储存能量对AA2024-T3合金晶界化学及晶间腐蚀发展的影响

The Influence of Stored Energy on Grain Boundary Chemistry and Intergranular Corrosion Development in AA2024-T3 Alloy.

作者信息

Zhang Xinxin, Zhou Xiaorong, Cai Guangyi, Yu Yang, Lu Xueqin, Jiao Yanbin, Dong Zehua

机构信息

Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

Corrosion and Protection Centre, School of Materials, The University of Manchester, Manchester M13 9PL, UK.

出版信息

Materials (Basel). 2018 Nov 16;11(11):2299. doi: 10.3390/ma11112299.

DOI:10.3390/ma11112299

PMID:30453489

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6265874/

Abstract

Following our previous research, the correlation between the micro-chemistry of grain boundary and the distribution of stored energy in AA2024-T3 alloy is investigated, using the combination of transmission Kikuchi diffraction and transmission electron microscopy. It is found that the difference of dislocation density, namely stored energy, between two neighboring grains significantly affects the micro-chemistry of the grain boundary. Further, it is revealed that intergranular corrosion development in the AA2024-T3 alloy is mainly attributed to the combined effect of grain boundary chemistry and stored energy distribution.

摘要

在我们之前研究的基础上，利用透射菊池衍射和透射电子显微镜相结合的方法，研究了AA2024-T3合金中晶界的微观化学与储能分布之间的相关性。研究发现，相邻两个晶粒之间的位错密度差异，即储能，会显著影响晶界的微观化学。此外，研究还表明，AA2024-T3合金中的晶间腐蚀发展主要归因于晶界化学和储能分布的综合作用。