4D microstructural characterization of corrosion and corrosion-fatigue in a Ti-6Al-4V/AA 7075-T651 joint in saltwater environment

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:825

Article

Niverty, Sridhar¹  Chawla, Nikhilesh¹ 

[1] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47906 USA

关键词: Aluminum alloys;    Corrosion;    X-ray computed tomography;    Corrosion fatigue;    Failure analysis;    Correlative microscopy;   

DOI  :  10.1016/j.msea.2021.141886

来源: Elsevier

【 摘 要 】

Dissimilar alloy couples are susceptible to environmentally assisted damage owing to the presence of crevices and potential difference between the constituent alloys. In this study, x-ray computed tomography has been employed to non-destructively study the corrosion behavior of a dissimilar alloy fastener-plate couple (AA7075-T651/Ti-6Al-4V) in a 3.5 wt% NaCl environment. Following this, the specimen was subjected to corrosion fatigue and post fracture failure analysis was performed. The precise locations of corrosion pitting damage in the specimen were studied with respect to corrosion time. Microstructural factors that contribute to crack initiation were identified using a correlative microscopy-based approach and are discussed.

【 授权许可】

Free