Download or read book Measurement of Diffusion Coefficients of Nine Elements in Magnesium and Establishment of a Comprehensive Mobility Database for Lightweight Magnesium Alloys written by Wei Zhong (Ph. D. in materials science) and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffusion coefficients are essential data to understand and predict materials processes such as solidification and precipitations as well as materials properties such as creep resistance. There are, however, very limited data available in the literature for experimentally measured diffusion coefficients of key alloying elements in magnesium. This worldwide shortage of reliable diffusion coefficients in Mg systems is hindering the computational design of high-performance Mg alloys using the Integrated Computational Materials Engineering (ICME) tools. The high-throughput diffusion multiples and novel liquid-solid diffusion couples were employed to collect a large number of diffusion profiles using electron probe micro-analysis (EPMA) between Mg and nine key alloying elements Al, Ca, Ce, Gd, Li, Mn, Sn, Y and Zn. A large amount of diffusion coefficients of these elements in Mg was obtained by performing a forward-simulation analysis on the composition profiles. Together with the critically evaluated experimental data collected in the literature, a comprehensive and reliable mobility database for Mg-based systems was established. These experimentally measured diffusion coefficients coupled with thermodynamic databases as well as first-principles calculations are used to develop the most comprehensive and reliable mobility database for CALPHAD modeling of processes and properties of Mg alloys. This mobility database will contribute to accelerated development of next-generation Mg alloys for vehicle lightweighting and other applications.