The hydriding–dehydriding characteristics of La0.6Y0.4Ni4.8Mn0.2 and their influences in the surface strain on small-scale, thin-wall and vertical containers
2008
Abstract The hydriding–dehydriding characteristics of La 0.6 Y 0.4 Ni 4.8 Mn 0.2 are studied, and the surface strain on small-scale, thin-wall and vertical containers is analyzed. According to the tests on 20–58.7 vol% schemes, prominent strain appears in both the hoop and the longitudinal directions. The surface strain increases with cycle numbers and packing fractions, while declines from the bottom to the top. The strain increments are linear with cycle numbers, and the absorption strain increments grow with atomic ratios. The alloy separates into agglomerated and loosened states after cycling. The optimal alloy packing scheme and hydrogen charge amount for the directly filled containers are proposed.
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