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含CrN物理气相沉积涂层的316L钢空蚀的数值分析

Numerical Analysis of Cavitation Erosion in 316L Steel with CrN PVD Coating.

作者信息

Maurin Artur

机构信息

Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Hydropower Department, Fiszera 14 St., 80-231 Gdansk, Poland.

出版信息

Materials (Basel). 2024 Sep 6;17(17):4397. doi: 10.3390/ma17174397.

DOI:10.3390/ma17174397
PMID:39274786
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11395784/
Abstract

The erosion process of a 4 μm monolayer CrN coating deposited on 316L stainless steel due to cavitation was investigated using finite element analysis (FEA). To estimate load parameters from cavitation pit geometry resulting from high impact velocity and high strain rate, the explicit dynamic solver was employed. Water microjet impacts at velocities of 100, 200 and 500 m/s were simulated to recreate different cavitation erosion intensities observed in the experiment. The resulting damage characteristics were compared to previous studies on uncoated 316L steel. The relationship between impact velocity and postimpact geometry was examined. Simulations revealed that only impact at 500 m/s can exceed the maximum yield stress of the substrate without penetrating the coating. Subsequent impacts on the same zone deepen the impact pit and penetrate the coating, leading to direct substrate degradation. The influence of impact velocity on the coating degradation process is discussed.

摘要

采用有限元分析（FEA）研究了沉积在316L不锈钢上的4μm单层CrN涂层因空蚀而产生的侵蚀过程。为了根据由高冲击速度和高应变率产生的空蚀坑几何形状估算载荷参数，采用了显式动力学求解器。模拟了速度为100、200和500m/s的水微喷射冲击，以重现实验中观察到的不同空蚀强度。将所得损伤特征与先前关于未涂层316L钢的研究进行了比较。研究了冲击速度与冲击后几何形状之间的关系。模拟结果表明，只有500m/s的冲击才能超过基体的最大屈服应力而不穿透涂层。随后在同一区域的冲击会加深冲击坑并穿透涂层，导致基体直接降解。讨论了冲击速度对涂层降解过程的影响。

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本文引用的文献

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Micromachines (Basel). 2023 Dec 23;15(1):38. doi: 10.3390/mi15010038.
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Degradation and Protection of Materials from Cavitation Erosion: A Review.材料的气蚀磨损降解与防护：综述
Materials (Basel). 2023 Mar 2;16(5):2058. doi: 10.3390/ma16052058.
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