Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Timo J. Hakala"'
Publikováno v:
Lubricants, Vol 9, Iss 3, p 30 (2021)
Diamond-like carbon (DLC) coatings have proven to be an excellent thin film solution for reducing friction of tribological systems as well as providing resistance to wear. These characteristics yield greater efficiency and longer lifetimes of tribolo
Externí odkaz:
https://doaj.org/article/4e55b16e7f874d1a956ec4bddd974c95
Publikováno v:
Hakala, T J, Laukkanen, A, Suhonen, T & Holmberg, K 2020, ' A finite-element model for a paste lubricated steel wire vs cast iron contact ', Tribology International, vol. 150, 106362 . https://doi.org/10.1016/j.triboint.2020.106362
A finite-element model for a paste lubricated steel wire vs cast iron contact was developed. The modelled contact included two surfaces with engineering topography and a paste lubricant. The paste lubricant consisted of a synthetic transmission oil,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54239204c6fc8ddd1f4fa82d6ae0abb7
https://cris.vtt.fi/en/publications/1c503a67-6c2d-4b93-914a-58ed362cbe08
https://cris.vtt.fi/en/publications/1c503a67-6c2d-4b93-914a-58ed362cbe08
Publikováno v:
Huttunen-Saarivirta, E, Kilpi, L, Hakala, T J, Metsäjoki, J & Ronkainen, H 2018, ' Insights into the behaviour of tool steel-aluminium alloy tribopair at different temperatures ', Tribology International, vol. 119, pp. 567-584 . https://doi.org/10.1016/j.triboint.2017.11.041
Friction and wear of a tribopair: aluminium alloy 6082 and tool steel H13, were studied at room temperature and elevated temperatures corresponding to hot forming of aluminium alloys. At the contact pressure of 510 MPa, abrasive wear of the tool stee
Autor:
Anssi Laukkanen, Kenneth Holmberg, Tomasz Woloszynski, Gwidon Stachowiak, Carsten Gachot, Tomi Suhonen, Hannu Ronkainen, Pawel Podsiadlo, Marcin Wolski, Timo J. Hakala, Lawrence Kwok-Yan Li
Publikováno v:
Holmberg, K, Laukkanen, A, Hakala, T, Ronkainen, H, Suhonen, T, Wolski, M, Podsiadlo, P, Woloszynski, T, Stachowiak, G, Gachot, C & Li, L 2021, ' Topography orientation effects on friction and wear in sliding DLC and steel contacts, part 3: Experiments under dry and lubricated conditions ', Wear, vol. 486-487, 204093 . https://doi.org/10.1016/j.wear.2021.204093
Surface topography can affect the tribological performance in many applications. The influence of surface roughness and topographic orientation on friction and wear in dry and oil lubricated steel vs steel and diamond-like carbon (DLC) coated steel v
Publikováno v:
Huttunen-Saarivirta, E, Heino, V, Vaajoki, A, Hakala, T J & Ronkainen, H 2019, ' Wear of additively manufactured tool steel in contact with aluminium alloy ', Wear, vol. 432-433, 202934 . https://doi.org/10.1016/j.wear.2019.202934
In this work, additively manufactured (AM) tool steel discs were prepared by selective laser melting (SLM) and subjected to pin-on-disc experiments in contact to aluminium alloy pin at various temperatures. The experimental conditions were selected t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9013cf444e28c4c48bc16c7dacb1844
https://cris.vtt.fi/en/publications/06629041-c73c-4b80-975c-e3a0c99b86f5
https://cris.vtt.fi/en/publications/06629041-c73c-4b80-975c-e3a0c99b86f5
Autor:
Nong Gao, Terence G. Langdon, Chuan Ting Wang, Helena Ronkainen, Robert J.K. Wood, Timo J. Hakala, Anssi Laukkanen, Kenneth Holmberg
Publikováno v:
Wang, C T, Hakala, T J, Laukkanen, A, Ronkainen, H, Holmberg, K, Gao, N, Wood, R J K & Langdon, T G 2016, ' An investigation into the effect of substrate on the load-bearing capacity of thin hard coatings ', Journal of Materials Science, vol. 51, no. 9, pp. 4390-4398 . https://doi.org/10.1007/s10853-016-9751-8
TiN and diamond-like carbon (DLC) coatings were deposited on Ti substrates with and without processing by high-pressure torsion (HPT). The HPT processing refined the grain size of titanium from the coarse-grained (CG) size of ~8.6 µm to the ultra-fi
Publikováno v:
Huttunen-Saarivirta, E, Kilpi, L, Hakala, T J, Carpen, L & Ronkainen, H 2016, ' Tribocorrosion study of martensitic and austenitic stainless steels in 0.01 M NaCl solution ', Tribology International, vol. 95, pp. 358-371 . https://doi.org/10.1016/j.triboint.2015.11.046
In this study, types 440B (martensitic) and 304 (austenitic) stainless steel were subjected to microstructural characterisation and a series of tribocorrosion tests in a pin-on-disc facility equipped with a corrosion cell, in order to obtain understa
Autor:
Jarkko Metsäjoki, Jianjun Zhang, Roberto Milani, Mengmeng Deng, Oskari Elomaa, Timo J. Hakala, Niko Granqvist, Feng Li, Géza R. Szilvay
Publikováno v:
Hakala, T J, Metsäjoki, J, Granqvist, N, Milani, R, Szilvay, G R, Elomaa, O, Deng, M, Zhang, J & Li, F 2015, ' Adsorption and lubricating properties of HFBII hydrophobins and diblock copolymer poly(methyl methacrylate-b-sodium acrylate) additives in water-lubricated copper vs. a-C:H contacts ', Tribology International, vol. 90, pp. 60-66 . https://doi.org/10.1016/j.triboint.2015.04.006
In a metal forming process the adhesion between the workpiece and the tool needs to be minimised, which can be achieved by use of lubricants and coatings. Here adsorption and lubrication properties of HFBII hydrophobins and diblock copolymer poly(met
Publikováno v:
Elomaa, O, Singh, V K, Iyer, A, Hakala, T J & Koskinen, J 2015, ' Graphene oxide in water lubrication on diamond-like carbon vs. stainless steel high-load contacts ', Diamond and Related Materials, vol. 52, pp. 43-48 . https://doi.org/10.1016/j.diamond.2014.12.003
The friction and wear performance of 0–2 wt.% graphene oxide (GO) dispersions in water were studied on diamond-like carbon vs. stainless steel contact by a pin-on-disk tribometer. The wear surfaces were characterized using contact profilometry, X-r
Publikováno v:
Shi, Z, Hakala, T J, Metsäjoki, J, Szilvay, G R & Li, F 2017, ' Lubrication of aluminium versus diamond-like carbon contacts with hydrophobin proteins ', Surface Engineering, vol. 33, no. 1, pp. 49-55 . https://doi.org/10.1080/02670844.2015.1114234
Hydrogenated diamond-like carbon coatings (a-C:H) and silicon-doped diamond-like carbon coatings (a-C:H(Si)) of 1 µm thickness were deposited on stainless steel substrates by the inductively coupled plasma chemical vapour deposition technique, inclu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30adb89312644a73befa5b27b9e68a91
https://cris.vtt.fi/en/publications/fe74e0f7-a823-41c2-ab47-b0ac78cc625e
https://cris.vtt.fi/en/publications/fe74e0f7-a823-41c2-ab47-b0ac78cc625e