Solute effect on strength and formability of Mg: A first-principle study

P. Garg, M. A. Bhatia, S. N. Mathaudhu, Kiran Solanki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

In wrought magnesium alloys, room temperature plasticity is largely controlled by limited slip systems such as basal slip and tension/compression twins. The insufficient number of active slip systems limits strength and ductility preventing broader structural applicability of Mg-alloys. Hence, we employ first-principle calculations to investigate the effects of Y and Al alloying elements on shearability and dislocation motion on various slip systems through ideal shear resistance and generalized stacking fault energy calculations. Yttrium is seen to lower the ideal shear resistance and dislocation motion energetics on all the slip systems. On the other hand, aluminum increases the ideal shear resistance but decreases the energy barrier for dislocation motion on various slip systems. The profound effects of solute addition result from the charge transfer between the solute atom and surrounding magnesium atoms.

Original languageEnglish (US)
Title of host publicationMagnesium Technology 2017
PublisherSpringer International Publishing
Pages483-489
Number of pages7
ISBN (Print)9783319523910
DOIs
StatePublished - Jan 1 2017
EventInternational Symposium on Magnesium Technology, 2017 - San Diego, United States
Duration: Feb 26 2017Mar 2 2017

Publication series

NameMinerals, Metals and Materials Series
VolumePart F8
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Other

OtherInternational Symposium on Magnesium Technology, 2017
CountryUnited States
CitySan Diego
Period2/26/173/2/17

Keywords

  • Aluminum
  • First principles
  • Ideal shear resistance
  • Magnesium
  • Yttrium

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry
  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Energy Engineering and Power Technology

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