Hydrogen trapping in an Al-2.1 wt % Li alloy |
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| Authors: | Y. Iijima S. Yoshida H. Saitoh |
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| Affiliation: | (1) Department of Materials Science, Faculty of Engineering, Tohoku University, Aoba, 980 Sendai, Japan;(2) Present address: Seiko Instruments Inc., Takatsu-Shinden, 271 Matsudo, Japan;(3) Present address: Materials Science and Engineering, Muroran Institute of Technology, 050 Muroran, Japan |
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| Abstract: | Hydrogen trapping in an Al-2.1 wt % Li alloy aged up to typical stages in the age-hardening curve, has been studied by measuring the tritium release rate after charging. The distribution of hydrogen in the aged alloy has been studied by tritium electron microautoradiography. It has been found that the coherent   precipitate and the incoherent precipitate act as a trapping site for hydrogen, while the semi-coherent precipitate does not trap hydrogen. A dislocation has been found to be capable of trapping hydrogen, while hydrogen trapping by the grain boundary has not been observed. |
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