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     COLLOQUIUM OF THE COMPUTATIONAL MATERIALS SCIENCE CENTER
AND THE SCHOOL OF PHYSICS, ASTRONOMY, & COMPUTATIONAL SCIENCES
                            (CSI 898-Sec 001)
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Computer simulation studies of deformation mechanisms and ductility in
                          nanocrystalline FCC materials

                             Diana Farkas
Materials Science and Engineering, Virginia Tech, Blacksburg, VA

Molecular dynamics computer simulation techniques were used to conduct
virtual tensile tests in samples containing random tilt grain boundaries and
an average grain size of 40nm. The mechanisms of plastic deformation
resulting from the tensile straining were analyzed in detail. We utilized
empirical interatomic potentials to analyze fracture propagation and the
critical role of the sample geometry and microstructure in determining overall
mechanical response. The effect of H impurities segregated to grain
boundaries is also studied. 

                       Monday, April 9, 2012
                               4:30 pm
                    Room 301, Research Hall, Fairfax Campus

Refreshments will be served at 4:15 PM.
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Find the schedule at http://www.cmasc.gmu.edu/seminar/schedule.html