Microstructure and mechanical properties of as-cast and extruded Mg-8Li-3Al-0.7Si alloy

作者：Yang Guo-qing; Peng Xiao-dong^*; Yang Yan^*; Li Meng-luan; Wei Guo-bing; Shao Hong-yan; Wang Bao

来源：Journal of Central South University (English Edition), 2018, 25(4): 764-771.

DOI：10.1007/s11771-018-3781-0

• Mg-Li alloy
• microstructure
• mechanical properties
• extrusion
• silicon

Mg-8Li-3Al-0.7Si alloy was prepared by casting and deformed by hot extrusion in this study. And the microstructure of as-cast and extruded specimens was analyzed with OM, XRD, SEM and EDS. Results show that the specimens are composed of alpha-Mg, beta-Li, AlLi, MgLiAl2 and Mg2Si phases. In as-extruded specimen, the microstructure is refined and the beta-Li phase has the effect of coordination during deformation. After hot extrusion, Chinese script Mg2Si phase is crushed into block-like and distributes uniformly in the matrix. Mechanical properties results show that the strength and elongation are both improved after hot extrusion.

• 出版日期2018-4
• 单位重庆大学