Experimental study of erosion behavior under fluctuating tensile loads

IF 1.6 3区工程技术 Q3 ENGINEERING, MECHANICAL

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-09-20 DOI:10.1177/13506501231201894

Siwei Dai, Jianchun Fan, Siqi Yang

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引用次数: 0

Abstract

When studying the erosion behavior of fracturing pipelines, it is inevitable to consider the exacerbating effect of fluctuating internal pressure on pipeline erosion damage. Therefore, an erosion experimental apparatus capable of applying fluctuating tensile loads to specimens was developed to investigate the erosion rate of 35CrMo steel at different average tensile stresses (0–500 MPa), impact angles (15–90°), flow velocity (7.5–20 m/s), and experimental times (10–60 min), and to analyze the erosion damage mechanism under fluctuating loads by observing the microstructure within the erosion scars using scanning electron microscope. The results indicated that erosion rate increased up to 36.84% compared to that without loading under the same erosion condition. Erosion rate increased up to 822.00% when velocity increased from minimum to maximum. Under fluctuating loads, the deepest part of the erosion scar cracked first and the specimen eventually fractured completely along with its entire width, demonstrating that the newly established experimental conditions can well reproduce the sudden bursting phenomenon common to high-pressure pipelines that erode under harsh conditions. The fracture of the specimen shows laminar structure, which is a typical damage feature resulting from the combined effect of a great number of tensile stress cycles and erosion wear.

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波动拉伸载荷作用下的冲蚀试验研究

在研究压裂管道的冲蚀行为时，不可避免地要考虑内压波动对管道冲蚀损伤的加剧作用。为此，研制了能够对试样施加波动拉伸载荷的冲蚀实验装置，研究了35CrMo钢在不同平均拉伸应力(0 ~ 500 MPa)、冲击角(15 ~ 90°)、流速(7.5 ~ 20 m/s)、实验时间(10 ~ 60 min)下的冲蚀速率，并通过扫描电镜观察冲蚀伤痕内部的微观结构，分析了波动载荷作用下的冲蚀损伤机理。结果表明，在相同的侵蚀条件下，侵蚀速率比未加载时提高了36.84%。当流速由最小到最大时，侵蚀速率增加822.00%。在波动荷载作用下，侵蚀疤痕最深处首先开裂，最终沿其宽度完全破裂，表明新建立的实验条件可以很好地再现高压管道在恶劣条件下侵蚀时常见的突然破裂现象。试样断口呈层状结构，是大量拉应力循环和冲蚀磨损共同作用下的典型损伤特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 工程技术-工程：机械

CiteScore

4.20

自引率

5.00%

发文量

110

审稿时长

6.1 months

期刊介绍： The Journal of Engineering Tribology publishes high-quality, peer-reviewed papers from academia and industry worldwide on the engineering science associated with tribology and its applications. "I am proud to say that I have been part of the tribology research community for almost 20 years. That community has always seemed to me to be highly active, progressive, and closely knit. The conferences are well attended and are characterised by a warmth and friendliness that transcends national boundaries. I see Part J as being an important part of that community, giving us an outlet to publish and promote our scholarly activities. I very much look forward to my term of office as editor of your Journal. I hope you will continue to submit papers, help out with reviewing, and most importantly to read and talk about the work you will find there." Professor Rob Dwyer-Joyce, Sheffield University, UK This journal is a member of the Committee on Publication Ethics (COPE).