Effect of surface microstructure spacing on the cavitation erosion process of stainless steel

IF 5.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Wear Pub Date : 2024-08-15 DOI:10.1016/j.wear.2024.205542
Q.N. Ren , H.X. Hu , Y.G. Zheng
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引用次数: 0

Abstract

Fabricating microstructures on the surface is an innovative method to mitigate cavitation erosion (CE), but there are few studies focus on the effects and mechanisms of microstructure spacing on CE performance. This study has prepared a regular dot array-shaped microstructure with different spacings on the surface of samples. The CE experiments were carried out on both the microstructured samples and smooth samples through a magnetostrictive-vibration cavitation facility. Mass loss measurement and microscopic morphology were utilized to reveal CE characteristics. Numerical simulation was used to study the parameters of the flow field. The results clearly show that the microstructure spacing of 0.25 mm, 0.50 mm, and 1.00 mm samples can improve CE resistance. On these microstructured surfaces, the volume fraction of vapor is reduced and the bubbles move away from it. However, when the microstructure spacing enlarges to 1.50 mm, the damage inside the microstructure groove increases, which will reduce the CE resistance of the materials. As the spacing increases, the volume fraction of vapor on the sample surfaces will increase, and the bubbles in the microstructure groove will congregate, resulting in increasing damage. The research provides the dimensional basis for designing cavitation-resistant surface microstructures.

Abstract Image

表面微观结构间距对不锈钢气蚀过程的影响
在样品表面制备微结构是减轻空化侵蚀(CE)的一种创新方法,但很少有研究关注微结构间距对 CE 性能的影响和机制。本研究在样品表面制备了不同间距的规则点阵状微结构。通过磁致伸缩振动空化设备对微结构样品和光滑样品进行了 CE 实验。质量损失测量和显微形态学被用来揭示 CE 特性。数值模拟用于研究流场参数。结果清楚地表明,微结构间距为 0.25 毫米、0.50 毫米和 1.00 毫米的样品可以提高抗 CE 能力。在这些微结构表面上,水蒸气的体积分数降低,气泡会远离它。然而,当微结构间距增大到 1.50 毫米时,微结构凹槽内的损伤会增加,从而降低材料的抗 CE 能力。随着间距的增大,样品表面水蒸气的体积分数会增加,微结构凹槽中的气泡会聚集,导致损伤加剧。该研究为设计抗气蚀表面微结构提供了尺寸依据。
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来源期刊
Wear
Wear 工程技术-材料科学:综合
CiteScore
8.80
自引率
8.00%
发文量
280
审稿时长
47 days
期刊介绍: Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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