Energy investigations on the mechanical properties of magnesium alloyed by X = C, B, N, O and vacancy

Xiaozhi Wu, Lili Liu, Rui Wang, Liyong Gan, Qing Liu

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The generalized stacking fault (GSF) energies and surface energies of magnesium and its alloys with alloying atoms X = C, B, N, O and vacancy have been investigated using the first-principles methods. It is found that the predominant reducing effects of the alloying atoms and vacancy on the stacking fault energy are resulted from the position of them in the 1st layer near the slip plane. The stacking fault energies are nearly the same as the pure magnesium while the alloying atoms and vacancy are placed in the 2nd, 3rd, 4th, 5th and 6th layers. It has been shown that O strongly reduces the GSF energy of Mg. The alloying atoms C, B and N increase the surface energy, but O and vacancy reduce the surface energy of Mg. The ductilities of Mg and Mg alloys have been discussed based on the Rice criterion by using the ratio between surface energy and unstable stacking fault energy. © 2013 Higher Education Press and Springer-Verlag Berlin Heidelberg.
Original languageEnglish (US)
Pages (from-to)405-412
Number of pages8
JournalFrontiers of Materials Science
Volume7
Issue number4
DOIs
StatePublished - Oct 25 2013

ASJC Scopus subject areas

  • Materials Science(all)

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