Cavitation erosion of materials
Cavitation erosion of materials
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DOI：
10.1179/imtr.1986.31.1.1
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发表时间：
1986-01
期刊：
影响因子：
--
通讯作者：
A. Karimi;J. Martín
中科院分区：
文献类型：
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作者：
A. Karimi;J. Martín
经过一个简短的历史调查的空蚀及其有害影响，侵蚀和材料的反应被认为是从应力场产生的角度来看，空蚀崩溃和随之而来的物理和化学过程，有助于侵蚀破坏。然后强调腐蚀前塑性变形的微观结构方面，并与通常的材料力学行为测试中观察到的缺陷和位错排列进行比较。本文介绍了冲蚀损伤评价的实验方法，并介绍了不同类型的实验室试验装置的冲蚀损伤结果。侵蚀速率曲线和表面形貌的发展进行了讨论。在最后一节中，对已发表的耐腐蚀性（定义为单位时间内的重量损失）与材料的其他机械特性之间的相关性数据进行了严格审查。本节继续对空蚀和其他类型的侵蚀进行简短的比较，然后描述一些补救措施和应用的工业技术，以防止和减少侵蚀损害。然后总结了土壤侵蚀预测模型和假说。最后，在本综述的结论中，建议应将空蚀视为一种独特类型的材料损伤。这是支持由空化和侵蚀表面的电子显微镜观察所施加的应力的分析。因此，空化应力和其他机械处理的影响之间没有直接联系。
After a brief historical survey of cavitation and its deleterious effects, erosion and material response are considered from the point of view of stress field generation caused by cavitation collapse and the ensuing physical and chemical processes which contribute to erosion damage. The microstructural aspects of plastic deformation preceding erosion are then emphasized and compared with the defects and dislocation arrangements observed in the usual mechanical behaviour testing of materials. Experimental methods of erosion damage evaluation are described, followed by a presentation of results of erosion damage obtained from different types of laboratory test devices. Erosion-rate curves and surface topography developments are discussed. In the last section, a critical review of published data on correlation between erosion resistance, defined as weight loss per unit time, and the other mechanical characteristics of materials is presented. This section is continued with a short comparison between cavitation erosion and other types of erosion, followed by a description of some remedies and applied industrial techniques to prevent and reduce erosion damage. Erosion prediction models and hypotheses are then summarized. Finally, in the conclusion of this review, it is proposed that cavitation erosion should be considered as a unique type of material damage in its own right. This is supported by the analysis of the stresses imposed by cavitation and the electron microscopy observations of the eroded surfaces. Thus, no direct connection is to be expected between the effects of cavitation stressing and other mechanical treatments.