Ａｌ‐Ｚｎ‐Ｍｇ合金の耐応力腐食割れ性に及ぼす鋳塊均質化処理条件の影響

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  • Effects of homogenization conditions of ingots on stress corrosion resistance of Al-Zn-Mg alloys
  • Al Zn Mg ゴウキン ノ タイ オウリョク フショク ワレセイ ニ オヨ

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説明

Effects of homogenization conditions of ingots on stress corrosion resistance (SCR) of Al-Zn-Mg alloy ingots, plates and extrusions were investigated.<br>(1) SCR of ingots decreased with increased homogenizing temperature.<br>(2) SCR of plates in ST-direction was independent of homogenizing conditions, but in LT-direction decreased by homogenizing at too high temperature.<br>(3) In LT-direction, SCR of plates was superior to that of ingots, but in ST-direction inferior to that of ingots.<br>(4) SCR in LT-direction of extrusions without homogenization decreased when extrusion speed was higher, while that of extrusions extruded at lower extrusion speed was independent of homogenizing conditions.<br>(5) In the structural factors depending on homogenization and hot working conditions, grain shape was a potential factor governing SCR.<br>(6) Relationship between SCR and grain shape was explained by the assumption that the higher the per-pendicular component to grain boundary of applied stress, and the flatter and the more monotonous the grain boundary, the longer the stress corrosion cracking life.

収録刊行物

  • 軽金属

    軽金属 26 (10), 501-509, 1976

    一般社団法人 軽金属学会

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