Numerical simulation of cavitation behavior and peening experiments in cavitation peening processing

• Published in: Journal of physics. Conference series Vol. 1064; no. 1; pp. 12043 - 12054
• Main Authors: Tan, Zhongrui, Wang, Yun, Li, Fuzhu, Li, Ruitao, Yu, Chao, Fan, Haiyang, Wang, Jianjie
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.07.2018
• Subjects: Aluminum base alloys; Cavitation; Compressive properties; Hydraulic jets; Morphology; Physics; Pipe nozzles; Process parameters; Residual stress; Simulation; Stress distribution; Surface roughness
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1064/1/012043

The software, Fluent, was used to analyze the cavitation behavior of the submerged water jets generated by contraction nozzle, angle nozzle and organ pipe nozzle. Angle nozzle was chosen for cavitation peening based on the results of numerical simulation. The cavitation peening experiments for aluminum alloy 2A12 were conducted with the different processing parameters. The surface roughness, residual stress distribution and morphology of the treated sample surface were investigated. Results show that the distribution of strengthening area is consistent with that of simulated cavitation bubbles cluster. Using the optimized parameters, the surface residual compressive stress and its depth reach the maximum values of 320MPa and 390μm, respectively, which were increased nearly 2.7 times and 5.5 times than those of the original sample, respectively, while the corresponding surface roughness was only 1.29μm, which was much smaller than that of conventional shot peening.