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Compressive properties and energy absorption behavior of Mg17Al12/Al ordered structure composites
Composites Part B: Engineering ( IF 12.7 ) Pub Date : 2021-02-04 , DOI: 10.1016/j.compositesb.2021.108688
Han Wang , Mingming Su , Hai Hao

In this study, Mg17Al12/Al ordered structure composites were prepared by infiltrating the ordered porous aluminum with the intermetallic compound Mg17Al12 under gravity condition. Their compressive properties and energy absorption behavior were investigated by quasi-static compression tests. The results showed that Mg17Al12/Al ordered structure composites exhibited distinctly different compressive stress-strain curves with a prominent linear elastic stage and had an advantage over ordered porous aluminum and Mg17Al12/Al composites with irregular structures on mechanical properties. Moreover, Mg17Al12/Al composites with strengthened truss structure showed better compressive properties than Mg17Al12/Al composites with basic truss structure. The ordered porous aluminum that acted as matrix skeleton showed great plasticity and ductility while the intermetallic compound Mg17Al12 as filler exhibited high compressive strength and obvious brittleness. The improvement of mechanical properties of Mg17Al12/Al ordered structure composites was attributed to the ordered composite structure and the distinct mechanical property of co-continuous intermetallic compound Mg17Al12 and pure Al.



中文翻译:

Mg 17 Al 12 / Al有序结构复合材料的压缩性能和能量吸收行为

在这项研究中,通过在重力条件下用金属间化合物Mg 17 Al 12渗透有序多孔铝来制备Mg 17 Al 12 / Al有序结构复合材料。通过准静态压缩试验研究了它们的压缩性能和能量吸收行为。结果表明,Mg 17 Al 12 / Al有序结构复合材料表现出明显不同的压缩应力-应变曲线,具有显着的线性弹性阶段,并且在力学性能方面优于具有规则结构的有序多孔铝和Mg 17 Al 12 / Al复合材料。此外,Mg 17 Al12 / Al复合材料具有强化桁架结构显示出更好的压缩性能除Mg 17的Al 12 / Al复合材料具有基本桁架结构。用作基体骨架的有序多孔铝具有很好的可塑性和延展性,而金属间化合物Mg 17 Al 12作为填充剂则具有较高的抗压强度和明显的脆性。Mg 17 Al 12 / Al有序结构复合材料力学性能的提高归因于有序复合结构以及共连续金属间化合物Mg 17 Al 12和纯Al的独特力学性能。

更新日期:2021-02-04
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