The influence of material hardness on liquid droplet impingement erosion

被引：21

作者：

Fujisawa, Nobuyuki ^{[1
]}

Yamagata, Takayuki ^{[1
]}

Takano, Shotaro ^{[2
]}

Saito, Kengo ^{[2
]}

Morita, Ryo ^{[3
]}

Fujiwara, Kazutoshi ^{[3
]}

Inada, Fumio ^{[3
]}

机构：

[1] Niigata Univ, Visualizat Res Ctr, Nishi Ku, Niigata 9502181, Japan

[2] Niigata Univ, Grad Sch Sci & Technol, Nishi Ku, Niigata 9502181, Japan

[3] Cent Res Inst Elect Power Ind, Komae, Tokyo 2018511, Japan

来源：

NUCLEAR ENGINEERING AND DESIGN | 2015年 / 288卷

关键词：

Aluminum alloys - Scanning electron microscopy - Film thickness - Fighter aircraft - Liquid films - Vickers hardness - Drops;

D O I：

10.1016/j.nucengdes.2015.03.016

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

This paper describes the experimental study on the liquid droplet impingement erosion of metal materials to understand the influence of material hardness on the erosion rate. The experiment is carried out using a water spray jet apparatus with a condition of relatively thin liquid film thickness. The metal materials tested are pure aluminum, aluminum alloy, brass, mild steel, carbon steel and stainless steel. The liquid droplets considered are 30 +/- 5 mu m in volume average diameter of water, which is the same order of droplet diameter in the actual pipeline in nuclear/fossil power plants. In order to understand the influence of material hardness on the liquid droplet impingement erosion, the scanning electron microscope (SEM) observation on the eroded surface and the measurement of erosion rate are carried out in the terminal stage of erosion. The experimental results indicate that the erosion rates are expressed by the droplet velocity, volume flux, Vickers hardness and the liquid film thickness, which are fundamentals of the liquid droplet impingement erosion. The empirical formula shows that the power index for droplet velocity dependency is found to be 7 with a scattering from 5 to 9 depending on the materials, while the power index for Vickers hardness dependency is found as -4.5. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：27 / 34

页数：8

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