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Sliding wear and fatigue cracking damage mechanisms in reciprocal and unidirectional sliding of high-strength steels in dry contact
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics (from 2013).
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics (from 2013).ORCID iD: 0000-0002-9441-2502
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics (from 2013).ORCID iD: 0000-0001-6029-2613
2019 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 444, article id 203119Article in journal (Refereed) Published
Abstract [en]

Rock drill components operate under tough contact conditions during rock drilling. Reciprocal and unidirectional motion under high contact stresses are the common contact conditions between interconnected components. It will result in component damage and often the observed surface damage of rock drill tools is due to wear and fatigue cracks. Nevertheless, the effects of the properties and structure of the mating materials on tribological performance, is not fully understood. The present study is dedicated to simulation and investigation of the wear mechanisms observed in reciprocal and unidirectional sliding of high strength steels for rock drill components. A high strength martensitic steel, 22NiCrMo12–F, commonly used in rock drills was tested in self-mating contact. Wear mechanisms were investigated by means of electron microscopy and wear damage was quantified by a 3D optical interferometer. Total damage, as a result of adhesive wear, severe plastic deformation and nucleation and propagation of fatigue cracks, was discussed in relation to test conditions and material properties. It was observed that the coefficient of friction decreased with increasing normal load. Moreover, the results showed that the type of motion had a significant influence on the worn volume and crack nucleation of the specimens in sliding contact. In addition, the reciprocal motion resulted in higher wear than unidirectional motion under the same test conditions.

Place, publisher, year, edition, pages
Elsevier Ltd , 2019. Vol. 444, article id 203119
Keywords [en]
Fatigue cracks, High strength steel, Reciprocal sliding contact, Rock drill rods, Sliding wear and plastic deformation, Adhesives, Cracks, Fatigue crack propagation, Fatigue damage, Friction, Infill drilling, Nucleation, Plastic deformation, Rock drilling, Rock drills, Rocks, Structural panels, Tribology, Coefficient of frictions, High strength martensitic steels, Optical interferometer, Severe plastic deformations, Sliding contacts, Sliding wear, Tribological performance
National Category
Materials Engineering
Research subject
Materials Engineering
Identifiers
URN: urn:nbn:se:kau:diva-76487DOI: 10.1016/j.wear.2019.203119ISI: 000513001800003Scopus ID: 2-s2.0-85075419083OAI: oai:DiVA.org:kau-76487DiVA, id: diva2:1388105
Available from: 2020-01-23 Created: 2020-01-23 Last updated: 2020-04-01Bibliographically approved

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Mussa, AbdulbasetKrakhmalev, PavelBergström, Jens

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