Jun Cheng, Leyang Dai, Zhilong Xu, Yi Li, Shiqi Chen, Qingshan Jiang, Xuming Zha, Bo Li
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The Effect of Ultrasonic Surface Rolling Process on Corrosion Fatigue Performance of 2Cr13 Steel
The surface layer modification of 2cr13 steel samples was carried out by ultrasonic surface rolling process (USRP) in this work. The surface integrity of the sample and its effect on corrosion fatigue properties were analyzed. The results indicated that a compressive residual stress (CRS) field and hardness gradient field were formed on the surface of the sample after USRP, and the roughness of the modified surface layer with refined microstructure was reduced to different degrees. The corrosion fatigue life of all ultrasonic rolled samples had been improved to some extent, among which the life of S2 sample with the optimum surface integrity was about 40 times higher than that of non-rolled sample. High CRS and ultra-fine grain microstructure in the surface layer significantly inhibited the occurrence of pitting and the initiation of corrosion fatigue cracks on the surface, which were the determining factors for improving the corrosion fatigue life of 2Cr13 stainless steel.
期刊介绍：
Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.
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