National Key Laboratory for Remenufacturing, Armored Force Engineering Institute, Beijng 100072, China;
Department of Basic Course, Ordnance Engineering College, Shijiazhuaug 050003, China;
Department of Basic Course, Ordnance Engineering College, Shijiazhuaug 050003, China;
Department of Basic Course, Ordnance Engineering College, Shijiazhuaug 050003, China;
Beijing Aeronautical Technology Research Center, Beijing 100076, China;
National Key Laboratory for Remenufacturing, Armored Force Engineering Institute, Beijng 100072, China;
stray field; metal magnetic memory; applied stress; residual stress; fracture; microstructure;