Intergranular corrosion in AA5083 alloy: The influence of grain boundary segregation and its detection via TEM

Xiangzhe Meng; Zijing Yang; Yanyan Li; Zehua Dong; Deng Leimin; Xinxin Zhang

Journal of Materials Research and Technology (May 2024)

Intergranular corrosion in AA5083 alloy: The influence of grain boundary segregation and its detection via TEM

Xiangzhe Meng,
Zijing Yang,
Yanyan Li,
Zehua Dong,
Deng Leimin,
Xinxin Zhang

Affiliations

Xiangzhe Meng: Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, PR China
Zijing Yang: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, PR China
Yanyan Li: Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, PR China
Zehua Dong: Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, PR China
Deng Leimin: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, PR China
Xinxin Zhang: Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, PR China; Corresponding author.

Journal volume & issue: Vol. 30
pp. 8529 – 8538

Abstract

Read online

The influence of grain boundary segregation on corrosion behaviour of AA5083 alloy remains unclear. In the present work, the segregation in both as-received and sensitized AA5083 alloys was examined via transmission electron microscopy (TEM). The influence of TEM specimen preparation methods on grain boundary segregation detection was explored. It is revealed that focussed ion beam (FIB) is reliable for the detection of grain boundary segregation. Further, the influence of grain boundary segregation on intergranular corrosion (IGC) of AA5083 alloy was examined. It is indicated that Mg segregation at grain boundary is decisive for IGC development in AA5083-H116 alloy, which also benefits IGC development in sensitized AA5083-H116 alloy by increasing the continuity of grain boundary micro-chemistry.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

About the journal

Abstract

Keywords