Simultaneously improved mechanical strength and corrosion resistance of Mg-Li-Al alloy by solid solution treatment
Simultaneously improved mechanical strength and corrosion resistance of Mg-Li-Al alloy by solid solution treatment
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固溶处理同时提高Mg-Li-Al合金的机械强度和耐腐蚀性能
DOI：
10.1016/j.matlet.2021.130305
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发表时间：
2021-06-25
影响因子：
3
通讯作者：
Zhang, Z. R.
中科院分区：
文献类型：
--
作者：
Li, C. Q.;Liu, X.;Zhang, Z. R.
研究了铸态Mg-10.1 wt% Li-4.8 wt% Al合金经350 ℃固溶处理4 h（T4）后的力学性能和耐腐蚀性能。在室温下，T4 样品的铸态极限拉伸强度 (127 MPa) 提高到 250 MPa。 T4样品的耐腐蚀性能也同时得到提高，这主要归功于微电偶的缺失和表面保护膜的共同作用。局部电位分布证实阳极β-Li和阴极α-Mg之间的微电偶效应加速了铸态合金的腐蚀。
The mechanical property and corrosion resistance of as-cast Mg-10.1 wt% Li-4.8 wt% Al alloy subjected to solid solution treatment of 350 degrees C for 4 h (T4) were investigated. At room temperature, the ultimate tensile strength (127 MPa) of the as-cast sample was elevated to 250 MPa for the T4 sample. The corrosion resistance of T4 sample was also improved simultaneously, which was mainly ascribed to the combined effect of the absence of micro-galvanic couples and the protective surface film on the surface. The localized potential distribution confirmed that the micro-galvanic effect between anodic beta-Li and cathodic alpha-Mg accelerated the corrosion of ascast alloy.