Fundamental wear mechanism of metals

Scherge, Matthias; Shakhvorostov, D.; Pöhlmann, K.

doi:10.1016/s0043-1648(03)00273-4

Cited by 102 publications

(63 citation statements)

References 12 publications

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“…Surfaces in this system operate in contact and must be resistant to wear and friction and at the same time have to provide high mobility of the joint. From studies on technical systems, the structure and the mechanical properties of superficial layers of the material are believed to be very important for its tribological performance (Scherge, 2003;Chakhvorostov, 2004).…”

Section: Introductionmentioning

confidence: 99%

Local mechanical properties of the head articulation cuticle in the beetlePachnoda marginata(Coleoptera, Scarabaeidae)

Barbakadze

Enders

Gorb

et al. 2006

Journal of Experimental Biology

137

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SUMMARY Insect exoskeleton (cuticle) has a broad range of mechanical properties depending on the function of a particular structure of the skeleton. Structure and mechanical properties of the specialised cuticle of insect joints remain largely unknown to date. We used scanning (SEM) and transmission electron microscopy (TEM) to obtain information about the material structure of the gula plate, the head part of the head-to-neck articulation system in the beetle Pachnoda marginata. The surface of this cuticle appears rather smooth in SEM. The fibers of the exocuticle are partly oriented almost perpendicular to the surface, which is rather unusual for arthropod cuticle. Nanoindentation experiments were performed to determine the local mechanical properties (hardness and elastic modulus) of the gula material. To understand the effect of desiccation and the influence of an outer wax layer on the mechanical behavior of the material, the samples were tested in fresh, dry and chemically treated (lipid extraction in organic solvents) conditions. Nanoindentation results were found to be strongly influenced by desiccation but only slightly by lipid extraction. Decreasing water content (∼15-20%of the cuticle mass) led to an increase in hardness (from 0.1 to 0.49 GPa) and elastic modulus (from 1.5 to 7.5 GPa). The lipid extraction caused a slight further hardening (to 0.52 GPa) as well as stiffening (to 7.7 GPa) of the material. The results are discussed in relation to the mechanical function of the gula plate.

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Section: Introductionmentioning

confidence: 99%

Local mechanical properties of the head articulation cuticle in the beetlePachnoda marginata(Coleoptera, Scarabaeidae)

Barbakadze

Enders

Gorb

et al. 2006

Journal of Experimental Biology

137

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“…This layer can be deposited to the surface artificially or it can appear naturally through mechanically induced chemical reactions of the base material with surrounding substances (lubricant, counter-body, air and so on) [9,10]. Assume that due to normal loading and tangential sliding a junction with the diameter D is formed, and that the Diameter D is much larger than the thickness of the layer (the opposite case corresponds to a homogeneous medium and is covered by Eq.(3)).…”

Section: Wear In Systems With a Soft Surface Layermentioning

confidence: 99%

“…However, the surface region of contacts in most low-wear technical systems is not homogeneous. Through the work of Gerve et al [9] and in the last decade, especially by M. Scherge and co-workers [10], the role of very thin chemically modified surface layers has been demonstrated for systems with "minimal wear" (including, for example, combustion engines). Further, the Rabinowicz-Molinari criterion uses the notion of "asperity".…”

Section: Introductionmentioning

confidence: 99%

Adhesive Wear: Generalized Rabinowicz’ Criteria

Popov

2018

FU Mech Eng

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Abstract. In a recent paper in Nature Communications, Aghababaei, Warner and Molinari [5] used quasi-molecular simulations to confirm the criterion for formation of debris, proposed in 1958 by Rabinowicz [4]. The work of Aghababaei, Warner and Molinari improves our understanding of adhesive wear but at the same time puts many new questions. The present paper is devoted to the discussion of possible generalizations of the Rabinowicz-Molinari criterion and its application to a variety of systems differing by the interactions in the interface and by the material properties (elastic and elastoplastic) and structure (homogeneous and layered systems). A generalization of the Rabinowicz-Molinari criterion for systems with arbitrary complex contact configuration issuggested which does not use the notion of "asperity".

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“…The involved materials respond by changes in topography (dissipative structures [3], material transfer or film formation), changes in near-surface microstructure, phase transformation and modified chemical composition. Godet coined the term third body in 1984 [4].…”

Section: Introductionmentioning

confidence: 99%

“…Targeting the materials response during running-in, Rigney et al investigated the involved mechanisms leading to changes in near-surface structure and to the introduction of foreign elements as result of intermixing processes [3,[5][6][7]. The third body is the prerequisite for ultra-low wear rates and small coefficients of friction.…”

Section: Introductionmentioning

confidence: 99%

Tribofilms Forming in Oil-Lubricated Contacts

2016

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Abstract:The subject of the present paper is the characterization of third bodies of run-in systems. By means of continuous friction and wear measurement, lubricated steel-steel and steel-aluminum contacts were evaluated. Microstructure, chemical composition and response of the materials to shear were analyzed by XPS/AES and focused ion beam technique. After a proper running-in, both systems developed a third body. The third body differs significantly from the base materials. In addition to adapted microstructure and near-surface chemistry, the third body exhibited a substructure characterized by a near-surface zone that accommodates shear and a second, deeper region that ensures strengthening.

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Fundamental wear mechanism of metals

Cited by 102 publications

References 12 publications

Local mechanical properties of the head articulation cuticle in the beetlePachnoda marginata(Coleoptera, Scarabaeidae)

Local mechanical properties of the head articulation cuticle in the beetlePachnoda marginata(Coleoptera, Scarabaeidae)

Adhesive Wear: Generalized Rabinowicz’ Criteria

Tribofilms Forming in Oil-Lubricated Contacts

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