Role of wear particles in severe–mild wear transition

Hiratsuka, K.; Muramoto, Kenichi

doi:10.1016/j.wear.2005.02.102

Cited by 92 publications

(35 citation statements)

References 7 publications

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“…The thickness of the surface oxide layer was only of the order 500nm (estimated from SIMS analysis) and thus the oxidation and subsequent formation of the interfacial tribo-film was dependent solely on the asperity flash temperature rise, a further reason the transition point (from contact potential measurements) was not observed. This work is therefore in good agreement with numerous studies which show that when wear debris is retained with the contact, wear rates are generally lower [9,10,[12][13][14][15]17,22,25] whilst conversely for contacts where wear debris is removed from the system, (either by a geometric configuration such that gravity ensures wear debris particles drop out or by mechanical removal with a brush or high pressure jet of air) wear rates increase significantly [22,26].…”

Section: Room Temperature Testssupporting

confidence: 90%

Fe nano-particle coatings for high temperature wear resistance

Walker¹,

Saranu

Kean

et al. 2011

Wear

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Oxidational wear continues to present an economic challenge for the replacement of components subject to high temperature fretting and sliding contacts in applications such as gas turbine engines. At elevated temperatures, low friction oxide 'glaze' layers can form and act as an interface between the contact and the substrate material. Whilst desirable, the glaze is formed from wear debris and often consumes the underlying substrate material. In order to induce rapid formation of low friction oxide layers without a severe 'running-in' period, nano particles of Fe in the range 5-10nm were deposited on ground flat ended pin and plate 080M40 substrates using a terminated gas condensation PVD process, to a thickness of 600nm.Coatings were tested in a reciprocating geometry at a fixed stroke length of 0.4mm, frequency of 31Hz and 40N normal load (1MPa contact stress) and at ambient, 300°C and 540°C. At ambient temperature the coated surfaces exhibited higher friction but lower wear compared to the uncoated substrates, whereas at elevated temperatures, the coated surfaces exhibited slightly lower steady state dynamic friction coefficients, and minimal changes in wear depth after a short incubation period. SEM of the worn surfaces indicated that hard oxide plateaus were responsible for the load bearing contact area at elevated temperatures. Cross sectional FIB, TEM and SIMS confirmed that at elevated temperatures, the nano-particle coating induced rapid formation of a nano-crystalline porous surface oxide film of mixed composition which protected the substrate from severe wear during the running-in period.

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Section: Room Temperature Testssupporting

confidence: 90%

Fe nano-particle coatings for high temperature wear resistance

Walker¹,

Saranu

Kean

et al. 2011

Wear

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“…On the other hand, oxide scale may also decrease metal-on-metal contact during the relative sliding motion of the metallic parts, thus protecting them against wear [13]. Some researchers [14][15][16][17][18][19] have found that the oxides, whether they were generated during the sliding test or introduced by external methods, may form a tribofilm on steel surfaces which rub together.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cr-Rich Oxide Scale on Sliding Wear Mechanism of Ferritic Stainless Steel at High Temperature

et al. 2016

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L. (2016). Influence of Cr-Rich oxide scale on sliding wear mechanism of ferritic stainless steel at high temperature. Tribology Letters, 63 (2), 1-13.Influence of Cr-Rich oxide scale on sliding wear mechanism of ferritic stainless steel at high temperature AbstractThe tribological tests of a ferritic stainless steel (FSS) 445 in contact with high-speed steel (HSS) were performed on a high-temperature pin-on-disc tribometer. Wear exhibited significant difference when the FSS 445 was oxidised with a Cr-rich oxide scale on the surface. The HSS pin displayed adhesive wear when there was no oxide scale on the stainless steel disc, and in the early stages, the coefficient of friction fluctuated significantly, but the level of wear changed as Cr2O3 particles formed. The wear was then reduced, and the coefficient of friction remained stable. The Cr-rich oxide scale which formed on the stainless steel was able to stabilise the coefficient of friction, to reduce the wear rate and to help form a glazed layer on the HSS surface. The abrasive wear of the HSS pin took place at 850 °C, indicating that the hardness of the Cr-rich oxide scale increased as the temperature decreased. AbstractThe tribological tests of a ferritic stainless steel (FSS) 445 in contact with high speed steel (HSS)were performed on a high temperature pin-on-disc tribometer. Wear exhibited significant difference when the FSS 445 was oxidised with a Cr-rich oxide scale on the surface. The HSS pin displayed adhesive wear when there was no oxide scale on the stainless steel disc and in the early stages, the coefficient of friction fluctuated significantly but the level of wear changed as Cr 2 O 3 particles formed. The wear was then reduced and the coefficient of friction remained stable. The Cr-rich oxide scale which formed on the stainless steel was able to stabilize the coefficient of friction, to reduce the wear rate and to help form a glazed layer on the HSS surface. The abrasive wear of the HSS pin took place at 850 °C, indicating that the hardness of the Cr-rich oxide scale increased as the temperature decreased.

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“…23) Moreover, the adherence of the oxidized wear particles to the sliding surfaces yields compacted, protective oxide films, which also reduce the wear rate. 24) Thus the specimen with 6 ppm magnesium possessed the better wear resistance than that without magnesium.…”

Section: Worn Surfacementioning

confidence: 92%

Effects of Magnesium on Wear Resistance of H13 Steel

Wang

Ning

et al. 2014

Mater. Trans.

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Effects of magnesium on wear resistance of H13 steel have been investigated. A disc-on-disc configuration with load of 200 N was employed to study the wear behavior. In order to understand wear mechanisms, wear tracks were studied by scanning electron microscopy. The experimental results show that after magnesium treatment finer carbides were precipitated and the hardness increased with the increasing of magnesium content, which can improve the wear resistance. The specimen without magnesium treatment has the lowest wear resistance and the mode of wear is adhesive. With increase of magnesium content, the degree of oxide patches coverage increased result in the wear rate decreased gradually. Wear mechanism has been changed from adhesive to oxidative after the magnesium content increased to 10 ppm. In this case, the friction coefficient exhibits a higher fluctuation resulted from the alternative formation and delamination of oxide layers.

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Role of wear particles in severe–mild wear transition

Cited by 92 publications

References 7 publications

Fe nano-particle coatings for high temperature wear resistance

Fe nano-particle coatings for high temperature wear resistance

Influence of Cr-Rich Oxide Scale on Sliding Wear Mechanism of Ferritic Stainless Steel at High Temperature

Effects of Magnesium on Wear Resistance of H13 Steel

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