Influence of Stirring Time and Holding Time on Microstructure and Properties of the A356 Alloy Modified by Sc

Abstract:

Effects of the holding time and the stirring time on the microstructure and mechanical properties of A356 alloy modified by Sc are researched. According to the test results, most of the eutectic silicon phases have changed to the shape of creeping point, dispersed in the grain boundary of α (Al) phase while stirring 1 minute, in which case both the tensile strength and elongation reach the highest, resulting in the best modification effect. The results also indicate that microstructure and mechanical properties of the alloy reach are the best modification effect when the melt is held 15 minute. It can be known that the optimal stirring time is 1 minute and the optimal holding time is 15 minute in the experiment condition of the work.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 687-690
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.687
• Online since: August 2013
• Authors: Su Zhang, Gang Yang*, Jian Hong Yi, Hong Yan
• Keywords: A356 Aluminum Alloy, Holding Time, Sc, Stirring Time

References

[1] Xiong Hongling, The Study on Thermal Analysis Technology of Hypoeutectic Aluminum-Silicon Alloy, Wuhan: Huazhong University of Science &Technology, 2007[in chinese].

[2] HE Binfeng, MI Guofa, Effect of Modification on Properties of ZL101 Alloy. Hot Working Technology, Vol. 41, No. 13(2012), 26-28.

[3] A. Knuutinen, K. Nogita and S.D. McDonald, etc., Porosity formation in aluminium alloy A356 modified with Ba, Ca, Y and Yb, Journal of Light Metals, Vol. 1(2001), 241-249.

DOI: 10.1016/s1471-5317(02)00006-8

[4] Yang Shaohua, Qiu Zhuxian and Zhang Mingjie, Application and Production of Al-Sc Alloy, Light Metals, Vol. 4(2006), 55-57.