湿潤空気中におけるアルミニウム合金切欠き板材の水素脆化特性

DOI Web Site 被引用文献6件 参考文献22件

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タイトル別名
  • Hydrogen embrittlement properties of notched-aluminum alloy plates in humid air
  • 湿潤空気中におけるアルミニウム合金切欠き材の水素脆化特性
  • シツジュン クウキチュウ ニ オケル アルミニウム ゴウキン キリカキザイ ノ スイソ ゼイカ トクセイ

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抄録

For 6061-T6 and 7075-T6 aluminum alloy plates, SSRT (slow strain-rate technique) tests in humid air with 90% relative humidity were carried out using a notched tensile specimen to evaluate the susceptibility to hydrogen embrittlement and to appreciate the role of notch in the process of HEAC (hydrogen-environment-assisted cracking). 7075-T6 showed a significant embrittlement due to intergranular cracking more inspired by the existence of notch, while in contrast, 6061-T6 exhibited a trend of an enhanced plastic deformation by hydrogen effects, accompanied with a trace of nonconventional TTS facet in fracture surface and an increase in notch opening displacement in the early stage of still low stress level. The SSRT behaviors of these alloys are explained to result from the mechanism of hydrogen-enhanced localized plasticity, where the process of hydrogen population is supported to include both effects of trapping at microstructural defects such as inclusions and stress-induced diffusion at macroscopic defects such as notch.

収録刊行物

  • 軽金属

    軽金属 57 (2), 74-79, 2007

    一般社団法人 軽金属学会

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