4.7 Article

A simultaneous increase of elastic modulus and ductility by Al and Li additions in Mg-Gd , Zn-Zr-Ag alloy

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2019.138576

Keywords

Magnesium alloy; Elastic modulus; Ductility; Al2Li3 phase; Al2Gd phase

Funding

  1. National Key R&D Program of China [2016YFB0301100]
  2. National Natural Science Foundation of China [51571043]
  3. Fundamental Research Funds for the Central Universities [2018CDJDCL0019, cqu2018CDHB1A08, 2018CDGFCL0005]

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This short communication presents a new Mg-12Gd-1Zn-0.5Zr-0.5Ag--6Al-5Li (wt.%) alloy with high elastic modulus of 52.0 GPa and excellent ductility of 22.5%. The high modulus of alloy is due to the formation of high modulus Al2Li3 and Al2Gd phases, and its excellent ductility can be attributed to refined grains, decreased c/a ratio and initiation of non-basal slips.

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