Absorption of Hydrogen in High-strength Low -alloy Steel during Tensile Deformation in Gaseous Hydrogen
スポンサーリンク
概要
- 論文の詳細を見る
Absorption of hydrogen in a high-strength nickel–chromium–molybdenum steel during tensile deformation in 0.5 MPa gaseous hydrogen was examined using a thermal desorption analysis method. The tensile strength of the specimen was varied in the range from 1214 to 947 MPa by heat treatment. The dislocation density of the specimens was measured by X-ray diffractometry after tensile testing in a hydrogen atmosphere. The hydrogen content absorbed during tensile deformation increased with increasing tensile strain in proportional elastic range until just before yielding. The yield stress was defined as 0.2% proof stress in this work. At the same tensile strains, the hydrogen content of lower-strength specimens was larger than that of higher-strength specimens. The dislocation density gradually decreased until just before yielding, corresponding to the proportional increase of hydrogen content to the tensile strain. This implies that the hydrogen absorption behavior during tensile deformation in gaseous hydrogen is related to the motion of mobile dislocations initially contained in the specimens. The activation energy for desorption of hydrogen absorbed during tensile deformation did not depend on the strength of the steel. This indicates that the trap sites of hydrogen atoms created through the tensile deformation were the same regardless of the strength levels.
- 社団法人 日本鉄鋼協会の論文
- 2010-10-15
著者
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WADA Yoru
Muroran Research Laboratory, The Japan Steel Works, Ltd.
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Wada Yoru
Muroran Research Laboratory The Japan Steel Works Ltd
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Wada Yoru
Muroran Research Laboratory The Japan Steel Works Ltd.
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TAKASAWA Koichi
Muroran Research Laboratory, The Japan Steel Works, Ltd.
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ISHIGAKI Ryoji
Muroran Research Laboratory, The Japan Steel Works, Ltd.
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KAYANO Rinzo
Muroran Research Laboratory, The Japan Steel Works, Ltd.
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Takasawa Koichi
Muroran Research Laboratory The Japan Steel Works Ltd.
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Kayano Rinzo
Muroran Research Laboratory The Japan Steel Works Ltd.
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Ishigaki Ryoji
Muroran Research Laboratory The Japan Steel Works Ltd.
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