کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448890 988686 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A computational analysis of the deformation mechanisms of a nanocrystal–metallic glass composite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
A computational analysis of the deformation mechanisms of a nanocrystal–metallic glass composite
چکیده انگلیسی

Simulations of a monatomic model amorphous matrix embedded with approximately 37% of a body-centered cubic phase demonstrate mechanisms by which nanocrystallites can alter the mechanical response of metallic glass. Three effects affect the resulting ductility: (i) the presence of weak amorphous–crystalline interfaces, (ii) the fraction of nanocrystallites oriented to prevent twinning relative to the loading stress, and (iii) the shear-induced growth and dissolution of the nanocrystallites when they are impinged by shear bands. While the first effect dominates in these simulations due to system size limitations, the third effect appears to be crucial for understanding the ductility of experimental samples. These simulations indicate that shear-induced growth of existing nanocrystallites, rather than nucleation of new crystalline regions, may account for the observed enhancement in ductility.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 5, March 2008, Pages 995–1000
نویسندگان
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