Microstructural Evolution of Semi-Solid AZ61 Magnesium Alloy during Reheating Process

Abstract:

The microstructural evolution of AZ61 semi-solid magnesium alloy during semi-solid remelting process was studied in this paper. The semi-solid billet was fabricated by strain-induced melt activation (SIMA) method. The results showed that the initial semi-solid grains melt mainly through coalescence. With the prolongation of isothermal holding time, the grains grew up and spheroidized, in which the mean diameter of grain and liquid volume fraction increased. In the meantime, the higher the holding temperature, the faster the grain grew and spheroidized. The suitable reheating temperature of AZ61 semi-solid magnesium alloy was 592
. The samples were susceptible to serious deformation beyond 597
.

• Periodical: Solid State Phenomena (Volumes 116-117)
• Pages: 275-278
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.116-117.275
• Online since: October 2006
• Authors: Hong Yan, Fa Yun Zhang
• Keywords: AZ61 Mg Alloy, Microstructural Evolution, Reheating, Thixoforming

References

[1] J. Dong, J. Z. Cui and Q.C. Le: Materials Science and Engineering Vol. A345 (2003), p.242.

[2] Y.Z. Zhang, K. Zhang and G.J. Liu: Journal of Materials Processing Technology Vol. 137 (2003), p.195.

[3] S.Y. Lee, S.I. Oh: Journal of Materials Processing Technology Vol. 130-131 (2002), p.587.

[4] H.K. Jung and C.G. Kang: Journal of Materials Processing Technology Vol. 104 (2000), p.244.

[5] YAN Hong and F. Y. Zhang: Transactions of Nonferrous Metals Society of China Vol. 15 (2005), p.560.