کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1561108 | 1513934 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modeling effects of initial dislocation microstructure on the yield strength in FCC single crystal Cu with dislocation dynamics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Modeling effects of initial dislocation microstructure on the yield strength in FCC single crystal Cu with dislocation dynamics Modeling effects of initial dislocation microstructure on the yield strength in FCC single crystal Cu with dislocation dynamics](/preview/png/1561108.png)
چکیده انگلیسی
Three dimensional dislocation dynamics (3D-DD) method was used to study how initial dislocation microstructure, with varying dislocation density, length and distribution, affects the yield strength in face-centered cubic (FCC) single crystal Cu. Initial dislocations are generated for three average lengths for each one of the seven dislocation densities ranging from 0.1-5Â ÃÂ 1012Â m/m3.They are randomly distributed on slip planes. The uniaxial tension simulation results for two crystallographic loading orientations, [1Â 0Â 0] and [1Â 1Â 1], all show that the yield strength has a well-defined linear relationship with the average length of these dislocations, except for very low dislocation densities where small number of dislocations lead to a stochastic behavior. This indicates that dislocation-density based crystal plasticity formulations, including the square-root relationship between flow stress and dislocation density, only work when dislocation densities/numbers are sufficiently large so that a statistically accurate description of the microstructure can be obtainable.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 75, July 2013, Pages 79-85
Journal: Computational Materials Science - Volume 75, July 2013, Pages 79-85
نویسندگان
Ranga Nikhil Yellakara, Zhiqiang Wang,