期刊
JOURNAL OF MAGNESIUM AND ALLOYS
卷 9, 期 4, 页码 1339-1348出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2019.08.004
关键词
Mg-Li alloy; Al-Si eutectic; Microstructure; Grain orientation; Corrosion
资金
- National Natural Science Foundation of China [51701029, 51671041, 51531002]
- National Key Research and Development Program of China [2016YFB0301100]
- China Postdoctoral Science Foundation [2018T110943, 2017M620410]
- Chongqing Postdoctoral Scientific Research Foundation [Xm2017010]
- Fundamental Research Funds for the Central Universities [2018CDGFCL005]
The influence of alloying with Al-Si eutectic on the microstructure and corrosion resistance of single-phase Mg-4Li was studied. Al-Si eutectic caused the formation of Mg2Si and Mg-Al phase, leading to changes in grain orientation and decreased corrosion resistance due to galvanic corrosion from the precipitates and texture change.
The influence of alloying with Al-Si eutectic on the microstructure and corrosion resistance of single-phase Mg-4Li was studied in this paper. The microstructure was characterized using an electron microscopy. The corrosion properties were measured by immersion tests and electrochemical impedance spectrum (EIS) measurements. Alloying with Al-Si eutectic caused the formation of Mg2Si and Mg-Al phase. The grain orientation of Mg-4Li was mainly composed of (0001) while the grain orientation of Mg-4Li-6(Al-Si) was mainly consisted of (10-10) and (11-20). Mg-4Li-6(Al-Si) shows worse corrosion resistance than Mg-4Li owing to the galvanic corrosion from the precipitates and texture change. (C) 2020 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.
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