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Fabrication of Al7075–Al2O3np-based metal matrix composites with a high solid fraction for thixoforming

Published online by Cambridge University Press:  15 October 2018

Xiao-Hui Chen Open the ORCID record for Xiao-Hui Chen [Opens in a new window]  and
Hong Yan
Xiao-Hui Chen*
Affiliation:
School of Mechanical and Electrical Engineering, Xinyu University, Xinyu 338004, People’s Republic of China
Hong Yan*
Affiliation:
School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330031, People’s Republic of China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

For thixoforming, it is necessary to have a good microstructure of fine, uniform, and globular grains in a semisolid range. In this study, the nano-Al2O3(Al2O3np)/Al7075 composites with a high solid fraction were fabricated by specially made Al2O3np containing Mg powders and semisolid ultrasonic vibration (SSUV) process. The influence of SSUV technology on primary α-Al grain and second phase in the composites was investigated. Microstructural studies revealed that a good semisolid slurry with an average grain size of 73 μm, a shape factor of 0.84, and a solid fraction of 0.715 could be obtained. Also, it could be shown that SSUV affected largely the size and type of the second phase as well as growth and nucleation of the primary α-Al grain. TEM analysis revealed that there are well-defined crystallographic orientation relationships between the second phases and α-Al, suggesting enhanced heterogeneous nucleation in Al7075 alloys. Moreover, mechanisms involved in the development of microstructure were discussed.

Keywords

metal matrix compositesnanoparticlessemisolidmicrostructurethixoforming
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 24 , 28 December 2018 , pp. 4349 - 4361
Copyright
Copyright © Materials Research Society 2018 

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References

REFERENCES

Su, H., Gao, W.L., Feng, Z.H., and Lu, Z.: Processing, microstructure and tensile properties of nano-sized Al2O3 particle reinforced aluminum matrix composites. Mater. Des. 36, 590–596 (2012).CrossRefGoogle Scholar
Knowles, A.J., Jiang, X., Galano, M., and Audebert, F.: Microstructure and mechanical properties of 6061 Al alloy based composites with SiC nanoparticles. J. Alloys Compd. 615, S401–S405 (2014).CrossRefGoogle Scholar
Huang, S.J., Peng, W.Y., Visic, B., and Zak, A.: Al alloy metal matrix composites reinforced by WS2 inorganic nanomaterials. Mater. Sci. Eng., A 709, 290–300 (2018).CrossRefGoogle Scholar
Chen, X.H. and Yan, H.: Constitutive behavior of Al2O3np/Al7075 composites with a high solid fraction for thixoforming. J. Alloys Compd. 708, 751–762 (2017).CrossRefGoogle Scholar
Tang, Q., Zhou, M.Y., Fan, L.L., Zhang, Y.W.X., Quan, G.F., and Liu, B.: Constitutive behavior of AZ80M magnesium alloy compressed at elevated temperature and containing a small fraction of liquid. Vacuum 155, 476–489 (2018).CrossRefGoogle Scholar
Birol, Y.: Thixoforming of EN AW-2014 alloy at high solid fraction. J. Mater. Process. Technol. 211, 1749–1756 (2011).CrossRefGoogle Scholar
Bolouri, A., Shahmiri, M., and Kang, C.G.: Study on the effects of the compression ratio and mushy zone heating on the thixotropic microstructure of AA7075 aluminum alloy via SIMA process. J. Alloys Compd. 509, 402–408 (2011).CrossRefGoogle Scholar
Rokni, M.R., Zarei-Hanzaki, Z., Abedi, H.R., and Haghdadi, N.: Microstructure, evolution, and mechanical properties of backwark thixoextruded 7075 aluminum alloy. Mater. Des. 36, 557–563 (2012).CrossRefGoogle Scholar
Eskin, G.I.: Broad prospects for commercial application of the ultrasonic (cavitation) melt treatment of light alloys. Ultrason. Sonochem. 8, 319–325 (2001).CrossRefGoogle ScholarPubMed
Wu, S.S., Lü, S.L., An, P., and Nakae, H.: Microstructure and property of rheocasting aluminum-alloy made with indirect ultrasonic vibration process. Mater. Lett. 73, 150–153 (2012).CrossRefGoogle Scholar
Lin, C., Wu, S.S., Lü, S.L., An, P., and Wan, L.: Microstructure and mechanical properties of rheo-diecast hypereutectic Al–Si alloy with 2% Fe assisted with ultrasonic vibration process. J. Alloys Compd. 568, 42–48 (2013).CrossRefGoogle Scholar
Yan, H., Rao, Y.S., and He, R.: Morphological evolution of semi-solid Mg2Si/AM60 magnesiummatrix composite produced by ultrasonic vibration process. J. Mater. Process. Technol. 214, 612–619 (2014).CrossRefGoogle Scholar
Liu, Q.M., Zhai, Q.J., Qi, F.P., and Zhang, Y.: Effects of power ultrasonic treatment on microstructure and mechanical properties of T10 steel. Mater. Lett. 61, 2422–2425 (2007).CrossRefGoogle Scholar
Iqbal, N., Dijk, N.H.V., Offerman, S.E., Moret, M.P., Katgerman, L., and Kearley, G.J.: Nucleation kinetics during the solidification of aluminum alloys. J. Non-Cryst. Solids 353, 3640–3643 (2007).CrossRefGoogle Scholar
Chen, X.H. and Yan, H.: Fabrication of nanosized Al2O3 reinforced aluminum matrix composites by subtype multifrequency ultrasonic vibration. J. Mater. Res. 30, 2198–2209 (2015).CrossRefGoogle Scholar
Taghavi, F., Saghafian, H., and Kharrazi, Y.H.K.: Study on the effect of prolonged mechanical vibration on the grain refinement and density of A356 aluminum alloy. Mater. Des. 30, 1604–1611 (2009).CrossRefGoogle Scholar
Sauter, C., Emin, M.A., Schuchmann, H.P., and Tavman, S.: Influence of hydrostatic pressure and sound amplitude on the ultrasound induced dispersion and de-agglomeration of nanoparticles. Ultrason. Sonochem. 15, 517–523 (2008).CrossRefGoogle ScholarPubMed
Liu, Z.W., Han, Q.Y., Li, J.G., and Huang, W.D.: Effect of ultrasonic vibration on microstructural evolution of the reinforcements and degassing of in situ TiB2p/Al–12Si–4Cu composites. J. Mater. Process. Technol. 212, 365–371 (2012).CrossRefGoogle Scholar
Doherty, R.D., Lee, H.I., and Feest, E.A.: Microstructure of stir-cast metals. Mater. Sci. Eng. 65, 181–189 (1984).CrossRefGoogle Scholar
Chaim, R.: Grain coalescence by grain rotation in nano-ceramics. Scr. Mater. 66, 269–271 (2012).CrossRefGoogle Scholar
Bolouri, A., Shahmiri, M., and Cheshemeh, E.N.H.: Microstructural evolution during semisolid state strain induced melt activation process of aluminum 7075 alloy. Trans. Nonferrous Met. Soc. China 20, 1663–1671 (2010).CrossRefGoogle Scholar
Manson-Whitton, E.D., Stone, I.C., Jones, J.R., Grant, P.S., and Cantor, B.: Isothermal grain coarsening of spray formed alloys in the semi-solid state. Acta Mater. 50, 2517–2535 (2002).CrossRefGoogle Scholar
Schultz, B.F., Ferguson, J.B., and Rohatgi, P.K.: Microstructure and hardness of Al2O3 nanoparticle reinforced Al–Mg composites fabricated by reactive wetting and stir mixing. Mater. Sci. Eng., A 530, 87–97 (2011).CrossRefGoogle Scholar
Dong, J., Cui, J.Z., Le, Q.C., and Lu, Q.M.: Liquidus semi-continuous casting, reheating and thixoforming of a wrought aluminum alloy 7075. Mater. Sci. Eng., A 345, 234–243 (2003).CrossRefGoogle Scholar
Liu, D., Atkinson, H.V., Kapranos, P., Jirattiticharoean, W., and Jones, H.: Microstructural evolution and tensile mechanical properties of thixoformed high performance aluminium alloy. Mater. Sci. Eng., A 361, 213–224 (2003).CrossRefGoogle Scholar
Zhang, H. and Wan, J.N.: Thixoforming of spray-formed 6066 Al/SiCP composites. Compos. Sci. Technol. 61, 1233–1238 (2011).CrossRefGoogle Scholar
Qin, Q.D., Zhao, Y.G., Cong, P.J., Zhou, W., and Xu, B.: Semisolid microstructure of Mg2Si/Al composites by cooling slope cast and its evolution during partial remelting process. Mater. Sci. Eng., A 444, 99–103 (2007).CrossRefGoogle Scholar
Kirkwood, D.H.: Semisolid metal processing. Int. Mater. Rev. 39, 173–189 (1994).CrossRefGoogle Scholar
Ashouri, S., Nili-Ahmadabadi, M., Moradi, M., and Iranpour, M.: Semi-solid microstructure evolution during reheating of aluminum A356 alloy deformed severely by ECAP. J. Alloys Compd. 466, 67–72 (2008).CrossRefGoogle Scholar
Jiang, J.F., Wang, Y., and Atkinson, H.V.: Microstructural coarsening of 7005 aluminum alloy semisolid billets with high solid fraction. Mater. Charact. 90, 52–61 (2014).CrossRefGoogle Scholar
Ji, S., Fan, Z., and Bevis, M.J.: Semi-solid processing of engineering alloys by a twin-screw rheomoulding process. Mater. Sci. Eng., A 299, 210–217 (2001).CrossRefGoogle Scholar
Fan, X.G., Jiang, D.M., Meng, Q.C., and Zhong, L.: The microstructural evolution of an Al–Zn–Mg–Cu alloy during homogenization. Mater. Lett. 60, 1475–1479 (2006).CrossRefGoogle Scholar
Du, Y., Chang, Y.A., Huang, B.Y., Gong, W.P., Jin, Z.P., Xu, H.H., Yuan, Z.H., Liu, Y., He, Y.H., and Xie, F.Y.: Diffusion coefficients of some solutes in fcc and liquid Al: Critical evaluation and correlation. Mater. Sci. Eng., A 363, 140–151 (2003).CrossRefGoogle Scholar
Johnsson, M. and Eriksson, L.: Thermal expansion of Al and TiB2 in the temperature range 300 to 900 K and calculated lattice fit at the melting temperature for Al. Z. Metallkd. 89, 478–480 (1998).Google Scholar
Sanjabi, S. and Obeydavi, A.: Synthesis and characterization of nanocrystalline MgAl2O4 spinel via modified sol–gel method. J. Alloys Compd. 645, 535–540 (2015).CrossRefGoogle Scholar
Rosas, G., Reyes-Gasga, J., and Pérez, R.: Morphological characteristics of the rapidly and conventionally solidified alloys of the AlCuFe system. Mater. Charact. 58, 765–770 (2007).CrossRefGoogle Scholar
Bramfitt, B.L.: The effect of carbide and nitride additions on the heterogeneous nucleation behavior of liquid iron. Metall. Trans. 1, 1–9 (1970).CrossRefGoogle Scholar