Li Wenlong, Yao Hongbing, Ding Zhipeng, Zhou Yuanhang, Wei Pengyu, Yue Jiang, Su Wei, Zhu Weihua
College of Science, Hohai University, Nanjing 211100, China.
China Ship Scientific Research Center, Wuxi 214082, China.
Materials (Basel). 2023 Jul 19;16(14):5096. doi: 10.3390/ma16145096.
Marine flow-passing components are susceptible to cavitation erosion (CE), and researchers have worked to find ways to reduce its effects. Laser Shock Peening (LSP), a material strengthening method, has been widely used in aerospace and other cutting-edge fields. In recent years, LSP has been used in cavitation resistance research. However, the current LSP research does not realize a comprehensive predictive assessment of the material's CE resistance. This paper uses m stresses to develop a comprehensive set of strengthening effect prediction models from LSP to CE using finite element analysis (FEA). Results show that the LSP-1 sample (4 mm spot, 10 J energy) introduced a compressive residual stress value of 37.4 MPa, better than that of 16.6 MPa with the LSP-2 sample (6 mm spot, 10 J energy), which is generally consistent with the experimental findings; the model predicts a 16.35% improvement in the resistance of LSP-1 sample to water jet damage, which is comparable to the experimental result of 14.02%; additionally, interactions between micro-jets do not predominate the cavitation erosion process and the final CE effect of the material is mainly due to the accumulation of jet-material interaction.
船用过流部件易受空蚀（CE）影响，研究人员一直在努力寻找减轻其影响的方法。激光冲击强化（LSP）作为一种材料强化方法，已在航空航天等前沿领域广泛应用。近年来，LSP已用于抗空蚀研究。然而，目前的LSP研究尚未实现对材料抗CE性能的全面预测评估。本文利用m应力，通过有限元分析（FEA）建立了一套从LSP到CE的强化效果预测模型。结果表明，LSP-1试样（光斑4mm，能量10J）引入的残余压应力值为37.4MPa，优于LSP-2试样（光斑6mm，能量10J）的16.6MPa，这与实验结果基本一致；该模型预测LSP-1试样抗水射流损伤性能提高16.35%，与14.02%的实验结果相当；此外，微射流之间的相互作用在空蚀过程中不占主导地位，材料最终的CE效果主要是由于射流与材料相互作用的积累。
