کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1450471 | 988735 | 2008 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mesoscale simulation of the configuration-dependent shock-compression response of Ni + Al powder mixtures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Mesoscale simulations of the shock-compression response of nickel and aluminum powder mixtures have been performed to investigate the influence of particle configuration (size, shape and distribution) on the micromechanical processes of deformation, mass flow and mixing. Real microstructures were constructed from scanning electron microscopy montages of the starting mixtures pre-pressed at various densities [Eakins D, Thadhani NN, J Appl Phys, 2007;101:043508]. The travel of the high-pressure disturbance was used to determine the equation-of-state of the mixture material, and compared to the results of real-time experiments for validation. Observations of particle-level processes were used to formulate an understanding of the wide range of macroscopic behaviors exhibited as a function of particle morphology and distribution, porosity, and dissimilarities in properties of the two constituents. The results reveal the effects of particle heterogeneity on the physical, chemical and micromechanical response of shock-compressed Ni + Al powder mixtures, and their role in the initiation of shock-induced chemical reactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 7, April 2008, Pages 1496-1510
Journal: Acta Materialia - Volume 56, Issue 7, April 2008, Pages 1496-1510
نویسندگان
D.E. Eakins, N.N. Thadhani,