|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Hume-Rothery Symposium: Accelerated Measurements and Predictions of Thermodynamics and Kinetics for Materials Design and Discovery
||Insights from a Comprehensive Assessment of Diffusion Coefficients of 20 Binary Systems and a Comprehensive Diffusion Mobility Database for Magnesium Alloys
||Wei Zhong, Qiaofu Zhang, Ji-Cheng Zhao
|On-Site Speaker (Planned)
A systematic assessment was performed on the diffusion coefficients and atomic mobilities of 20 binary systems that form complete solid solutions. The insights from this comprehensive assessment include: (1) reliable self-diffusion and impurity (dilute) diffusion coefficients are essential for accurate mobility assessments; (2) both intrinsic and tracer diffusion coefficients can be reliably evaluated from interdiffusion coefficients when reliable self-diffusion and impurity diffusion coefficients are available; and (3) only one parameter is necessary for each binary system to avoid over-fitting. A systematic assessment of both the measured and computed diffusion data in hcp Mg was performed using a holistic approach to yield the most comprehensive Mg mobility database to date, comprising 23 elements. This reliable mobility database will contribute to future development of advanced Mg alloys. The holistic approach developed in this study will also be very beneficial to the future establishment of reliable mobility databases for other alloy systems.
||ICME, Computational Materials Science & Engineering, Magnesium