Study on corrosion resistance of artificially aged 7075 aluminium alloy by using Cs-corrected STEM

作     者：Fang LIU Jing-xu ZHENG Xia CHEN Xue-song XU Bin CHEN 刘芳;郑景旭;陈霞;许雪松;陈彬

作者机构：State Key Laboratory of Refractories and MetallurgyWuhan University of Science and TechnologyWuhan 430081China School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Materials Science and EngineeringCornell UniversityNY 14853USA 

基　　金：supported by the Open Fund of the State Key Laboratory of Refractories and Metallurgy China(No.G201907) 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2022年第32卷第9期

页      码：2828-2837页

摘      要：This research studied the mechanism of the corrosion resistance enhancement of artificially aged 7075 aluminium alloy using advanced Cs-corrected scanning transmission electron microscopy(STEM).The corrosion behaviors of artificially aged 7075 aluminium alloys in a 3.5 wt.%NaCl solution were investigated by impedance spectra,equivalent circuit analyses,polarization measurements and immersion *** results show that a longer aging treatment leads to better corrosion resistance,which can be attributed to the following microstructural features,as revealed by *** Cu segregation at grain boundaries under over-aged conditions helps retard intergranular *** Mg(Zn,Cu)_(2) precipitates formed on the surfaces of Al_(18)Mg_(3)(Cr,Mn)_(2) dispersoids effectively insulate the dispersoids as cathodes in corrosion,from the Al *** study demonstrates a potential strategy to design corrosion-resistant alloys achieved by proper alloying and subsequent aging.

主 题 词：7075 aluminium alloy artificial aging Mg(Zn,Cu)_(2)precipitate intergranular corrosion Cs-corrected scanning transmission electron microscopy 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1003-6326(22)65986-7

馆 藏 号：203114635...