Nie, K.B., Wang, X.J., Deng, K.K., Xu, F.J., Wu, K. and Zheng, M.Y. (2014) Microstructures and Mechanical Properties of AZ91 Magnesium Alloy Processed by Multidirectional Forging under Decreasing Temperature Conditions. Journal of Alloys and Compounds, 617, 979-987.