書誌事項
- タイトル別名
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- Effect of Hydrogen Pressure and Test Frequency on Fatigue Crack Growth of a Ferrite-Pearlite Steel in Hydrogen Gas
- スイソ ガス チュウ ニ オケル フェライト パーライト コウ ノ ヒロウ キレツ シンテン トクセイ ニ オヨボス スイソ アツリョク ト シケン シュウハスウ ノ エイキョウ
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Fatigue crack growth behaviour of a ferrite-pearlite steel SM490B has been investigated in hydrogen gas and air. In order to investigate the effects of hydrogen pressure and test frequency on fatigue crack growth, fatigue crack growth tests were carried out under the conditions of hydrogen pressures p=0.1, 0.4, 0.7MPa (absolute pressure) and test frequencies f=0.1, 1, 5Hz. Fatigue crack growth was accelerated in hydrogen gas under all the conditions with the combination of the test frequency and hydrogen pressure. Fatigue crack growth rates in hydrogen gas were about 30 times higher than those in air. There existed the upper limit of the acceleration of fatigue crack growth at 30 times at frequency below 1Hz in hydrogen gas. The striations formed in hydrogen gas were flat and unclear, compared to the striations in air. Hydrogen that enters the material in hydrogen gas is external hydrogen. On the other hand, hydrogen that exists in the hydrogen-charged material is internal hydrogen. The difference in the fatigue crack growth acceleration between external hydrogen and internal hydrogen for the ferrite-pearlite steel was discussed in comparison between the results of SM490B steel in hydrogen gas and the results of hydrogen-charged specimens of ferrite-pearlite-steel SGP in the previous study. The highest test frequency to obtain the upper limit of crack growth rate acceleration for SM490B in hydrogen gas was 1Hz. On the other hand, the highest frequency to obtain the upper limit for the hydrogen charged steel SGP was 0.01Hz. Accordingly, there was the difference in the hydrogen supply mechanism to the crack tip between external hydrogen and internal hydrogen.
収録刊行物
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- 日本機械学会論文集Ａ編
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日本機械学会論文集Ａ編 76 (767), 908-917, 2010
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001204478802304
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- NII論文ID
- 110007685192
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- NII書誌ID
- AN0018742X
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- ISSN
- 18848338
- 03875008
- http://id.crossref.org/issn/03875008
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- NDL書誌ID
- 10784072
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可