研究铁路车轮钢的磨损机制:实验启示与预测绘图

IF 3.1 3区 工程技术 Q2 ENGINEERING, MECHANICAL Lubricants Pub Date : 2024-03-14 DOI:10.3390/lubricants12030093
Nicola Zani, A. Mazzù, Luigi Solazzi, C. Petrogalli
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引用次数: 0

摘要

铁路系统在现代交通网络中发挥着举足轻重的作用,对提高效率和环境可持续发展做出了贡献。本研究调查了铁路工程中磨损现象的多个方面,重点关注其对环境成本和运营效率的重大影响。实验使用高性能双盘设备进行,评估了一系列材料、接触压力和润滑条件。采用振动图评估棘轮行为,同时将磨损率作为疲劳指数(FI)的函数进行分析。结果表明,接触压力、滑移率、材料特性和润滑在决定磨损和棘轮行为方面有着错综复杂的相互作用。确定了氧化磨损和轻度磨损机制,并描述了磨损碎片的成分和形态。这项研究的成果阐明了磨损过程在铁路系统中发挥的关键作用及其对环境产生的深远影响。这一探索有助于不断优化铁路运营,为减少不可避免的污染源和加强可持续发展提供有价值的见解。通过深入研究轮轨材料磨损现象的复杂动态,这项研究为创新解决方案铺平了道路,不仅提高了运营效率,还最大限度地减少了铁路运输的生态足迹。
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Examining Wear Mechanisms in Railway Wheel Steels: Experimental Insights and Predictive Mapping
Railway systems play a pivotal role in modern transportation networks, contributing to both efficiency and environmental sustainability. This study investigated the multifaceted aspects of wear phenomena in railway engineering, focusing on their significant implications for environmental costs and operational efficiency. Experimental trials were conducted using a high-performance bi-disc apparatus, evaluating a range of materials, contact pressures, and lubrication conditions. Shakedown maps were employed to assess ratcheting behaviour, while the wear rate was analysed as a function of the fatigue index (FI). The results reveal the intricate interplay of contact pressure, slip ratio, material properties, and lubrication in determining wear and ratcheting behaviour. Oxidative and mild wear mechanisms were identified, and wear debris composition and morphology were characterised. The outcomes from this research clarify the pivotal role that wear processes play within railway systems and the far-reaching environmental repercussions they entail. This exploration contributes to the ongoing optimisation of railway operations, offering valuable insights aimed at mitigating unavoidable pollution sources and strengthening sustainability efforts. By delving into the intricate dynamics of wear phenomena within wheel–rail material, this research paves the way for innovative solutions that not only enhance operational efficiency but also minimise the ecological footprint of railway transportation.
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来源期刊
Lubricants
Lubricants Engineering-Mechanical Engineering
CiteScore
3.60
自引率
25.70%
发文量
293
审稿时长
11 weeks
期刊介绍: This journal is dedicated to the field of Tribology and closely related disciplines. This includes the fundamentals of the following topics: -Lubrication, comprising hydrostatics, hydrodynamics, elastohydrodynamics, mixed and boundary regimes of lubrication -Friction, comprising viscous shear, Newtonian and non-Newtonian traction, boundary friction -Wear, including adhesion, abrasion, tribo-corrosion, scuffing and scoring -Cavitation and erosion -Sub-surface stressing, fatigue spalling, pitting, micro-pitting -Contact Mechanics: elasticity, elasto-plasticity, adhesion, viscoelasticity, poroelasticity, coatings and solid lubricants, layered bonded and unbonded solids -Surface Science: topography, tribo-film formation, lubricant–surface combination, surface texturing, micro-hydrodynamics, micro-elastohydrodynamics -Rheology: Newtonian, non-Newtonian fluids, dilatants, pseudo-plastics, thixotropy, shear thinning -Physical chemistry of lubricants, boundary active species, adsorption, bonding
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