Effect of Stabilization Treatment and Cu Content on theβPhase Distribution of 5182 Aluminum Alloy Sheets for Can Lid
The βphase distribution of 5182 aluminum alloy sheets with two kinds of Cu content after different temperature stabiliza-tion treatmentw was studied.The results show that:(1)When the stabilization temperature is lower than 120℃,a large amount of β phase is continuously precipitated along the grain boundary and shear zone of both kinds of sheets;When the stabilization temperature is 160℃,the continuous precipitation of βphase of the two sheets is significantly reduced;When the stabilization temperature is high-er than 160℃,the continuous precipitation of βphase gradually decreases with the increase of stabilization temperature;When the sta-bilization temperature is 220℃,the βphase distribution is the most uniform,and there is no obvious continuous precipitation phe-nomenon,which suggests that the fracture sensitivity of the material against stress corrosion is the best.(2)The 5182 sheets with 0.1%copper mass fraction has less βphase precipitation and more uniform distribution than the 5182 sheets with 0.06%copper mass fraction.
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