Microstructure and mechanical properties of Mg-8Li-xAl-0.5Ca alloys
Microstructure and mechanical properties of Mg-8Li-xAl-0.5Ca alloys
复制标题
Mg-8Li-xAl-0.5Ca合金的显微组织和力学性能
DOI：
10.1080/02670836.2018.1533153
复制
发表时间：
2019
影响因子：
1.8
通讯作者：
Peng X D
中科院分区：
文献类型：
--
作者：
Xiong X M;Yang Y;Ma L N;Li M L;Ren F J;Hu J W;Wei G B;Peng X D
研究了Al含量对Mg-8Li-xAl-0.5Ca合金显微组织和力学性能的影响。结果表明，铸态Mg-8Li-0.5Ca合金主要由α-Mg、β-Li和颗粒状Mg 2Ca相组成。随着Al的加入，α-Mg相的数量先增加后减少。此外，金属间化合物也发生了明显的变化。由于在挤压过程中发生的动态再结晶，测试合金的微观结构被细化。挤压合金的机械性能比铸态合金的性能更令人满意。挤压态Mg-8Li-6Al-0.5Ca合金具有良好的综合力学性能，其抗拉强度为251.2MPa，屈服强度为220.6MPa，伸长率为23.5%。
The effect of the Al content on the microstructure and mechanical behaviour of Mg–8Li–xAl–0.5Ca alloys is investigated. The experimental results show that an as-cast Mg–8Li–0.5Ca alloy is mainly composed of α-Mg, β-Li and granular Mg2Ca phases. With the addition of Al, the amount of α-Mg phase first increases and then decreases. In addition, the intermetallic compounds also obviously change. The microstructure of the test alloys is refined due to dynamic recrystallisation that occurs during extrusion. The mechanical properties of extruded alloys are much more desirable than the properties of as-cast alloys. The as-extruded Mg–8Li–6Al–0.5Ca alloy exhibits good comprehensive mechanical properties with an ultimate tensile strength of 251.2 MPa, a yield strength of 220.6 MPa and an elongation of 23.5%.