Impact of Intensification Pressure and Grain Refiner on the Hot Tearing Susceptibility of a Semi-Solid Cast Al-Zn-Mg-Cu Alloy

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The commercial application of wrought aluminum alloys to semi-solid casting would be extremely beneficial, as wrought alloys often exhibit better strength-ductility combinations than cast aluminum alloys. Semi-solid casting typically reduces the hot tearing tendency, as it requires a globular microstructure and produces grain refinement, but hot tearing often still occurs during the semi-solid die casting of complex-shaped components produced from wrought alloys. This study examined the impact of intensification pressure and grain refinement on the hot tearing tendency of an Al-Zn-Mg-Cu alloy. Semi-solid slurries were produced using the SEED (Swirled Equilibrium Enthalpy Device) process. A specially designed constrained rod mold was used to evaluate hot tearing. Results showed the tendency for hot tearing decreased with increasing of intensification pressure. Grain refinement (with 0.06Ti) was also found to be beneficial to the elimination of hot tearing.

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Periodical:

Solid State Phenomena (Volume 285)

Edited by:

Qiang Zhu, Ahmed Rassili, Stephen P. Midson and Xiao Gang Hu

Pages:

283-289

Citation:

H. Y. Zhao et al., "Impact of Intensification Pressure and Grain Refiner on the Hot Tearing Susceptibility of a Semi-Solid Cast Al-Zn-Mg-Cu Alloy", Solid State Phenomena, Vol. 285, pp. 283-289, 2019

Online since:

January 2019

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$41.00

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[1] Lemieux A, Langlais J, Chen X G. Reduction of Hot Tearing of Cast Semi-Solid 206 Alloys[J]. Solid State Phenomena, 2013, 192-193:101-106.

DOI: https://doi.org/10.4028/www.scientific.net/ssp.192-193.101

[2] Janudom S, Wannasin J, Kapranos P, et al. The Effect of Hot Tearing in Semi Solid Casting of Aluminum A201 Alloy[J]. Advanced Materials Research, 2013, 739:190-195.

DOI: https://doi.org/10.4028/www.scientific.net/amr.739.190

[3] J. Wannasin, D. Schwam, J. A. Yurko, C. Rohloff, and G. Woycik, Hot Tearing Susceptibility and Fluidity of Semi-Solid Gravity Cast Al-Cu Alloy, Solid State Phenomena, 116-117 (2006) 76-79.

DOI: https://doi.org/10.4028/www.scientific.net/ssp.116-117.76

[4] Li S, Apelian D, Sadayappan K. Hot Tearing in Cast Aluminum Alloys[J]. Materials Science Forum, 2011, 690(1):355-358.

DOI: https://doi.org/10.4028/www.scientific.net/msf.690.355

[5] Rathi S K, Sharma A, Sabatino M D. Effect of mould temperature, grain refinement and modification on hot tearing test in Al-7Si-3Cu alloy[J]. Engineering Failure Analysis, 2017, 79:592-605.

DOI: https://doi.org/10.1016/j.engfailanal.2017.04.037

[6] Rosenberg, R. A., Flemings, M. C., and Taylor, H. F., Nonferrous Binary Alloys Hot Tearing,, AFS Trans, vol. 69, pp.518-528. (1960).

[7] Grandfield, J. F., Davidson, C. J., Taylor, J. A., The Columnar to Equiaxed Transition in Horizontal Direct Chill Cast Magnesium Alloy AZ91,, Light Metals, 911-917 (2001).

DOI: https://doi.org/10.1002/3527607331.ch36

[8] Doutre D, Hay G, Wales P, et al. THE SEED PROCESS FOR SEMI-SOLID FORMING[J]. Canadian Metallurgical Quarterly, 2004, 43(2):265-272.

DOI: https://doi.org/10.1179/000844304794410075

[9] Saveiko, V. N., Theory of Hot Tearing,, Russian Castings Production, vol. 11, pp.453-456 (1961).