３５ＭＰａ水素ステーション蓄圧器用ＳＣＭ４３５鋼のシャルピー衝撃特性に及ぼす組織の影響とＬＢＢ評価

DOI Web Site 被引用文献6件 参考文献4件
  • 松尾 尚
    九州大学大学院工学府
  • 山辺 純一郎
    九州大学水素エネルギー国際研究センター，産業技術総合研究所水素材料先端科学研究センター
  • 福島 良博
    九州大学大学院工学研究院，産業技術総合研究所水素材料先端科学研究センター
  • 松岡 三郎
    九州大学大学院工学研究院，産業技術総合研究所水素材料先端科学研究センター
  • 村上 敬宜
    九州大学，理事・副学長，産業技術総合研究所水素材料先端科学研究センター

書誌事項

タイトル別名
  • Effect of Microstructure on Charpy Impact Properties and LBB Assessment of SCM435 Steel for Storage Cylinders of 35MPa Hydrogen Stations
  • 35MPa スイソ ステーション チクアツ キヨウ SCM435 コウ ノ シャルピー ショウゲキ トクセイ ニ オヨボス ソシキ ノ エイキョウ ト LBB ヒョウカ

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抄録

Influence of hydrogen on tensile and Charpy impact properties of quench-tempered low-alloy steels, SCM435s for four types of storage cylinders in 35MPa hydrogen stations, was investigated. After tensile and Charpy impact specimens were exposed to hydrogen gas at 100MPa and 85°C, tensile tests were conducted at room temperature in air under a cross-head speed of 1mm/min, and Charpy impact tests were conducted at temperatures from -100 and 100°C in air. Residual hydrogen contents of these specimens were also measured by TDA (Thermal Desorption Analysis). The tensile strength of hydrogen-exposed specimens, whose residual hydrogen contents ranged from 0.29 to 0.44 mass ppm, were nearly equal to that of unexposed specimens, while the reduction of area of hydrogen-exposed specimens were about 10% lower than that of unexposed specimens. The Charpy impact properties of hydrogen-exposed specimens were consistent with those of unexposed specimens. Microstructures of these materials were observed by EBSD (Electron Back Scatter Diffraction). EBSD analysis clarified that the fracture appearance transition temperature became lower, when the block grain size of martensite became smaller. The upper-shelf absorbed energy increased with decreasing the block grain size. Fracture thoughness values of the materials were estimated from the upper-shelf absorbed energy ; then, evaluation of LBB (Leak-before-break) of 35MPa hydrogen storage cylinders was conducted.

収録刊行物

  • 材料

    材料 59 (12), 924-931, 2010

    公益社団法人 日本材料学会

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