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Collaborations Dr. Orlando Rios, Oak Ridge National Laboratory

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Collaborations Dr. Orlando Rios, Oak Ridge National Laboratory

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  1. Overview The goal of this CAREER research program is to understand the role of nanoparticles in modifying the deformation behavior of magnesium (Mg) alloys. The central hypothesis is that the presence of nanoparticles in the alloy not only affects grain size, and hence its grain refining capability, but also enhances plastic deformation mechanisms. It is through this fundamental understanding of deformation mechanisms in the presence of nano-sized particles in Mg alloys that deeper insight can be gained into other alloy systems with similar anisotropic crystal structures. Methodology A series of dysprosia Dy2O3nano-spheres and nano-rods were added to Mg using a technique called Electromagnetic Acoustical Transmission (EMAT). This technique couples induction heating with a high magnetic field to produce a high intensity ultrasonic signal. This signal produces a fine dispersion of nano-size particles throughout the microstructure. This unique microstructure is currently being studied for its effect on the ductility and formability of Mg. High Density Dispersed Dy2O3Nano-rods in Magnesium 200 nm Dy2O3 High Angle Annular Dark Field Image Dispersed Dy2O3Nano-spheres in Magnesium Presentations Bryan, Z.L, Chen, P., Henderson, H., Rios, O., Ludtka, G., Manuel, M.V. “Dispersion of Nanoparticles in Magnesium using Contactless Electromagnetic Acoustic Transmission (EMAT) under High Magnetic Fields.”2011 TMS Annual Meeting. Feb. 2011. 20 nm Collaborations Dr. Orlando Rios, Oak Ridge National Laboratory Dr. Gerard Ludtka, Oak Ridge National Laboratory Dr. Peter Sarosi, General Motors Dr. Paul Krajewski, General Motors Dr. Anil Sachdev, General Motors Bright Field Image

  2. Students Teaching Ph.D Students Design Class 2010 Zachary Bryan Hunter Henderson Goals: Increase “Materials-Centric” Design Content Into the Curriculum Masters Students Peiru Chen • Outcomes & Results: • 71 undergraduate students have participated since inception in 2009 • Submission in to 3 National Design and 1 National Paper Competitions • 3rd Place in 2010 ASM Undergraduate Design Competition(a first for the University of Florida) Undergraduate Students Hunter Henderson - Summer 2009 Service Awards • Minimum 6x/year lab open to high school and freshman students for a beginners foundry lesson • Active in NSF SEAGEP • Zachary Bryan awarded 2010 NSF GRFP Fellowship • Zachary Bryan awarded 2010 DOE Office of Science Graduate Fellowship • Hunter Henderson awarded 2009 College of Engineering Graduate Fellowship • Undergraduate design students awarded 3rd Place in 2010 ASM Undergraduate Design Competition (a first for the University of Florida)

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