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 (SCR) of Al-Zn-Mg alloy ingots, plates and extrusions were investigated.(1) SCR of ingots decreased with increased homogenizing temperature.(2) SCR of plates in ST-direction was independent of homogenizing conditions, but in LT-direction decreased by homogenizing at too high temperature.(3) In LT-direction, SCR of plates was superior to that of ingots, but in ST-direction inferior to that of ingots.(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.(5) In the structural factors depending on homogenization and hot working conditions, grain shape was a potential factor governing SCR.(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.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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