Effect of Nd on the microstructure and corrosion behaviour of Mg-9Li-3Al magnesium alloy in 3.5 wt.% NaCl solution

被引：8
作者：
Dinesh, P. [1 ]
Manivannan, S. [2 ]
Babu, S. P. Kumaresh [1 ]
Natarajan, S. [1 ]
机构：
[1] Natl Inst Technol, Dept Met & Mat Engn, Tiruchirappalli, Tamil Nadu, India
[2] Karpagam Acad Higher Educ, Dept Mech Engn, Coimbatore, Tamil Nadu, India
来源：
MATERIALS TODAY-PROCEEDINGS | 2019年 / 15卷
关键词：
rare earth; corrosion behavior; polarization; MECHANICAL-PROPERTIES; MG-LI;
D O I：
10.1016/j.matpr.2019.05.034
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
As-cast Mg-9Li-3Al-xNd (x = 0-2.0 wt.%, with the variation of 0.5wt.%) magnesium alloys were prepared through casting in electrical induction melting furnace under a controlled inert gas atmosphere. Influences of Nd over the metallography changes and corrosion characteristics of Mg-9Li-3Al alloys have been examined by following techniques are OM, XRD, SEM and potentio-dynamic polarization (PDP) test. The results illustrate that adding Nd modifies the continuous beta-Li phases into discontinuous phase by the formation of new precipitates such as Al2Nd and Al11Nd3. Meanwhile, the grain sizes of Mg-9Li-3Al-xNd alloys reduced with respect to the increasing Nd content. PDP results disclose that the Nd addition reduces the corrosion current density (i(corr)) of Mg-9Li-3Al alloys which can be essentially produced by grain refinement. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：126 / 131
页数：6
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