Single β-type Mg–12Li and Mg–12Li–1Al (wt %) alloy sheets were prepared by casting, followed by cold rolling. Microstructure and texture analysis were carried out on the alloy samples using optical microscopy, scanning electron microscope, X-ray diffractometry, and microhardness testing. The results indicated that cold-rolled alloys exhibited elongated grains in rolling direction with many slip lines and deformation bands. No recrystallization was observed during the whole cold rolling process. The microhardness was from 40 to 55 HV for Mg–12Li and 60 to 85 HV for Mg–12Li–1Al, indicating that the aluminum (Al) addition improved the strain hardening of Mg–12Li. Texture evolution analysis revealed that (111) [110] was the preferred orientation during deformation in both alloys, while the addition of Al in the as-cast Mg–12Li not only lowered the {200} pole figure intensity but also occupied the (111) [110] orientation in the alpha and gamma fiber maps.

中文翻译：

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冷轧超轻镁锂合金的显微硬度和组织演变

β型Mg-12Li和Mg-12Li-1Al（wt％）合金薄板的制备方法是先铸造，然后冷轧。使用光学显微镜，扫描电子显微镜，X射线衍射仪和显微硬度测试对合金样品进行了显微组织和织构分析。结果表明，冷轧合金在轧制方向表现出拉长的晶粒，具有许多滑移线和变形带。在整个冷轧过程中未观察到重结晶。Mg–12Li的显微硬度为40至55 HV，Mg–12Li–1Al的显微硬度为60至85 HV，表明添加铝（Al）改善了Mg–12Li的应变硬化。织构演变分析表明，两种合金在变形过程中首选（111）[110]取向，