Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
LASMIS, Université de Technologie de Troyes, Troyes 10001, France;
residual stress; moiré interferometry; hole-drilling; nanocrystalline; FSW;