Effect of ultrasonic impact treatment on corrosion fatigue performance of friction stir welded 2024-T4 aluminum alloy. (3rd April 2022)

• Record Type: Journal Article
• Authors: Huang, Binghan; Wang, Lei; Liu, Xiaopeng; Hui, Li; Cong, Jiahui; Zhou, Song
• Is Part Of: Corrosion engineering, science, and technology. Volume 57:Number 3(2022)
• Page Start: 243
• Page End: 253
• Publication Date: 2022-04-03
• Subjects: Friction stir welding -- ultrasonic impact treatment -- corrosion -- fatigue life; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1080/1478422X.2022.2028345
• Languages: English
• ISSNs: 1478-422X

Abstract

ABSTRACT: Friction stir weld joints of 2024-T4 are strengthened by ultrasonic impact treatment (UIT). After ultrasonic impact treatment, the grains on the surface of the sample are refined to form a dense deformation layer, and residual compressive stress is applied on the surface of the sample. The corrosion rate and mass-loss rate of the UIT sample are significantly lower than those of the non-UIT sample, and uniform corrosion is exhibited. The average life of the UIT samples in the air is 1.74 times that of the non-UIT samples; meanwhile, the average life of the UIT samples in 3.5% NaCl solution is twice that of the non-UIT samples. The crack sources of the UIT sample in the air shift from the surface to the subsurface below the strengthening layer, whereas those of the sample in the 3.5% NaCl solution are located in the corroded area on the surface of the sample.