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Microstructure and Deformation Behavior of as-Extruded Mg-11Li Based Alloy

机译：用挤出的Mg-11Li基合金组织和变形行为

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Additions of Li to Mg alloys can transform the hcp to bcc, substantially increasing the ductility of the Mg-Li alloys and further reducing its density. Mg-Li alloys exhibit two phase structures between 5 and 10 wt% Lithium content consisting of a(hcp) Mg-rich and β(bcc) Li-rich phases. Mg- Li binary alloys containing greater than approximately 11 wt% Li form a single phase bcc microstructure (β phase). Mg-11Li alloys were prepared in a mild steel crucible under the protection of mixed gas of CO2/0.5%SF6 using commercial stock. The melt was held at 720°C for 20 min and then poured into a mould at 200°C. And then, the as-cast Mg alloys were homogenized by holding at 350°C for 4 hours. The homogenized alloys were hot-extruded into a rod that was 12 mm in thickness with a reduction ratio of 40:1. The microstructures and deformation behavior of extruded specimens were examined by XRD, SEM, OM, tensile test.
机译：Li对Mg合金的添加可以将HCP转化为BCC，基本上增加Mg-Li合金的延展性并进一步降低其密度。 Mg-Li合金在5-10wt％锂含量之间表现出两种相结构，其由富含（HCP）Mg的富含β（BCC）富β（BCC）富含相。 Mg-Li二元合金含有大于约11wt％的Li，形成单相BCC微结构（β相）。使用商业原料，在保护CO 2 / 0.5％SF6的混合气体下以温和的钢坩埚制备Mg-11LI合金。将熔体保持在720℃下20分钟，然后在200℃下倒入模具中。然后，通过在350℃下保持4小时，使得铸造Mg合金均化。将均化合金热挤出成12毫米的厚度，厚度为40：1。 XRD，SEM，OM，拉伸试验检查挤出样品的微观结构和变形行为。

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