Journal
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
Volume 32, Issue 3, Pages 611-618Publisher
JOURNAL WUHAN UNIV TECHNOLOGY
DOI: 10.1007/s11595-017-1642-6
Keywords
Al-3.0 wt%Mg alloy; Ce and La additions; microstructure; mechanical property; electrical resistivity
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Funding
- National Natural Science Foundation of China [51379070]
- Fundamental Research Funds for the Central Universities [2017B40314]
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The influences of rare earth elements (cerium and lanthanum) on the microstructure and phases of Al-3.0 wt%Mg alloys used for electromagnetic shielding wire were characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS). X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The mechanical properties and electrical resistivity were also investigated. The results indicated that a certain content of rare earth could improve the purification of the aluminum molten, enhance the strength, and reduce the electrical resistivity of Al-3.0 wt%Mg alloys. The strength reached the top value when RE content was 0.3 wt%, while the alloy with 0.2 wt% RE addition had the smallest electrical resistivity. The elongation varied little when RE addition was no more than 0.2 wt%. But the excessive addition of rare earth would be harmful to the microstructure and properties of Al-3.0 wt%Mg alloys.
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