材料科学
微观结构
腐蚀
合金
晶界
溶解
原电池
冶金
粒度
电偶腐蚀
变形(气象学)
复合材料
化学工程
工程类
作者
Rahul Rakshit,Darothi Bairagi,Sushanta Kumar Panda,Sumantra Mandal
标识
DOI:10.1016/j.matlet.2023.134608
摘要
This study investigates the corrosion response of Al-Li alloy following deformation along three strain paths, viz. uniaxial, plane strain, and equi-biaxial. The electrochemical studies have revealed that the dissolution behaviour of the as-received and deformed specimens is significantly influenced by grain orientation and grain boundary character distribution. The higher fraction of 〈0 0 1〉 // ND grains minimises the dissolution rate by forming a stable film over the specimen. The densely populated sub-grain boundaries, distributed uniformly throughout the microstructure, improve the charge transfer resistance and compensate for the deterioration in corrosion behaviour induced by the presence of higher fraction of 〈0 1 1〉 // ND grains. Further, a microstructure consisting of both 〈0 0 1〉 // ND and 〈0 1 1〉 // ND oriented grains induces micro-galvanic corrosion and forms a highly non-uniform film, degrading the overall corrosion response.
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