کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1624282 1516421 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Physical properties of hydrogen in TiVMnCr bcc alloys as deduced from hydrogen absorption/desorption and mechanical spectroscopy experiments
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Physical properties of hydrogen in TiVMnCr bcc alloys as deduced from hydrogen absorption/desorption and mechanical spectroscopy experiments
چکیده انگلیسی
The hydrogen absorption/desorption properties of the Ti40VxMn(50−x)Cr10 alloys (x = 32 and 36) have been investigated between 78 and 201 °C. The partial molar enthalpy ΔH of the di-hydride formation has been found to be −52 ± 7 kJ/mol and the desorption plateau pressure turned out to be rather low (≤ 2 bar) even at a temperature as high as 183 °C. Internal friction and Young's modulus measurements between the ambient and liquid nitrogen temperatures revealed the existence of the H-Snoek effect, whose relaxation strength and width at half peak height were found to increase not linearly with hydrogen content. This behaviour is due to the occupancy by hydrogen of different types of tetrahedral interstitial sites. The experimental results suggest that the various transformation sequences observed on hydrogen charging in these bcc solid solution alloys is primarily determined by hydrogen-hydrogen repulsive interactions. A qualitative model is proposed to account for these transformation sequences.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 456, Issues 1–2, 29 May 2008, Pages 118-124
نویسندگان
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