کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
784008 | 1465049 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Atomistic study of the effect of hydrogen on dislocation emission from a mode II crack tip in alpha iron
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Experimental and analytical studies have shown that the presence of hydrogen enhances dislocation emission. However, the effect of hydrogen on dislocation emission is not well understood. In this study, we investigated the effect of hydrogen on dislocation emission from a mode II crack in alpha iron using an atomistic model. We found that hydrogen decreases the stacking fault energy of alpha iron, resulting in an enhancement of dislocation emission. It is clarified that hydrogen atoms existing within a few angstroms of the crack tip only enhance the dislocation emission. We also confirmed that dislocation emission enhancement can occur at realistic hydrogen concentrations of hydrogen gaseous condition under thermal equilibrium conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mechanical Sciences - Volume 52, Issue 2, February 2010, Pages 334–338
Journal: International Journal of Mechanical Sciences - Volume 52, Issue 2, February 2010, Pages 334–338
نویسندگان
Shinya Taketomi, Ryosuke Matsumoto, Noriyuki Miyazaki,