Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Vilma Ratia"'
Publikováno v:
Tribology Online, Vol 8, Iss 2, Pp 152-161 (2013)
Energy can be saved by enhancing the service life of machinery and by designing lighter units. These design changes enable, for example, lower fuel consumption and larger payloads. The implementation of this kind of solutions, however, requires devel
Externí odkaz:
https://doaj.org/article/9ae16252ced5461a968bf2f09c5b5438
Autor:
Jinshan Pan, Xiaoqi Yue, Per Malmberg, Elisa Isotahdon, Vilma Ratia-Hanby, Elina Huttunen-Saarivirta, Christofer Leygraf
Publikováno v:
Pan, J, Yue, X, Malmberg, P, Isotahdon, E, Ratia-Hanby, V, Huttunen-Saarivirta, E & Leygraf, C 2023, ' Reply to comment on “Penetration of corrosive species into copper exposed to simulated O 2-free groundwater by time-of-flight secondary ion mass spectrometry (ToF-SIMS)” ', Corrosion Science, vol. 217, 111137 . https://doi.org/10.1016/j.corsci.2023.111137
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdfa3112c70a52fe39d0a8e9ede35a8b
https://cris.vtt.fi/en/publications/df4a7957-7175-45d4-a5e8-3f2d88b062aa
https://cris.vtt.fi/en/publications/df4a7957-7175-45d4-a5e8-3f2d88b062aa
Autor:
Xiaoqi Yue, Per Malmberg, Elisa Isotahdon, Vilma Ratia-Hanby, Elina Huttunen-Saarivirta, Christofer Leygraf, Jinshan Pan
Publikováno v:
Yue, X, Malmberg, P, Isotahdon, E, Ratia-Hanby, V, Huttunen-Saarivirta, E, Leygraf, C & Pan, J 2023, ' Penetration of corrosive species into copper exposed to simulated O2-free groundwater by time-of-flight secondary ion mass spectrometry (ToF-SIMS) ', Corrosion Science, vol. 210, no. Part 2, 110833 . https://doi.org/10.1016/j.corsci.2022.110833
ToF-SIMS analysis of copper samples after exposures to simulated groundwater with and without sulfide addition was performed to investigate the penetration of corrosive species containing H, S, O, and Cl, into copper. Depth profiles show extent of pe
Autor:
Jinshan Pan, Alfred Larsson, Cem Örnek, Ulrich Lienert, Vilma Ratia-Hanby, Elisa Isotahdon, Edvin Lundgren, Christofer Leygraf
Publikováno v:
Pan, J, Larsson, A, Örnek, C, Lienert, U, Ratia-Hanby, V, Isotahdon, E, Lundgren, E & Leygraf, C 2022, ' Advanced analysis techniques revealing corrosion inside copper microstructure ', 18th Nordic Corrosion Congress, NCC 20222, Turku, Finland, 31/05/22-2/06/22 pp. 12 .
VTT Technical Research Centre of Finland-PURE
VTT Technical Research Centre of Finland-PURE
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a18155036cb87da9a4a62a3c599cfa7f
https://cris.vtt.fi/en/publications/83ca0349-caab-4b95-a8e9-9b8cd938a253
https://cris.vtt.fi/en/publications/83ca0349-caab-4b95-a8e9-9b8cd938a253
Autor:
Xiaoqi Yue, Per Malmberg, Elisa Isotahdon, Vilma Ratia, Elina Huttunen-Saarivirta, Christofer Leygraf, Jinshan Pan
Publikováno v:
SSRN Electronic Journal.
Autor:
Veli-Tapani Kuokkala, Juuso Terva, Marian Apostol, Karthik Ram Ramakrishnan, Vilma Ratia, Kati Valtonen
Publikováno v:
Valtonen, K, Ratia, V, Ramakrishnan, K R, Apostol, M, Terva, J & Kuokkala, V-T 2019, ' Impact wear and mechanical behavior of steels at subzero temperatures ', Tribology International, vol. 129, pp. 476-493 . https://doi.org/10.1016/j.triboint.2018.08.016
In this study, the deformation behavior of three steels was studied at Arctic temperatures by controlled single and multiple oblique angle impacts. The results were compared with the mechanical properties of the steels determined at the corresponding
Autor:
Leena Carpén, Fan Zhang, Cem Örnek, Timo Müller, M. Liu, Jinshan Pan, Vilma Ratia-Hanby, Elisa Isotahdon, Ulrich Lienert
Publikováno v:
Corrosion science 184, 109390 (2021). doi:10.1016/j.corsci.2021.109390
Zhang, F, Örnek, C, Liu, M, Müller, T, Lienert, U, Ratia-Hanby, V, Carpén, L, Isotahdon, E & Pan, J 2021, ' Corrosion-induced microstructure degradation of copper in sulfide-containing simulated anoxic groundwater studied by synchrotron high-energy X-ray diffraction and ab-initio density functional theory calculation ', Corrosion Science, vol. 184, 109390 . https://doi.org/10.1016/j.corsci.2021.109390
Zhang, F, Örnek, C, Liu, M, Müller, T, Lienert, U, Ratia-Hanby, V, Carpén, L, Isotahdon, E & Pan, J 2021, ' Corrosion-induced microstructure degradation of copper in sulfide-containing simulated anoxic groundwater studied by synchrotron high-energy X-ray diffraction and ab-initio density functional theory calculation ', Corrosion Science, vol. 184, 109390 . https://doi.org/10.1016/j.corsci.2021.109390
Corrosion science 184, 109390 (2021). doi:10.1016/j.corsci.2021.109390
Synchrotron high-energy XRD measurements and ab-initio DFT calculations were employed to investigate microstructural degradation of copper upon exposure to sulfide-containing
Synchrotron high-energy XRD measurements and ab-initio DFT calculations were employed to investigate microstructural degradation of copper upon exposure to sulfide-containing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dff1ed9d0c0ddec9c0d23dd0020c079
https://bib-pubdb1.desy.de/record/456543
https://bib-pubdb1.desy.de/record/456543
Publikováno v:
Tampere University
Tribologia-Finnish Journal of Tribology
Valtonen, K, Ratia, V & Kuokkala, V-T 2019, ' Research methods for the evaluation of the relevance of application oriented laboratory wear tests ', Tribologia, vol. 36, no. 1-2, pp. 46−53 . https://doi.org/10.30678/fjt.82438
Tribologia-Finnish Journal of Tribology
Valtonen, K, Ratia, V & Kuokkala, V-T 2019, ' Research methods for the evaluation of the relevance of application oriented laboratory wear tests ', Tribologia, vol. 36, no. 1-2, pp. 46−53 . https://doi.org/10.30678/fjt.82438
In this work, different research methods and test procedures were examined and compared in order to have a better understanding of the relevance of various application oriented laboratory wear tests relative to the in-service performance of the steel
Publikováno v:
Materials & Design, Vol 164, Iss, Pp-(2019)
Carrington, M J, Daure, J, Ratia, V L, Shipway, P H, McCartney, D G & Stewart, D A 2019, ' Microstructural characterisation of Tristelle 5183 (Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt%) alloy powder produced by gas atomisation ', Materials and Design, vol. 164, 107548 . https://doi.org/10.1016/j.matdes.2018.107548
Carrington, M J, Daure, J, Ratia, V L, Shipway, P H, McCartney, D G & Stewart, D A 2019, ' Microstructural characterisation of Tristelle 5183 (Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt%) alloy powder produced by gas atomisation ', Materials and Design, vol. 164, 107548 . https://doi.org/10.1016/j.matdes.2018.107548
Nitrogen gas atomised powders of the hardfacing alloy Tristelle 5183 (Fe-21%Cr-10%Ni-7%Nb-5%Si-2%C in wt%) were sieved into different particle size ranges and their microstructures have been investigated. Powder particles larger than approximately 53
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1f1ea199a55026bdec653585d74af50
Autor:
Anssi Laukkanen, Vilma Ratia, Wolfgang Molnar, Matti Lindroos, Kenneth Holmberg, Kati Valtonen, Marian Apostol, Veli-Tapani Kuokkala
Publikováno v:
Lindroos, M, Ratia, V, Apostol, M, Valtonen, K, Laukkanen, A, Molnar, W, Holmberg, K & Kuokkala, V-T 2015, ' The effect of impact conditions on the wear and deformation behavior of wear resistant steels ', Wear, vol. 328-329, pp. 197-205 . https://doi.org/10.1016/j.wear.2015.02.032
The deformation and wear behavior of four high strength wear resistant steels were studied in various impact conditions to evaluate their performance in applications involving heavy impacts and impact-abrasion. In the normal direction impacts, the st