新型低合金化高强Mg-0.2Ce-0.2Ca合金挤压过程中的组织演变机理

李景仁, 谢东升, 张栋栋, 谢红波, 潘虎成, 任玉平, 秦高梧

Microstructure Evolution Mechanism of New Low-Alloyed High-Strength Mg-0.2Ce-0.2Ca Alloy During Extrusion

LI Jingren, XIE Dongsheng, ZHANG Dongdong, XIE Hongbo, PAN Hucheng, REN Yuping, QIN Gaowu

图6 距离挤压出口7.5 mm 位置处的典型EBSD和TEM结果

Fig.6 Typical EBSD and TEM images at the position of 7.5 mm below extrusion die exit of Mg-0.2Ce-0.2Ca billet (a) EBSD IPF map (b) GB and TB (c) IPF (d) selected area from Fig.6a (e-j) TEM images showing dislocation tangles (e), DRXed grains (f), LAADF-STEM image (g), <c>-component dislocation (h, i), and HAADF-STEM image (j) (LAADF-STEM, HAADF-STEM—low and high angle annular dark-field scanning transmisson electron microscopy, respectively)