کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1562788 999597 2010 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pinning effect of spheroid second-phase particles on grain growth studied by three-dimensional phase-field simulations
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Pinning effect of spheroid second-phase particles on grain growth studied by three-dimensional phase-field simulations
چکیده انگلیسی
For the first time, the pinning effect of small spheroid particles with aspect ratios 1, 2 and 3 on grain growth in polycrystalline structures was studied by three-dimensional phase-field simulations. This was possible by using an efficient parallel sparse bounding box algorithm. Simulation results for different volume fractions of the second-phase particles show that distributions of particles with higher aspect ratios have a stronger pinning effect, since grain boundaries have the tendency to align with the largest cross-section of the particles. The number of particles at triple, quadruple or higher order junctions increases with volume fraction, and with aspect ratio. Nevertheless, the final grain size has a volume fraction dependence of the form 1/fV0.93, following theoretical predictions assuming random intersections between grain boundaries and particles. A generalised Zener relation with a prefactor depending on the aspect ratio is proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 49, Issue 2, August 2010, Pages 340-350
نویسندگان
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