Investigation on the Simultaneous Effects of Zn Additions and Critical Ingate Velocity on the Hot Tearing Susceptibility of A356 and A206 Aluminum Alloys

Document Type : Original Article


1 Department of Materials and Metallurgy Engineering, Iran University of Industries and Mines (IUIM), Tehran, Iran

2 Center of Excellence for High Strength Alloys Technology (CEHSAT), School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran

3 Department of Advanced Materials and Renewable Energy, Iranian Research Organization for Science and Technology


In this study, the simultaneous effects of Zn addition and critical gate velocity on hot tearing susceptibility of A356 and A206 aluminum alloys were investigated. In order to investigate these two parameters, ingate velocities of 0.5, 0.75, 1, 1.5 m/s were taken into account. After performing the casting process, the samples were investigated by visual examination, and scanning electron microscopy. In order to quantitative evaluation of results, ProCast software were used. The results of the present study showed that increasing the Zn content for alloy A356, had no effect on hot tearing susceptibility of this alloy, while with increasing the Zn content from 0.01 to 2.8 wt%, the number and severity of the tears were increased.


[1] Shimin Li, "Hot Tearing in Cast Aluminum Alloys: Measures and Effects of Process Variables ", PhD thesis,
Worcester Polythchnic Institute, (2010).
[2] J. Campbell, "castings", Butterworth-Heinmann, Second Edition, (2003), 20.
[3] M. Nasr Esfahani, B. Niroumand, Mater. Charact. , 61(2010), 318.
[4] Y. Wang, Q. Wang, Mater. Lett. , 57 (2002), 929.
[5] J. Song, Z. Wang, Mater. Des. , 87(2015), 57.
[6] A. Stangeland, A. Mo, M.M. Hamdi, D. Viano, C. Davidson, Metall. Mater. Trans.,A 37(2006),705.
[7] Y. Turen, Mater. Des. , 49(2013), 1009.
[8] S. Li, K. Sadayappan, D. Apelian, Mater. Sci. Forum, 57(2009) 618.
[9] Z. Weichao, L. Shouangshou, J. of Rare Earths, 24(2006), 346.
[10] J. M. Drezet, M. Rappaz, "Validation of a new hot tearing criterion using the ring mould test", First
EsaForm Conference on material forming, France March (1998).
[11] G.K. Sigworth, J.F. Major. , Light Met. , (2006), 795.
[12] G.K. Sigworth, F. DeHart, AFS Trans., 45, (2003), 314.
[13] W. Sequeria, V. Pikhovich, D. Weiss, Mod. Cast. , (2006), 38.
[14] Z. Zhen, N. Hort, O. Utke, Magnesium Technol., (2009).
[15] G. Upadhya, S. Cheng, and U. Chandra, Light Met. , (1995), 1101.
[16] J. Campbell, "Casting Practice: The 10 Rules of Castings", Elsevier Butterworth-Heinemann, First
Published, (2004), 9.
[17] S. Li, K. Sadayappan, D. Apelian, Int. J. Cast Met. Res. ,24, 2 (2011