镁合金LPSO/SFs结构间{<inline-formula><math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mn mathvariant="normal">10</mml:mn><mml:mover accent="true"><mml:mrow><mml:mn mathvariant="normal">1</mml:mn></mml:mrow><mml:mo>¯</mml:mo></mml:mover><mml:mn mathvariant="normal">2</mml:mn></math></inline-formula>}孪晶交汇机制的原子尺度研究

镁合金LPSO/SFs结构间{

10 \bar{1} 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 {

10 \bar{1} 2

} Twin Intersection Between LPSO Structure/SFs in Magnesium Alloy

SHAO Xiaohong, PENG Zhenzhen, JIN Qianqian, MA Xiuliang

图3 LPSO/SFs间{ $10 \bar{1} 2$ }共轴孪晶交汇形成基面-基面(BB)界面和柱面-柱面(PP)界面

Fig.3 BB and PP interfaecs introduced by the co-zone { $10 \bar{1} 2$ } twins intersection between the LPSO/SFs (BB—basal-basal, PP—prismatic-prismatic, TB—twin boundary, TSFs——twinned stacking faults)
(a) low-magnification HAADF-STEM image of the wavy {

10 \bar{1} 2

} twin boundary formed by {

10 \bar{1} 2

} twin intersecting with SFs, and the corresponding EDS image showing the segregation of Zn atoms at the TB
(b) atomic-resolution HAADF-STEM image showing the TB deflected from the basal plane of ~4° (Inserted inverse fast Fourier transform (IFFT) image shows a periodic array of dislocations in the twin boundary, which was processed by masking (0002) reflection of the matrix and {

10 \bar{1} 0

} reflection of the twin)
(c) TB framed by cyan rectangle in Fig.3b deflecting from the {

10 \bar{1} 2

} plane is segregated with solute atoms
(d) the corresponding IFFT image of Fig.3c processed by masking (0002) of the matrix and {

10 \bar{1} 0

} reflection of the twin (cyan-color dashed-line circles in the inset fast Fourier transform (FFT) pattern), showing the periodic array of dislocations associated with the TB
(e) high-magnification HAADF-STEM image showing the impingement of multiple twins, leaving a triangular matrix, denoted by M in Fig.3a
(f) twin boundaries and BB boundary delineated by dashed lines, and the corresponding FFT images of TB1, TB2, and BB boundary