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Effect of Fe on microstructures and mechanical properties of an Al–Mg–Si–Cu–Cr–Zr alloy prepared by low frequency electromagnetic casting

Published online by Cambridge University Press:  10 May 2017

Yi Meng ,
Jian-zhong Cui  and
Zhi-hao Zhao
Yi Meng*
Affiliation:
School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, People’s Republic of China
Jian-zhong Cui
Affiliation:
Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People’s Republic of China
Zhi-hao Zhao
Affiliation:
Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: mengyi@ncut.edu.cn
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Abstract

The effects of different Fe contents (0.168, 0.356 and 0.601 wt%) on microstructures and mechanical properties of the Al–1.6Mg–1.2Si–1.1Cu–0.15Cr–0.15Zr (all in wt%) alloys prepared by low frequency electromagnetic casting process were investigated in the process of solidification, hot extrusion, solid solution and aging treatments. The results show that the increase of Fe content promotes the formation of feathery grains in the process of solidification and the precipitation of another important strengthening phase Q′ with small size. Additionally, it also results in no recrystallization even after solid solution at a high temperature of 550 °C, which is because of the increase number of elliptical shaped and fine DO22-Al3Zr dispersoids (∼70 nm long and ∼35 nm wide) and the spherical or elliptical shaped Fe-containing phases. When Fe content of the alloy increases to 0.356 wt%, both the ultimate tensile strength and yield strength of the alloy-T6 increase by more than 60 MPa and with little cost of ductility.

Keywords

Almicrostructurestrength
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 11 , 14 June 2017 , pp. 2067 - 2078
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

REFERENCES

Zhong, H., Rometsch, P.A., Cao, L.F., and Estrin, Y.: The influence of Mg/Si ratio and Cu content on the stretch formability of 6xxx aluminium alloys. Mater. Sci. Eng., A 651, 688 (2016).CrossRefGoogle Scholar
Eskin, D.G., Massardier, V., and Merle, P.: A study of high-temperature precipitation in Al–Mg–Si alloys with an excess of silicon. J. Mater. Sci. 34, 811 (1999).CrossRefGoogle Scholar
Murayama, M., Hono, K., Miao, W.F., and Laughlin, D.E.: The effect of Cu additions on the precipitation kinetics in an Al–Mg–Si alloy with excess Si. Metall. Mater. Trans. A 32, 239 (2001).CrossRefGoogle Scholar
Zhen, L., Fei, W.D., Kang, S.B., and Kim, H.W.: Precipitation behaviour of Al–Mg–Si alloys with high silicon content. J. Mater. Sci. 32, 1895 (1997).CrossRefGoogle Scholar
Miao, W.F. and Laughlin, D.E.: Effects of Cu content and preaging on precipitation characteristics in aluminum alloy 6022. Metall. Mater. Trans. A 31, 361 (2000).CrossRefGoogle Scholar
Imatsuda, K., Uetani, Y., Sato, T., and Ikeno, S.: Metastable phases in an Al–Mg–Si alloy containing copper. Metall. Mater. Trans. A 32, 1293 (2001).CrossRefGoogle Scholar
Weatherly, G.C., Perovic, A., Mukhopadhyay, N.K., Lloyd, D.J., and Perovic, D.D.: The precipitation of the Q phase in an AA6111 alloy. Metall. Mater. Trans. A 32, 213 (2001).CrossRefGoogle Scholar
Lodgaard, L. and Ryum, N.: Precipitation of dispersoids containing Mn and/or Cr in Al–Mg–Si alloys. Mater. Sci. Eng., A 283(1–2), 144 (2000).CrossRefGoogle Scholar
Han, Y., Ma, K., Li, L., Chen, W., and Nagaumi, H.: Study on microstructure and mechanical properties of Al–Mg–Si–Cu alloy with high manganese content. Mater. Des. 39, 418 (2012).CrossRefGoogle Scholar
Cabibbo, M. and Evangelista, E.: A TEM study of the combined effect of severe plastic deformation and (Zr), (Sc + Zr)-containing dispersoids on an Al–Mg–Si alloy. J. Mater. Sci. 41, 5329 (2006).CrossRefGoogle Scholar
Clouet, E., Barbu, A., Laé, L., and Martin, G.: Precipitation kinetics of Al3Zr and Al3Sc in aluminum alloys modeled with cluster dynamics. Acta Mater. 53(8), 2313 (2005).CrossRefGoogle Scholar
Zhang, Y.J., Ma, N.H., Yi, H.Z., Li, S.C., and Wang, H.W.: Effect of Fe on grain refinement of commercial purity aluminum. Mater. Des. 27(9), 794 (2006).CrossRefGoogle Scholar
Zhang, Y.J., Wang, H.W., Ma, N.H., and Li, X.F.: Effect of Fe on grain refining of pure aluminum refined by Al–5Ti–B master alloy. Mater. Lett. 59(27), 3398 (2005).CrossRefGoogle Scholar
Yi, J.Z., Gao, Y.X., Lee, P.D., and Lindley, T.C.: Effect of Fe-content on fatigue crack initiation and propagation in a cast aluminum–silicon alloy A356-T6. Mater. Sci. Eng., A 386(1–2), 396 (2004).CrossRefGoogle Scholar
Crepeau, P.N.: Effect of iron in Al–Si casting alloys: A critical review. Trans. Am. Foundrymen’s Assoc. 103, 361 (1995).Google Scholar
Kobayashi, T.: Strength and fracture of aluminum alloys. Mater. Sci. Eng., A 280(1), 8 (2000).CrossRefGoogle Scholar
Bergsma, S.C., Kassner, M.E., Li, X., and Wall, M.A.: Strengthening in the new aluminum alloy AA6069. Mater. Sci. Eng., A 254(1–2), 112 (1998).CrossRefGoogle Scholar
Bergsma, S.C., Kassner, M.E., Li, X., Delos-Reyes, M.A., and Hayes, T.A.: The optimized mechanical properties of the new aluminum alloy AA6069. J. Mater. Eng. Perform. 5, 111 (1996).CrossRefGoogle Scholar
Bergsma, S.C. and Kassner, M.E.: The new aluminum alloy AA6069. Mater. Sci. Forum 217–222, 1801 (1996).CrossRefGoogle Scholar
Meng, Y., Cui, J.Z., Zhao, Z.H., and He, L.Z.: Effect of Zr on microstructures and mechanical properties of an Al–Mg–Si–Cu–Cr alloy prepared by low frequency electromagnetic casting. Mater. Charact. 92, 138 (2014).CrossRefGoogle Scholar
Henry, S., Jarry, P., and Rappaz, M.: 〈110〉 dendrite growth in aluminum feathery grains. Metall. Mater. Trans. A 29, 2807 (1998).CrossRefGoogle Scholar
Turchin, A.N., Zuijderwijk, M., Pool, J., Eskin, D.G., and Katgerman, L.: Feathery grain growth during solidification under forced flow conditions. Acta Mater. 55(11), 3795 (2007).CrossRefGoogle Scholar
Henry, S., Minghetti, T., and Rappaz, M.: Dendrite growth morphologies in aluminium alloys. Acta Mater. 46(18), 6431 (1998).CrossRefGoogle Scholar
Kumar, S. and O’Reilly, K.A.Q.: Influence of Al grain structure on Fe bearing intermetallics during DC casting of an Al–Mg–Si alloy. Mater. Charact. 120, 311 (2016).CrossRefGoogle Scholar
Kumar, S., Grant, P.S., and O’Reilly, K.A.Q.: Fe bearing intermetallic phase formation in a wrought Al–Mg–Si alloy. Trans. Indian Inst. Met. 65(6), 533 (2012).CrossRefGoogle Scholar
Kumar, S., Grant, P.S., and O’Reilly, K.A.Q.: Evolution of Fe bearing intermetallics during DC casting and homogenization of an Al–Mg–Si Al alloy. Metall. Mater. Trans. A 47, 3000 (2016).CrossRefGoogle Scholar
Verma, A., Kumar, S., Grant, P.S., and O’Reilly, K.A.Q.: Influence of cooling rate on the Fe intermetallic formation in an AA6063 Al alloy. J. Alloys Compd. 555, 274 (2013).CrossRefGoogle Scholar
Zhao, Q.R., Qian, Z., Cui, X.L., Wu, Y.Y., and Liu, X.F.: Influences of Fe, Si and homogenization on electrical conductivity and mechanical properties of dilute Al–Mg–Si alloy. J. Alloys Compd. 666, 50 (2016).CrossRefGoogle Scholar
Chen, J.H., Costan, E., Van Huis, M.A., Xu, Q., and Zanbergen, H.W.: Atomic pillar-based nanoprecipitates strengthen AlMgSi alloys. Science 312(5772), 416 (2006).CrossRefGoogle ScholarPubMed
Yassar, R.S., Field, D.P., and Weiland, H.: The effect of predeformation on the β′ and β′ precipitates and the role of Q′ phase in an Al–Mg–Si alloy: AA6022. Scr. Mater. 53(3), 299 (2005).CrossRefGoogle Scholar