**About this Abstract** |

**Meeting** |
**2018 TMS Annual Meeting & Exhibition
** |

**Symposium
** |
**Hume-Rothery Award Symposium: Computational Thermodynamics and Its Implications to Kinetics, Properties, and Materials Design
** |

**Presentation Title** |
Strengthening Mg by Self-dispersed Nano-lamellar Faults |

**Author(s)** |
William Yi Wang, Shun-Li Shang, Yi Wang, Kristopher A. Darling, Bin Tang, Hongchao Kou, Xi-Dong Hui, Suveen N. Mathaudhu, Laszlo J. Keckes, Jinshan Li, Zi-Kui Liu |

**On-Site Speaker (Planned)** |
William Yi Wang |

**Abstract Scope** |
Here we present a novel strategy to strengthen Mg alloys through modifying the matrix by planar faults and optimization of the local lattice strain by alloying elements (X's), leading to non-incremental property advancements in Mg alloys. A comprehensive study regarding effects of alloying elements on the stacking fault (SF) energy, shear modulus, ideal shear stress, and bond strength has been performed, providing insights into the impact of X on the partial dislocation width in Mg. The anomalous shifts of the local phonon density of state of SFs and long periodic stacking ordered structures (LPSOs) toward the high frequency mode are revealed by the local HCP-FCC transformation, resulting in the increase of vibrational entropy and the decrease of Gibbs energy to stabilize the SFs and LPSOs. An integrating bonding charge density, electronic density of states, and electronic redistributions is applied to reveal the electronic basis for the “strengthening” of Mg alloys. |

**Proceedings Inclusion?** |
Planned: Supplemental Proceedings volume |