Single asperity abrasion of coated nodular cast iron

Masen, Marc Arthur; Rooij, M.B. de; Schipper, Dirk J.; Adachi, K.; Kato, Koji

doi:10.1016/j.triboint.2005.11.023

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…Important evidence was detected in [23] that the application of Equation (7) was dependent on the level of applied load. Introduction of the Ratio of the Hardness to the Reduced Elastic Modulus for Abrasion http://dx.doi.org/10.5772/55470…”

Section: Modelling Abrasion With E/h Ratiomentioning

confidence: 99%

Introduction of the Ratio of the Hardness to the Reduced Elastic Modulus for Abrasion

Pintaúde¹

2013

Tribology - Fundamentals and Advancements

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/55470 . IntroductionModelinμ tνe wear rate is a complex process. Tνe several possibilities of cνemical, pνysical and mecνanical cνanμes at tνe interface are tνe most probable reasons for tνis [ ]. In tνis manner, it is reasonable to consider tνe wear rate as a stocνastic process [ , ], and indeed tνis approacν was taken into account by Arcνard [ ], wνen νe formulated νis well-known model. Since tνen, tνe majority of available models are based on νis proposition, independent on tνe cνaracteristics of mecνanical system. Considerinμ a sνarp contact, botν Torrance [ ] and YiLinμ & Zi-Sνan [ ] for slidinμ and rollinμ abrasion, respectively, modified Arcνard s equation based on elastic effects, and tνe ratio of tνe νardness H to tνe Younμ s modulus E was tνe main parameter of tνe models. In a triboloμical system witν dissimilar materials, for example a ceramic abradinμ a metal, one material can experience tνe yieldinμ and tνe otνer tνe brittle failure. Tνis difference in tνe mecνanical beνaviors can be decisive for tνe final performance to wear.Tνe use of Younμ s modulus to model tνe wear resistance was applied for coatinμs [ ] it appeared in otνer modifications of Arcνard s equation [ ], and even in empirical relationsνips between tνe wear rate and tνe mecνanical properties [ ]. Eventually, in all cited cases, tνe elastic modulus was not tνe reduced one E r , as will be treated νere.A selection of parameters involvinμ νardness and elastic moduli can be summarized Table [ -]. All of tνem νave pνysical meaninμs tνat possess some interest for abrasion resistance of materials. Tνe last parameter presented in Table , H /E , is proportional to tνe load tνat defines tνe transition between elastic to plastic contact in a ball-on-plane system, applyinμ tνe analytical solutions provided by Hertz in Contact Mecνanics [ ], wνere tνe reduced modulus is already taken into account. Parameter Physical meaning (taking into account a rigid-plastic material)H/E Deformation relative to yielding [9] (H/E) Usinμ some of tνe abovementioned solutions, a case study will be presented. For two triboloμical pairs witν known wear coefficients, tνe ratio of νardness to reduced modulus works well tνan tνe sinμle property of tνe worn material E . Tνe expectation reμardinμ tνe H/E r ratio is confirmed also by otνer aspects used to cνaracterize abrasion, especially tνe cuttinμ efficiency. . Modelling abrasion with E/H ratioIn Torrance [ ] publisνed a model for abrasive wear rate based on tνe elastic recovery after scratcνinμ, supposinμ tνat tνe abrasive particle νas a conical μeometry. Tνis cνoice is suitable, because tνere is an analytical model to describe tνe cνanμes at tνe recovered surface [ ]. Some years later, anotνer paper [ ] adopted tνe same pνysical basis but νere tνe application occurred to systems wνere tνe abrasive particles roll, instead of slide. Tνe key similarities and differences of botν manuscripts will be discussed below.First of all, it i...

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Section: Modelling Abrasion With E/h Ratiomentioning

confidence: 99%

Introduction of the Ratio of the Hardness to the Reduced Elastic Modulus for Abrasion

Pintaúde¹

2013

Tribology - Fundamentals and Advancements

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“…Therefore in some cases the part of the material can be transferred to the lateral ad frontal prow while the rest of the material is removed from the surface as cutting chips. The morphology of the scratch traces depends on different parameters: the frontal area of the indenter, the efficiency of the removal process, tribological and kinematics conditions, etc… [25]. Those mechanisms in case of ductile cast iron are also governed by the distribution of graphite nodules.…”

Section: Sclerometric Investigationsmentioning

confidence: 99%

Sclero-topometry Metrology in Valorisation of Waste Oil for Micro-machining of Ductile Cast Iron

Eymard¹,

Ignaszak²,

Mathia³

2013

Archives of Foundry Engineering

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During the time, the specific characteristics and the efficient lifetime of oil progressively decrease, due to complex pollution, ultimately making the oil unsuitable for the initial applications. The strategy to regenerate and to valorise waste oils is investigated using improved combinations of sclerometric and topometric tests on ductile nodular cast iron. Tribo-abrasive tests are performed in critical conditions, with base oil, waste oil and regenerated oil, of similar viscosities in order to discriminate their interfacial performances. The forms of the scratch traces indicate wear resistance and tendency to elasto-plastic deformation. The mechanisms of deformation and frictional behaviours were evaluated using optical and Scanning Electron Microscopy and measured for various tribological conditions with tactile and optical profilometry. The Energy Dispersive X ray Spectroscopy completes the chemical superficial distribution of pertinent elements. The surface topography metrology is used to characterize the scratch profiles and to determine the volume of the displaced and removed material, as well as maximum pit height. The originality of this paper is that it is a unique approach specifically devoted to transformer oil concerning tribological conditions.

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“…Under dry lubrication, with the increase of the normal load, the deformation mode changes from a ploughed mode to a mode of abrasive wear and then a cutting mode [17,18]. The morphology of scratch furrow depends on the real contact area between the indentor and the cast iron, the effectiveness of the method of material removal and the kinematic and tribological conditions [19].…”

Section: Lubricants Effect Discrimination Morphological Analysis In D...mentioning

confidence: 99%

“…-The cutting mode, (ξ = 0.80 to 0.95): the degree of wear is close to 1 indicating a removal of material in chip form, without the formation of ploughed material. Despite the model proposed by Kato [19,23] giving map modes deformation processes clearly defined in relation to each other, recent studies show that different processes may occur simultaneously. Analyses by profilometry provide metrological information of the surface which has been plastically deformed, through the measurement of volume penetrated (V S ) and ploughed from the scratch (V B1 and V B2 ), separated by a median plane P, corresponding to the plane root mean square points located on a perimeter defined outside of the deformed area.…”

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confidence: 93%

Sclero-Topometry in Superficial Wear and Metal Processing of Ductile Cast Iron at Boundary Lubrication. Application to Tribological Valorization of Waste Oil

Eymard¹,

Ourahmoune

Bouvier³

et al. 2013

KEM

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In order to better understand superficial abrasive wear and metal processing sclero-topometric investigations have been developed and applied to spheroidal cast iron at boundary lubrication regime with new, waste and regenerated oils. Recycling of waste oils is the major challenge of worldwide society today, specifically for petroleum resources, and therefore, for derivatives like transformer oil. The contradictory characteristics from physical approach of transformer oil, requiring and insuring simultaneously a high thermal conductivity as well as an electrical resistivity, are specific for their applications. During the efficient lifetime, these characteristics progressively decrease, due to complex pollution (divers pollutions, water absorption, Polychlorobiphenyl (PCB), etc) and degradation (acids, resins, polluted oils, biological invasions, wear debris's du to local frictions, fretting, etc…), ultimately making the oil unsuitable for the initial application. [1] The strategy to upgrade the waste oil is investigated in the presented work using improved sclerometric and topometric characterisations [2,3] on deliberately selected heterogeneous material - ductile cast iron (with spheroidal graphite precipitations) widely manufactured for various transport industry[4].

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Single asperity abrasion of coated nodular cast iron

Cited by 9 publications

References 17 publications

Introduction of the Ratio of the Hardness to the Reduced Elastic Modulus for Abrasion

Introduction of the Ratio of the Hardness to the Reduced Elastic Modulus for Abrasion

Sclero-topometry Metrology in Valorisation of Waste Oil for Micro-machining of Ductile Cast Iron

Sclero-Topometry in Superficial Wear and Metal Processing of Ductile Cast Iron at Boundary Lubrication. Application to Tribological Valorization of Waste Oil

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