期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 29, 期 12, 页码 2506-2513出版社
ELSEVIER
DOI: 10.1016/S1003-6326(19)65158-7
关键词
Mg-Li alloy; Al-Si eutectic; second phase; tensile strength; elongation
资金
- National Natural Science Foundation of China [51971040, 51701029, 51671041, 51531002]
- National Key Research and Development Program of China [2016YFB0301100]
- China Postdoctoral Science Foundation [2018T110943, 2017M620410]
- Chongqing Postdoctoral Scientific Research Foundation, China [Xm2017010]
- Fundamental Research Funds for the Central Universities, China [2018CDGFCL005]
Mg-4Li-3(Al-Si), Mg-8Li-3(Al-Si) and Mg-12Li-3(Al-Si) alloys based on the alpha-Mg, alpha-Mg+beta-Li, beta-Li phases, respectively, were produced to investigate the effect of alloying with Al-Si eutectic on the microstructure and mechanical properties of the three alloys. Alloying with the Al-Si eutectic of Mg-xLi (x=4, 8 and 12 wt.%) alloys caused the formation of different types of Al-Li precipitates: Al3Li, AlLi and Li3Al2, respectively. Also, considerable quantities of Mg2Si phase particles were found in the three alloys. The results of tensile tests showed that the Mg-4Li-3(Al-Si) alloy exhibited the highest ultimate tensile strength (UTS) of 249 MPa but the lowest elongation of 6.3%. The Mg-12Li-3(Al-Si) alloy had the highest elongation of 26% but the lowest UTS of 173 MPa. The different mechanical properties were attributed to the different crystal structures of the three alloys and the precipitate with different type, morphology and distribution.
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