کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9796696 | 1514951 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dissociated dislocations in Ni: a computational study
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Dissociated dislocations in Ni: a computational study Dissociated dislocations in Ni: a computational study](/preview/png/9796696.png)
چکیده انگلیسی
A systematic computational study of the behavior of a (1/2)ã110ã dissociated screw dislocation in fcc nickel is presented, in which atomic interactions are described through an embedded-atom potential. A suitable external stress is applied on the system, both for modifying the equilibrium separation distance d and moving the dislocation complex. The structure of the dislocation and its corresponding changes during the motion are studied in the framework of the two-dimensional Peierls model, for different values of the ratio d/aâ², where aâ² is the period of the Peierls potential. The distance between the edge and screw components of the partials, as well as their widths, undergo a modulation with period aâ², as the dislocation moves, and the amplitudes of such oscillations are shown to depend on d/aâ². The stress profile acting on the dislocation complex is analyzed and the effective Peierls stress is estimated for different values of d/aâ².
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 390, Issues 1â2, 15 January 2005, Pages 393-399
Journal: Materials Science and Engineering: A - Volume 390, Issues 1â2, 15 January 2005, Pages 393-399
نویسندگان
P. Szelestey, M. Patriarca, K. Kaski,