Microstructure and Wear Resistance of Fe3Al Coating on Grey Cast Iron Prepared via Direct Energy Deposition

IF 3.1 3区工程技术 Q2 ENGINEERING, MECHANICAL

Lubricants Pub Date : 2023-11-05 DOI:10.3390/lubricants11110477

Hossein Rajaei, Sasan Amirabdollahian, Cinzia Menapace, Giovanni Straffelini, Stefano Gialanella

{"title":"Microstructure and Wear Resistance of Fe3Al Coating on Grey Cast Iron Prepared via Direct Energy Deposition","authors":"Hossein Rajaei, Sasan Amirabdollahian, Cinzia Menapace, Giovanni Straffelini, Stefano Gialanella","doi":"10.3390/lubricants11110477","DOIUrl":null,"url":null,"abstract":"In this study, the potential of Fe3Al coating material as an environmentally friendly alternative to coatings containing critical elements for brake discs was investigated. A buffer layer of Cr–Mo steel (Ferro 55) that was about 500 µm thick was applied on a gray cast iron disc to enhance the coating quality and prevent the formation of hot cracks during solidification. The microstructural analysis of the cross-section of the coating showed that the buffer layer diffused into the Fe3Al coating, forming a combination of Fe3Al, Fe, and Fe3AlC0.5 phases. The tribological properties of the Fe3Al-coated disc were evaluated using pin-on-disc tests against two different copper-free friction materials extracted from commercial brake pads. The wear results show a coefficient of friction comparable to that of an uncoated disc (≈0.55), but with a reduction in particulate matter (PM) emissions, which decreased from 600 to 476 #/cm3. The last issue is an interesting aspect that is gaining increasing importance in view of the upcoming international standards.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":"38 S24","pages":"0"},"PeriodicalIF":3.1000,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Lubricants","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3390/lubricants11110477","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, the potential of Fe3Al coating material as an environmentally friendly alternative to coatings containing critical elements for brake discs was investigated. A buffer layer of Cr–Mo steel (Ferro 55) that was about 500 µm thick was applied on a gray cast iron disc to enhance the coating quality and prevent the formation of hot cracks during solidification. The microstructural analysis of the cross-section of the coating showed that the buffer layer diffused into the Fe3Al coating, forming a combination of Fe3Al, Fe, and Fe3AlC0.5 phases. The tribological properties of the Fe3Al-coated disc were evaluated using pin-on-disc tests against two different copper-free friction materials extracted from commercial brake pads. The wear results show a coefficient of friction comparable to that of an uncoated disc (≈0.55), but with a reduction in particulate matter (PM) emissions, which decreased from 600 to 476 #/cm3. The last issue is an interesting aspect that is gaining increasing importance in view of the upcoming international standards.

查看原文本刊更多论文

直接能量沉积法灰口铸铁表面Fe3Al涂层的组织与耐磨性

在这项研究中，研究了Fe3Al涂层材料作为含有关键元素的制动盘涂层的环保替代品的潜力。在灰铸铁盘上涂覆约500 μ m厚的Cr-Mo钢(Ferro 55)缓冲层，以提高涂层质量，防止凝固过程中形成热裂纹。涂层截面的显微组织分析表明，缓冲层扩散到Fe3Al涂层中，形成Fe3Al、Fe和Fe3AlC0.5相的组合。通过针对盘试验，对从商用刹车片中提取的两种不同的无铜摩擦材料进行了fe3al涂层盘的摩擦学性能评估。磨损结果表明，摩擦系数与未涂覆圆盘相当(≈0.55)，但颗粒物质(PM)排放量减少，从600下降到476 #/cm3。最后一个问题是一个有趣的方面，鉴于即将出台的国际标准，它正变得越来越重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

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