کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5450329 | 1512862 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of twist angle on crack propagation of nanoscale bicrystal nickel film based on molecular dynamics simulation
ترجمه فارسی عنوان
تأثیر زاویه پیچشی بر انتشار ترک نیکل بر اساس شبیه سازی دینامیک مولکولی
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کلمات کلیدی
دینامیک مولکولی، مرز دانه، انتشار کراک، بیسیستال، جابجایی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
Tensile deformation of nanoscale bicrystal nickel film with twist grain boundary, which includes various twist angles, is investigated via molecular dynamics simulation to obtain the influence of twist angle on crack propagation. The twist angle has a significant influence on crack propagation. At the tensile strain of 0.667, as for the twist angles of 0°, 3.54° and 7.05°, the bicrystal nickel films are subjected to complete fracture, while as for the twist angles of 16.1° and 33.96°, no complete fracture occurs in the bicrystal nickel films. When the twist angles are 16.1° and 33.96°, the dislocations emitted from the crack tip are almost unable to go across the grain boundary and enter into the other grain along the slip planes {111}. There should appear a critical twist angle above which the crack propagation is suppressed at the grain boundary. The higher energy in the grain boundary with larger twist angle contributes to facilitating the movement of the glissile dislocation along the grain boundary rather than across the grain boundary, which leads to the propagation of the crack along the grain boundary.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 87, March 2017, Pages 281-294
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 87, March 2017, Pages 281-294
نویسندگان
Yanqiu Zhang, Shuyong Jiang, Xiaoming Zhu, Yanan Zhao,