compd. 614, 131139 (2014).
18. Lombardi, A., Ravindran, C., and MacKay, R.: Optimization of the solution heat treatment process to improve mechanical properties of 319 Al alloy engine blocks using the billet casting method. Mater. Sci. Eng., A 633, 125135 (2015).
19. Han, N.M., Zhang, X.M., Liu, S.D., He, D.G., and Zhang, R.: Effect of solution treatment on the strength and fracture toughness of aluminum alloy 7050. J. Alloys Compd. 509.10, 41384145 (2011).
20. Yu, C., Yin, D., Zheng, F., and Yu, X.: Effects of solution treatment on mechanical properties and microstructures of Al–Li–Cu–Mg–Ag alloy. J. Cent. South Univ. 20, 20832089 (2013).
21. Li, H., Tang, Y., Zeng, Z., Zheng, Z., and Zheng, F.: Effect of ageing time on strength and microstructures of an Al–Cu–Li–Zn–Mg–Mn–Zr alloy. Mater. Sci. Eng., A 498.1, 314320 (2008).
22. Il'in, A.A., Nikitin, S.L., Osintsev, O.E., and Borisov, Y.V.: Effect of alloying elements on the structure and properties of Al–Li–Cu cast alloys. Russ. Metall. 4, 338344 (2009).
23. Liu, Q., Chen, C.Z., and Cui, J.Z.: Effect of copper content on mechanical properties and fracture behaviors of Al–Li–Cu alloy. Metall. Mater. Trans. A 36.6, 13891394 (2005).
24. Radmilovic, V., Tolley, A., Marquis, E.A., Rossell, M.D., and Lee, Z.: Monodisperse Al3(LiScZr) core/shell precipitates in Al alloys. Scr. Mater. 58.7, 529532 (2008).
25. Lin, Y., Zheng, Z.Q., and Li, S.C.: Effect of solution treatment on microstructures and mechanical properties of 2099 Al–Li alloy. Arch. Civil Mech. Eng. 14.1, 6171 (2014).
26. Sjölander, E. and Seifeddine, S.: Optimisation of solution treatment of cast Al–Si–Cu alloys. Mater. Des. 31, S44S49 (2010).
27. Li, H.Y., Su, X.J., Yin, H., and Huang, D.S.: Microstructural evolution during homogenization of Al–Cu–Li–Mn–Zr–Ti alloy. Trans. Nonferrous Met. Soc. China 23.9, 25432550 (2013).

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed