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Effect of Geometrical Shape and Cold Work on Deformation of the Hydrogen Absorption Metal with Hydrogen Absorption-Desorption Cycling  

Jeong, Y.G. (School of Mechanical Eng., Kumoh National University of Technology)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.14, no.3, 2003 , pp. 207-216 More about this Journal
Abstract
By using the electrochemical method, the relation between the deformation and the geometrical shape, and the effect of cold work on hydrogen absorption-desorption cycling in palladium were investigated, In order to study this problem, four kinds of the Pd specimens used were plates and bars as cold worked and annealed states. As results, it is found that the deformation of thickness direction in the palladium plates increased whereas other lateral directions decreased. But the palladium bars showed the same deformation ratio in all directions because of uniform distribution of the $\beta$ phase. Grains in the plate specimens were greatly deformed after hydrogenation cycling whereas grains in the bar specimens were pulverized. Also, deterioration of the hydrogen absorption rate of the bar specimen was larger than the plate specimen. And the effect of cold work on hydrogen absorption capacity was relatively small.
Keywords
Hydrogen absorption; Palladium; Deformation ratio; Hydrogenation;
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