**About this Abstract** |

**Meeting** |
**2017 TMS Annual Meeting & Exhibition
** |

**Symposium
** |
**High Entropy Alloys V
** |

**Presentation Title** |
Application of a High Accuracy Diffusion Kinetics Formalism to High Entropy Alloys |

**Author(s)** |
Alan R Allnatt, Irina Belova, Tumpa Rani Paul, Graeme E. Murch |

**On-Site Speaker (Planned)** |
Irina Belova |

**Abstract Scope** |
In this paper, a new, lighter, version of the highly accurate Moleko, Allnatt and Allnatt formalism for describing both tracer (self) and collective diffusion kinetics in multicomponent random alloys is presented. Verification of the resulting expressions is performed by means of kinetic Monte Carlo simulation. Using this formalism the possible ranges of the self diffusion coefficient ratio of the highest to the lowest atomic component are examined for equiatomic (or near equiatomic) binary, ternary, quaternary and quinary alloys. Results show that kinetics arguments involving jump reversals alone are not enough to explain the sluggish diffusion observed of all atomic components in (equiatomic) high entropy alloys. |

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