Improving Strength and Electromagnetic Shielding Effectiveness of Mg–Sn–Zn–Ca–Ce Alloy by Sn Addition
Improving Strength and Electromagnetic Shielding Effectiveness of Mg–Sn–Zn–Ca–Ce Alloy by Sn Addition
复制标题
DOI：
10.1002/adem.202100166
复制
发表时间：
2021-05
影响因子：
3.6
通讯作者：
Junliu Ye;Xianhua Chen;Zhu Luo;Jianbo Li;Yuan Yuan-Yuan;Jun Tan;F. Pan
中科院分区：
文献类型：
--
作者：
Junliu Ye;Xianhua Chen;Zhu Luo;Jianbo Li;Yuan Yuan-Yuan;Jun Tan;F. Pan
强度和电磁屏蔽性能是对轻质金属屏蔽材料的两个基本要求。然而，开发具有高强度和良好电磁屏蔽能力的镁（Mg）合金仍然是一个挑战。在此，结果表明，在Mg-xSn-Zn-Ca-Ce合金中与Sn合金化同时提高强度和电磁屏蔽效能（SE）。Sn合金化后，合金的平均晶粒尺寸大大减小，但基体织构强度增强，促进了Mg 2Sn相的析出。Mg-3Sn-Zn-Ca-Ce合金在含Sn合金中获得了最佳的综合力学性能和电磁屏蔽性能（抗拉强度（UTS）为337 MPa，电磁屏蔽性能（SE）为91-114 dB）。强度的增加归因于晶粒细化、织构强化和沉淀强化的组合。大的电磁场效应主要是由于基面上规则排列的Mg_2Sn析出相所致。
The strength and electromagnetic shielding capability are two essential requirements for lightweight metallic materials as shielding materials. However, it is still a challenge to develop magnesium (Mg) alloys with both high strength and favorable electromagnetic shielding capability. Herein, the results show that alloying with Sn in Mg–xSn–Zn–Ca–Ce alloys simultaneously increases both strength and electromagnetic shielding effectiveness (SE). After Sn alloying, the average grain size of the alloys is greatly reduced, whereas the intensity of basal texture is enhanced, and the precipitation of Mg2Sn phase is promoted. The Mg–3Sn–Zn–Ca–Ce alloy attains best comprehensive mechanical properties and electromagnetic SE (ultimate tensile strength (UTS) of 337 MPa and SE of 91–114 dB) in Sn containing alloys. The increase in strength is attributed to the combination of grain refinement, texture strengthening, and precipitation strengthening. The great electromagnetic SE is mainly due to the regularly arranged Mg2Sn precipitates in the basal plane.