School of Material Science and Engineering;
Hebei University of Technology;
Tianjin 300130;
China;
College of Physics and Electronic Engineering;
Xingtai University;
Xingtai 054001;
China;
School of Material Science and Engineering;
Tianjin University;
Tianjin 300130;
China;
CITIC Dicastal Co.Ltd.;
Qin Huangdao 066011;
China;
Qinhuangdao WKW Automotive Parts Co.;
Ltd.;
Qin Huangdao 066011;
China;
A356.2 alloy; Al-6Sr-7La; Fatigue property; Eutectic Si; Twins;