Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-25T05:45:34.363Z Has data issue: false hasContentIssue false
  • English
  • Français

Formation of Fe-rich intermetallic compounds and their effect on the tensile properties of squeeze-cast Al–Cu alloys

Published online by Cambridge University Press:  07 August 2015

Wei-wen Zhang ,
Bo Lin ,
Zhi Luo ,
Yu-liang Zhao  and
Yuan-yuan Li
Wei-wen Zhang
Affiliation:
Department of Material Forming and Control Engineering, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
Bo Lin*
Affiliation:
Department of Material Forming and Control Engineering, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China; and Department of Material Forming and Control Engineering, School of Mechanical Engineering, Gui Zhou University, Guiyang 550025, People's Republic of China
Zhi Luo
Affiliation:
Department of Material Forming and Control Engineering, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
Yu-liang Zhao
Affiliation:
Department of Material Forming and Control Engineering, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
Yuan-yuan Li
Affiliation:
Department of Material Forming and Control Engineering, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

The development of high performance Al–Cu based alloys generally depends on the strict control of the Fe content. However, with the increasing use of recycled aluminum alloys, it is necessary to increase the tolerance for the Fe content in Al–Cu cast alloys for the purpose of low cost, energy saving, and environment protection. In this study, the formation of Fe-rich intermetallics and their effect on the tensile properties of squeeze-cast Al–5.0 wt% Cu–0.6 wt% Mn alloys with an Fe content of up to 1.5 wt% have been investigated. The full formation sequence of squeeze-cast Al–5.0 wt% Cu–0.6 wt% Mn alloys with different Fe contents has been established. The results were also compared with the corresponding results obtained for Al–5.0Cu–0.6Mn alloys prepared by gravity die casting. It is found that the Fe-rich intermetallic compounds mainly consist of α-Fe and β-Fe in alloys with a low Fe content, changing into Al6(FeMn) and Al3(FeMn) for alloys with a high Fe content. The applied pressure promotes the formation of the Fe-rich intermetallics α-Fe/Al6(FeMn) and prevents the precipitation of needle-like β-Fe/Al3(FeMn). The elongation of the alloys gradually decreases with the Fe content, and a maximum value for both the ultimate mechanical strength and the yield strength was found for the alloys with 0.5 wt% Fe. The tensile properties of alloys with a different Fe content significantly increased as the applied pressure was increased from 0 to 75 MPa, especially the elongation.

Keywords

Alsecond phasesphase transformation
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 16 , 28 August 2015 , pp. 2474 - 2484
Copyright
Copyright © Materials Research Society 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Cao, X. and Campbell, J.: Morphology of β-Al5FeSi phase in Al-Si cast alloys. Mater. Trans. 47(5), 1303 (2006).Google Scholar
Cao, X. and Campbell, J.: The solidification characteristics of Fe-rich intermetallics in Al-11.5 Si-0.4 Mg cast alloys. Metall. Mater. Trans. A 35(5), 1427 (2004).CrossRefGoogle Scholar
Cao, X. and Campbell, J.: The nucleation of Fe-rich phases on oxide films in Al-11.5 Si-0.4 Mg cast alloys. Metall. Mater. Trans. A 34(7), 1409 (2003).CrossRefGoogle Scholar
Hwang, J.Y., Dotyb, H.W., and Kaufman, M.J.: The effects of Mn additions on the microstructure and mechanical properties of Al-Si-Cu casting alloys. Mater. Sci. Eng., A 488, 496 (2008).Google Scholar
Backerud, L., Chai, G., and Tamminen, J.: Solidification Characteristics of Aluminum Alloys, Vol. 2 (AFS, Foundry Alloys, Oslo, Norway, 1990).Google Scholar
Talamantes-Silva, M.A., Rodriguez, A., Talamantes-Silva, J., Valtierra, S., and Colas, R.: Characterization of an Al-Cu cast alloy. Mater. Charact. 59, 1434 (2008).Google Scholar
Tseng, C.J., Lee, S.L., Wu, T.F., and Lin, J.C.: Effects of Fe content on microstructure and mechanical properties of A206 alloy. Mater. Trans. Jim 41(6), 708 (2000).Google Scholar
Tseng, C.J., Lee, S.L., Wu, T.F., and Lin, J.C.: Effects of manganese on microstructure and mechanical properties of A206 alloys containing iron. J. Mater. Res. 17(9), 2243 (2002).Google Scholar
Liu, K., Cao, X., and Chen, X.G.: Solidification of iron-rich intermetallic phases in Al-4.5Cu-0.3Fe cast Alloy. Metall. Mater. Trans. A 42(7), 2004 (2011).Google Scholar
Liu, K., Cao, X., and Chen, X.G.: Effect of Mn, Si, and cooling rate on the formation of iron-rich intermetallics in 206 Al-Cu cast alloys. Metall. Mater. Trans. B 43(5), 1231 (2012).CrossRefGoogle Scholar
Kamga, K.H., Larouche, D., Bournane, M., and Rahem, A.: Mechanical properties of aluminium-copper B206 alloys with iron and silicon additions. Int. J. Cast Met. Res. 25(1), 15 (2012).Google Scholar
Kamga, K.H., Larouche, D., Bournane, M., and Rahem, A.: Solidification of aluminum-copper B206 alloys with iron and silicon additions. Metall. Mater. Trans. A 41A, 2844 (2010).Google Scholar
Liu, K., Cao, X., and Chen, X.G.: A new iron-rich intermetallic-AlmFe phase in Al-4.6Cu-0.5Fe cast alloy. Metall. Mater. Trans. A 43A, 1097 (2012).Google Scholar
Liu, K., Cao, X., and Chen, X.G.: Precipitation of iron-rich intermetallic phases in Al-4.6Cu-0.5Fe-0.5Mn cast alloy. J. Mater. Sci. 47, 4290 (2012).CrossRefGoogle Scholar
Liu, K., Cao, X., and Chen, X.G.: Formation and phase selection of iron-rich intermetallics in Al-4.6Cu-0.5Fe cast alloys. Metall. Mater. Trans. A 44(2), 682 (2013).Google Scholar
Liu, K., Cao, X., and Chen, X.G.: Tensile properties of Al-Cu 206 cast alloys with various iron contents. Metall. Mater. Trans. A 45(5), 2498 (2014).Google Scholar
Dong, J.X., Karnezis, P.A., Durrant, G., and Cantor, B.: The effect of Sr and Fe additions on the microstructure and mechanical properties of a direct squeeze cast Al-7Si-0.3Mg alloy. Metall. Mater. Trans. A 30A, 1341 (1999).Google Scholar
Zhang, W.W., Lin, B., Fan, J.L., Zhang, D.T, and Li, Y.Y.: Microstructures and mechanical properties of heat-treated Al-5.0Cu-0.5Fe squeeze cast alloys with different Mn/Fe ratio. Mater. Sci. Eng., A 588, 366 (2013).CrossRefGoogle Scholar
Lin, B., Zhang, W.W., Lou, Z.H., Zhang, D.T., and Li, Y.Y.: Comparative study on microstructures and mechanical properties of the heat-treated Al-5.0Cu-0.6Mn-xFe alloys prepared by gravity die casting and squeeze casting. Mater. Des. 59, 10 (2014).Google Scholar
Sweet, L., Zhu, S.M., Gao, S.X., Taylor, J.A., and Easton, M.A.: The effect of iron content on the iron-containing intermetallic phases in a Cast 6060 aluminum alloy. Metall. Mater. Trans. A 42A, 1737 (2011).Google Scholar
Mondolfo, L.F.: Aluminum Alloys: Structure and Properties (Butterworths, London, UK, 1976).Google Scholar
Belov, N.A., Aksenov, A.A., and Eskin, D.G.: Iron in Aluminium Alloys: Impurity and Alloying Element (CRC Press, London, UK, 2002).Google Scholar
Maeng, D.Y., Lee, J.H., Won, C.W., Cho, S.S., and Chun, B.S.: The effects of processing parameters on the microstructure and mechanical properties of modified B390 alloy in direct squeeze casting. J. Mater. Process. Technol. 105, 196 (2000).Google Scholar
Maleki, A., Shafyei, A., and Niroumand, B.: Effects of squeeze casting parameters on the microstructure of LM13 alloy. J. Mater. Process. Technol. 209, 3790 (2009).Google Scholar
Westengen, H.: Formation of intermetallic compounds during DC-casting of a commercial purity Al-Fe-Si. Z. Metallkd. 73(6), 360 (1982).Google Scholar
Li, Y.J. and Arnberg, L.: Solidification structures and phase selection of iron-bearing eutectic particles in a DC-cast AA5182 alloy. Acta. Mate. 52(9), 2673 (2004).Google Scholar
Dutta, B. and Rettenmayr, M.: Effect of cooling rate on the solidification behaviour of Al-Fe-Si alloys. Mater. Sci. Eng., A 283(1), 218 (2000).Google Scholar
Arnberg, L., Backerud, L., and Chai, G.: Solidification Characteristics of Aluminum Alloys (AFS Inc., Des Plaines, IL, 1996).Google Scholar
Batyshev, A.I.: Crystallization of Metals and Alloys under Pressure (Cambridge International Science Publishers, London, UK, 2002).Google Scholar
Sobczak, J.J., Drenchev, L., and Asthana, R.: Effect of pressure on solidification of metallic materials. Int. J. Cast Met. Res. 25(1), 1 (2012).Google Scholar