Correlation between localized plastic deformation and localized corrosion in AA2099 aluminum-lithium alloy

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• 作者：Weijiu Huang ; Yanlong Ma ; Xiaorong Zhou ; Xiaomin Meng ; Yi Liao ; Linjiang Chai ; Yanan Yi and Xinxin Zhang
• 刊名：Surface and Interface Analysis
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：48
• 期：8
• 页码：838-842
• 全文大小：968K
• ISSN：1096-9918

文摘

Localized corrosion in an AA2099-T83 aluminum–lithium alloy has been correlated with localized plastic deformation (LPD) introduced by cold working. The high population density of dislocations in the slip bands associated with LPD promoted preferential precipitation of needle-shaped T₁ (Al₂CuLi) phase during artificial aging. Consequently, preferential attack of the electrochemically active T₁ phase in corrosive environment resulted in selective corrosion of the bands, leading to the development of the characteristic morphology of narrow, parallel volume of corrosion. Copyright