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Corrosion Engineering, Science and Technology
The International Journal of Corrosion Processes and Corrosion Control
Volume 57, 2022 - Issue 3
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Research Articles

Effect of ultrasonic impact treatment on corrosion fatigue performance of friction stir welded 2024-T4 aluminum alloy

Binghan Huanga School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang, People’s Republic of ChinaView further author information
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Lei Wangb Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang, People’s Republic of ChinaCorrespondence[email protected]
View further author information
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Xiaopeng Liua School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang, People’s Republic of ChinaView further author information
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Li Huib Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang, People’s Republic of ChinaView further author information
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Jiahui Conga School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang, People’s Republic of China;b Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang, People’s Republic of ChinaView further author information
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Song Zhoua School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang, People’s Republic of China;b Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang, People’s Republic of ChinaView further author information
Pages 243-253 | Received 12 Aug 2021, Accepted 09 Jan 2022, Published online: 24 Jan 2022
 
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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.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by National Natural Science Foundation of China [grant number 51775355].

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