Microstructure and Rheological Properties of Semi-Solid 7075 Slurries Using SEED Rheocasting Process

Abstract:

The SEED rheocasting process was used to produce semisolid slurries of high strength 7075 aluminum wrought alloys. The effects of the SEED processing parameters on the microstructure of semisolid slurries were studied. The impact of grain refinement on the grain morphology and size was investigated. The rheological properties of semisolid 7075 alloys were characterized at different solid fractions using a parallel plate compression viscometer. Results indicated that the grain refinement could greatly improve the globularity of α-Al grains and rheoformability. The relationships between viscosity and shear rate at different solid fractions in the transient state for both unrefined and refined semisolid slurries were evaluated and discussed.

• Periodical: Solid State Phenomena (Volume 256)
• Pages: 288-293
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.256.288
• Online since: September 2016
• Authors: Amir Bolouri, Qin Fu Zhao, Pascal Côté, X.-G. Chen*
• Keywords: 7075 Aluminium Alloy, Grain Refinement, Microstructure, Rheological Properties, SEED Rheocasting Process, Semisolid Forming

References

[1] S. Chayong, H. V. Atkinson, and P. Kapranos, Mater. Sci. Eng. A, 390 (2005) 3–12.

[2] A. Bolouri and C. G. Kang, Renew. Energy, 71 (2014) 616–628.

[3] A. Bolouri, M. Shahmiri, and C. G. Kang, J. Mater. Sci., 47(2012) 3544–3553.

[4] J. Langlais, N. Andrade, A. Lemieux, X. G. Chen, and L. Bucher, Solid State Phenom., 141–143 (2008) 511–516.

DOI: 10.4028/www.scientific.net/ssp.141-143.511

[5] U. A. Curle, Trans. Nonfer. Met. Soc. China (English Ed. ), 20 (2010) 1719–1724.

[6] I. -G. Chung, A. Bolouri, and C. Kang, Int. J. Adv. Manuf. Technol., 58 (2011) 237–245.

[7] P. Côté, M. E. Larouche and X. G. Chen, Solid State Pheno., 192-193 (2013) 373-378.

[8] J. Yurko and M. C. Flemings, Metall. Mater. Trans. A, 33 (2002) 2737–2746.

[9] E. J. Zoqui and L. V. Torres, Mater. Res., 13 (2010) 305–318.

[10] H. V. Atkinson, Comprehensive Materials Processing. Elsevier, (2014).

[11] D. Kirkwood and P. Ward, Steel Res., 75 (2004) 519–524.

[12] P. Kapranos, T. Y. Liu, H. V. Atkinson, and D. H. Kirkwood, J. Mater. Process. Technol., 111 (2001) 31–36.

[13] H. V. A. T.Y. Liu P. Kapranos, D.H. Kirkwood and S.C. Hogg, Metall. Mater. Trans. A, 34 (2003) 1545–1554.

[14] M. Tebib, F. Ajersch and X. -G. Chen, Solid State Pheno., 192-193 (2013) 323-328.

[15] Y. Birol, J. Alloys Comp., 486 (2009) 173–177.

[16] I. -G. Chung, A. Bolouri, and C. Kang, Int. J. Adv. Manuf. Technol., 58 (2011) 237–245.