Investigation of the Semisolid Rheological Characteristics of AZ91D Alloy

Abstract:

The semisolid shear rheological characteristic of AZ91D alloy were investigated. The results show that: during the shear rheological test at 570 °C, a critical shear stress and a maximum shear stress are happened. And with holding time increasing, the solid fraction decreasing and the solid particles distributing more uniformly, the rheological rate increases but the critical and maximum shear stress decrease. At last, based on rheological theory, a five-component rheological model of the semisolid AZ91D alloy is established, which is H1 - (N1 / H2) - (N2 / S).

• Periodical: Applied Mechanics and Materials (Volume 723)
• Pages: 742-746
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.723.742
• Online since: January 2015
• Authors: Xiao Ping Zheng*, Hong Bin Li, Ze Sheng Ji
• Keywords: AZ91D Alloy, Mechanical Model, Rheological Characteristics, Semi-Solid Metal Process

References

[1] Z. Fan. Inter. Mater. Rev., Vol. 47 (2002), p.49.

[2] H. V. Atkinson. Proc. in Mater. Sci., Vol. 50(2004), p.341.

[3] Liu Zheng, Zhang Kui, Zeng Xiaoqin. Magnesium alloys theory and its application. Metallurgical Industry Publications, China (2002).

[4] Yoshizawa Se, Lv Xinyu, Wang Guohui, et al. Heat Treatment of Metals, Vol. 28(2003), p.8.

[5] F. Czerwinski. Mater. Sci. and Eng.: A, Vol. 367(2004), p.261.

[6] Yoshizawa Se, Q. F. Li, Z. J. Liu, et al. China J. of nonferrous metals, Vol. 13 (2003), p.1156.

[7] S. Kleiner, O. Beffort, M. Fuchs, et al. Proceedings of the 7th S2P Advanced Semisolid Processing of Alloys and Composites, Tokyo, 2002, p.257.

[8] Yuan Longyu. Rheological mechanics. Science Press, China (1986).

[9] Lin Bainian. Rheology of Cast. Harbin Institute of Technology Press, China (1991).

[10] S. M. Xing, D. B. Zeng, J. T. Shi, et al. Foundry, Vol. 50(2001), p.66.