کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5145842 | 1497377 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental verification of the hydrogen concentration around a crack tip using spot X-ray diffraction
ترجمه فارسی عنوان
بررسی تجربی غلظت هیدروژن در اطراف نوک کرک با استفاده از پراش اشعه ایکس نقطه
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کلمات کلیدی
هراس هیدروژن، غلظت هیدروژن، ترک، فاکتور شدت تنش پراش اشعه ایکس،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
We employed X-ray diffraction using collimated X-rays to quantitatively evaluate the local hydrogen concentration behavior in metals. Hydrogen concentrating around a crack tip significantly accelerates crack propagation, i.e., hydrogen embrittlement. In order to clarify the mechanism leading to this, the local hydrogen concentration behavior, i.e., at a crack tip, was evaluated by numerical analysis and experimental measurements. Although thermal desorption analysis can be used to evaluate the total hydrogen content in metals, it cannot be applied to local areas. Microprint methods, which use chemical reactions between hydrogen and coated elements cannot quantitatively evaluate the hydrogen content. The present study takes account of hydrogen-induced strain, and X-ray diffraction in a confined area was employed to detect variations in lattice spacing before and after hydrogen charging. Using X-ray diffraction applied to a small area, we demonstrate that the hydrogen concentrates in the vicinity of the crack, i.e., at the elastic-plastic boundary.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 48, 28 December 2016, Pages 23188-23195
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 48, 28 December 2016, Pages 23188-23195
نویسندگان
O. Takakuwa, T. Fujisawa, H. Soyama,