Effect of ultrasonic impact treatment on surface residual stress, microstructure and electrochemical properties of the hot-rolled S355 steel

被引：0
|
作者：
Gu, Bangping [1 ]
Wang, Chenmeng [1 ]
Wang, Yansong [1 ]
Gao, Liqiang [1 ]
Xu, Guanhua [2 ,3 ]
Yang, Yuchen [1 ]
Zhu, Xianwei [1 ]
机构：
[1] Logistics Engineering College, Shanghai Maritime University, Shanghai,201306, China
[2] State Key Laboratory of Fluid Power & Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou,310027, China
[3] Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou,310027, China
来源：
Surface and Coatings Technology | 2024年 / 494卷
关键词：
The effects of ultrasonic impact treatment (UIT) on the microstructure; corrosion resistance; and surface residual stress of hot-rolled S355 steel were investigated. In addition; the improving mechanism of the UIT induced corrosion resistance was discussed. The results show that the UIT can effectively improve the corrosion resistance of hot-rolled S355 steel; and corrosion current density reduction is demonstrated. Based on the corrosion morphology; it can be found that after the UIT the corrosion pits became shallower; the oxide layer becomes denser; and more flocculent structures appear on the surface as well as the appearance of dense irregular curved structures. Moreover; the residual tensile stress on the surface of the hot-rolled S355 steel is transformed into residual compressive stress after the UIT. The grains are refined; and the microhardness is increased; which implied that the significant plastic deformation has occurred on the surface of the hot-rolled S355 steel. The findings confirm that dense oxides could be generated on the surface of hot-rolled S355 steel treated by ultrasonic impact since the residual compressive stress is introduced; the plastic deformation is induced; and the grains are refined. © 2024 Elsevier B.V;
D O I：
10.1016/j.surfcoat.2024.131468
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