镁合金LPSO/SFs结构间{101¯2}孪晶交汇机制的原子尺度研究

邵晓宏, 彭珍珍, 靳千千, 马秀良

Unravelling the {101¯2} Twin Intersection Between LPSO Structure/SFs in Magnesium Alloy

SHAO Xiaohong, PENG Zhenzhen, JIN Qianqian, MA Xiuliang

图5 LPSO与TSFs间Mg片层内{101¯2}孪晶相交形成BB界面

Fig.5 Microstructure of BB interfaces formed in the Mg layers sandwiched between LPSO and TSFs with a spacing of ~20  nm (a) high-magnification HAADF-STEM image of BB boundary between LPSO and TSFs, shown by the yellow arrows (b, c) atomic-resolution HAADF-STEM image of the BB boundary of ~11° denoted by b and c in Fig.5a. The array of dislocations processed by masking (0002) reflections of the left and right twin (cyan-color dashed-line circles in the inset FFT pattern) are imposed on the BB boundaries. The original triangular LPSO remains at the intersection between the intersection of left and right twins, where the AB'C'A building blocks are denoted by the red lines in Fig.5b, and very small local SFs with matrix orientation, which was framed by the dashed rectangle in Fig.5c (Inset shows the FFT pattern of the left and right twin. The shearing of LPSO caused by the twin intersection was indicated by the red arrows in Figs.5a and b)