Microstructural Evolution during Partial Melting and Semisolid Forming Behaviors of Two Hot-Extruded Magnesium-Rare Earth AlloysJian-Sheng Zhang, Jie Zhou, Yu-Feng Xia, Qian Li, Yao Tang and Yi MengMATEC Web Conf., 220 (2018) 01005DOI: https://doi.org/10.1051/matecconf/201822001005