Al‐Li系合金のSCC感受性に及ぼす調質および環境の影響

書誌事項

タイトル別名
  • Effects of temper and environment on SCC susceptibility of Al-Li alloys.
  • Al Liケイ ゴウキン ノ SCC カンジュセイ ニ オヨボス チョウシツ

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抄録

SCC susceptibility of Al-Li alloys 2090 and 2091 was investigated using C-ring specimens machined from the thick plate in S-L direction. The SCC susceptibility depends on the temper conditions, the underaged (UA), peak-aged (PA) and overaged (OA), increasing in the order of OA>PA>UA for alloy 2090, and UA>PA>OA for alloy 2091. Alloy 2090 has higher resistance to SCC initiation than alloy 2091. Under constant immersion in 3.5%NaCl solution, the SCC susceptibility is low, while addition of Li2CO3 promotes SCC. SCC of these Al-Li alloys is attributed to the local anodic dissolution along grain boundaries which depends on the passivation phenomena.

収録刊行物

  • 軽金属

    軽金属 44 (4), 204-209, 1994

    一般社団法人 軽金属学会

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