|About this Abstract
||Materials Science & Technology 2012
||Phase Stability, Diffusion, Kinetics and their Applications (PSDK-VII)
||Diffusion Studies in Mg-Al-Zn
||R. Warmack, Nagraj Kulkarni, B. Radhakrishnan, J. Tuggle, J. Hunter, C. Kammerer, Y. Sohn, E. Dein, K. Coffey, G. Murch, I. Belova
|On-Site Speaker (Planned)
Our collaboration is directed toward the determination of fundamental diffusion properties in Mg and its alloys for database incorporation in the Integrated Computational Materials Engineering (ICME) program. Tracer diffusion as a function of composition and temperature is being quantified by applying isotopically enriched films of Mg-25 and Zn-68 to preannealed, large-grained bulk Mg alloys. Samples are annealed and depth profiled using secondary-ion mass spectrometry (SIMS) for analysis. The results with Mg-25 have extended historic radiotracer self-diffusion measurements of Mg to lower temperatures, and have shown the effects of Al and Zn on diffusion in Mg-alloys. The combination of Mg and Zn tracer data with interdiffusion data yields Al tracer diffusion coefficients. Work on grain boundary diffusion will also be presented.This research is sponsored by the U.S. Department of Energy, Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies, as part of the Lightweight Materials Program.