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- Almqvist, Andreas, et al.
(författare)
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Selected papers from those presented at the 3rd International Tribology Symposium of IFToMM
- 2014
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Ingår i: Lubrication Science. - : Wiley. - 0954-0075 .- 1557-6833. ; 26:5, s. 273-275
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Selected papers presented at the 3rd International Tribology Symposium of the International Federation for the Promotion of Mechanism and Machine Science (IFToMM) are discussed. The 3rd International Tribology Symposium of IFToMM was organized by the Division of Machine Elements of Luleå University of Technology in Sweden from March 19 21, 2013. The symposium was held in the university campus, providing a perfect forum for the tribologists for presenting their latest research and exchange of ideas. The participants were also given the opportunity to experience the snowy landscape during a memorable outdoor dinner. The symposium attracted 146 participants from 26 countries along with 92 papers spread over 32 sessions. These papers covered the fundamental and applied aspects of wide ranging topics such as friction, wear, lubrication, lubricants, tribology in hostile environment, tribomaterials, solid lubricants, surface engineering, and tribotesting.
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- Efeoglu, Ihsan, et al.
(författare)
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Interfacial scratch adhesion behavior of multilayered Ti(BN):Ti(MoS2) based PVD coatings
- 2009
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Interfacial adhesion is critical property of multilayered thin films used in micro-electromechanical systems, ceramic capacitors, wear resistant coatings. In the present investigation, Ti(BN)+Ti(MoS2) solid multilayered composite solid lubricant coatings were deposited by magnetron sputtering from separate Ti, TiB2, and MoS2 target. X-ray diffraction, microhardness tester, and scratch tester were used to evaluate structural, mechanical and interfacial adhesion properties. In the work, described here changes in the adhesion of intercoat exhibited by nine different coatings deposited under variants of deposition parameters have been investigated. It is found that the crack propagates alternatively between the two interfaces with thinning of the interlayer.
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| 8. |
- Gebretsadik, Daniel, et al.
(författare)
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Embeddability behaviour of some Pb-free engine bearing materials
- 2016
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- An important requirement on engine bearing materials is its ability to embed dirt/abrasive particles onto the bearing surface and minimize damage to the expensive crankshaft. This property is achieved by applying an overlay onto the lining. In this work, a journal bearing test rig that operates under steady loading condition has been employed to investigate the embeddability behaviour of selected multi-layered Pb-free engine bearing materials in the presence of contaminant/abrasive particles in engine oil. Test materials include Pb-free bearing materials with overlay compositions of Sn, Bi, PAI containing MoS2 and graphite. Pb-based overlay has also been studied as a reference. Embeddability behaviour in terms of wear and changes in surface topography has been investigated. The damage on the shaft and the bearing surfaces were studied in order to elucidate the mechanisms involved. It has been possible to distinguish between the embeddability characteristics of different materials.
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- Gebretsadik, Daniel, et al.
(författare)
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Investigations into Seizure Behaviour of Pb-free Engine Bearing Materials Under Dry Condition
- 2015
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Due to new environmental regulations, Pb-free engine bearing materials are becoming more common and there is a need for studying their tribological performance. Under severe and nonideal operating conditions, failure due to seizure can occur in engine bearings. In this work, seizure behaviour of different multi-layered engine bearing materials has been studied by using a block-on-ring test set up. These materials included Al-Sn based lining with no overlay, bronze lining with Polyamide-imide (PAI) based overlay containing MoS2 and graphite, bronze lining with two overlays of Al-Sn based and PAI based overlay, bronze based lining with Sn-based overlay and bismuth (Bi) containing bronze with Sn-based overlay. Tests were performed by progressively increasing the load in a stepwise manner at a constant speed under unidirectional dry sliding conditions. Bronze based lining with a PAI based overlay containing MoS2 and graphite did not exhibit seizure up to a load of 475 N. For Al-Sn based lining without overlay, seizure occurs at relatively lower load of 125 N. In most cases, there is material transfer onto the counter surface test ring. The test materials, counter surfaces and the wear debris were analysed using SEM incorporating EDS with a view to explain the seizure mechanisms.
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