Effects of atmosphere and Fe addition on suppression of environmental embrittlement in Co3Ti intermetallic compound.
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概要
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Behavior and suppression of environmental embrittlement in Co3Ti have been investigated by means of the small punch (SP) test, electrochemical measurements and tritium autoradiography. The environmental embrittlement in Co3Ti is the hydrogen embrittlement caused by the hydrogen generated from the humidity in air. The brittleness of Co3Ti is not the intrinsic nature but the extrinsic one arised from the environmental embrittlement. The environmental embrittlement can be suppressed when Co3Ti is in high vacuum or in dry air because there is free of moisture as a hydrogen source. The addition of Fe to Co3Ti is confirmed to be effective for the suppression of environmental embrittlement. The mechanism of the supression is to reduce a supply of hydrogen from the surface to the interior of Co3Ti due to the increase of hydrogen desorption rate resulting from the enhancement of hydrogen recombination.
- 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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