Projects (50872111, 50902113, 61274081) supported by the National Natural Science Foundation of China;Project (2011CB610406) supported by the National Basic Research Program of China;Project (B08040) supported by the 111 Project of China;Project (JC20100228) supported by Foundation for Fundamental Research of Northwestern Polytechnical University (NPU), China;Project (SKLSP201012) supported by the Research Fund of the State Key Laboratory of Solidification Processing (NPU), China