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Generalized Stacking Fault Energy of {10-11}<11-23> Slip System in Mg-Based Binary Alloys: A First Principles Study

1
College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
2
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
3
National Engineering Research Center for Magnesium Alloys, Chongqing 400044, China
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(9), 1548; https://doi.org/10.3390/ma12091548
Received: 16 April 2019 / Revised: 6 May 2019 / Accepted: 8 May 2019 / Published: 11 May 2019
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Abstract

In this work, the generalized stacking fault energies (GSFEs) of {10-11}<11-23> slip system in a wide range of Mg-X (X = Ag, Al, Bi, Ca, Dy, Er, Gd, Ho, Li, Lu, Mn, Nd, Pb, Sc, Sm, Sn, Y, Yb, Zn and Zr) binary alloys has been studied. The doping concentration in the doping plane and the Mg-X system is 12.5 at.% and 1.79 at.%, respectively. Two slip modes (slip mode I and II) were considered. For pure magnesium, these two slip modes are equivalent to each other. However, substituting a solute atom into the magnesium matrix will cause different effects on these two slip modes. Based on the calculated GSFEs, two design maps were constructed to predict solute effects on the behavior of the {10-11}<11-23> dislocations. The design maps suggest that the addition of Ag, Al, Ca, Dy, Er, Gd, Ho, Lu, Nd, Sm, Y, Yb and Zn could facilitate the {10-11}<11-23> dislocations. View Full-Text
Keywords: magnesium alloys; first-principle calculation; stacking-fault energy; ductility magnesium alloys; first-principle calculation; stacking-fault energy; ductility
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Dou, Y.; Luo, H.; Zhang, J.; Tang, X. Generalized Stacking Fault Energy of {10-11}<11-23> Slip System in Mg-Based Binary Alloys: A First Principles Study. Materials 2019, 12, 1548.

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