Study on causes of hydrogen inclusion in aluminium using deuterium as tracer
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概要
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As hydrogen included in aluminium has long been considered to have substancial influence on the defect of aluminium; as for pin holes in castings or blisters in sheets, many studies have been carried out and several proposals to find out the route throuth which hydrogen comes into aluminium have been made. No exact confirmation, however, has been done because there has been no reliable way to trace the behaviour of hydrogen directly.The authors method, as described in this report, is to use deuterium as a tracer and slightly enriched water, containing less than 1 atomic percent deuterium was used to give moisture. The vacuum-extracted gas from the ingot thus prepared was analized by mass spectrometer and the ratio D/H was compared with that in natural water (0.0147±0.0001 atomic percent). The results of the experiments on commercial pure aluminium and aluminium -7% magnesium alloy castings under six conditions of hydrogen introduction have been reported here, as summarized in Table 1. It is not sufficiently quantitative yet, but certain qualitative comparisons can be made among the several routes considered, which will serve as an aid to the foundry practice of aluminium.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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