Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Frans Nilsén"'
Autor:
Denys Musiienko, Frans Nilsén, Andrew Armstrong, Michal Rameš, Petr Veřtát, Ross H. Colman, Jaroslav Čapek, Peter Müllner, Oleg Heczko, Ladislav Straka
Publikováno v:
Journal of Materials Research and Technology, Vol 14, Iss , Pp 1934-1944 (2021)
Low twinning stress (TS) is a prerequisite for magnetic shape memory functionality in ferromagnetic martensites. We compare Ni50Mn28Ga22 (nominal at.%) single crystals from four different producers to reveal the effect of crystal quality on the TS. N
Externí odkaz:
https://doaj.org/article/b2abd6c2412f4778bc3dd54ca4a0d0ae
Autor:
R. H. Colman, Peter Müllner, Ladislav Straka, Tomáš Kmječ, Andrew Armstrong, Oleg Heczko, Michal Rameš, Petr Veřtát, Frans Nilsén
Publikováno v:
Shape Memory and Superelasticity. 6:97-106
Here we report a systematic research on effects of Fe and Cu upon properties relevant for the magnetic shape memory effect of Ni–Mn–Ga ferromagnetic shape memory alloys. Fe and Cu were identified as elements with potential synergism to increase t
Autor:
Mika Salmi, Iñigo Flores Ituarte, Venkata Karthik Nadimpalli, Simo-Pekka Hannula, Frans Nilsén, Joonas Lehtonen
Publikováno v:
Ituarte, I F, Nilsén, F, Nadimpalli, V K, Salmi, M, Lehtonen, J & Hannula, S-P 2022, ' Towards the additive manufacturing of Ni-Mn-Ga complex devices with magnetic field induced strain ', Additive Manufacturing, vol. 49, 102485 . https://doi.org/10.1016/j.addma.2021.102485
Funding Information: We gratefully acknowledge the support of the Aalto University seed funding for the DEMINFUN-project ( 974110 ). Frans Nilsén also acknowledges (in part) support by Operational Program Research, Development and Education financed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db554571870c756f1be0a5440bbb68ef
https://orbit.dtu.dk/en/publications/fe1a9686-9ea0-400d-b5d9-e6085b65ccdc
https://orbit.dtu.dk/en/publications/fe1a9686-9ea0-400d-b5d9-e6085b65ccdc
Autor:
Frans Nilsén, Michal Rameš, Ladislav Straka, Oleg Heczko, Andrew Armstrong, Peter Müllner, Denys Musiienko, R. H. Colman
Publikováno v:
SSRN Electronic Journal.
We investigate experimentally the universality of the temperature dependences of twinning stress of type Ⅰ and type Ⅱ twins in Ni50Mn28Ga22 five-layered modulated martensite. Single crystals from different producers are compared to distinguish th
Publikováno v:
SCRIPTA MATERIALIA. 139:148-151
A new approach for the processing of porous crystalline Ni-Mn-Ga compacts by spark plasma sintering (SPS) from a mixture of gas atomized Ni-Mn-Ga and NaCl powders (25/75 vol%) is reported. The NaCl was removed to reveal a highly porous skeleton of Ni
Publikováno v:
Nilsén, F, Ituarte, I F, Salmi, M, Partanen, J & Hannula, S-P 2019, ' Effect of process parameters on non-modulated Ni-Mn-Ga alloy manufactured using powder bed fusion ', Additive Manufacturing, vol. 28, pp. 464-474 . https://doi.org/10.1016/j.addma.2019.05.029
Increasingly, metal parts made by additive manufacturing are produced using powder bed fusion (PBF). In this paper we report upon the combined effects of PBF parameters, including power and scan speed, in layer-by-layer manufacturing of gas atomized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2eef96ee1d55336e6e656a2462f9be20
https://vbn.aau.dk/da/publications/ed31f3d4-a329-4757-ac07-ec4783d8682d
https://vbn.aau.dk/da/publications/ed31f3d4-a329-4757-ac07-ec4783d8682d
Publikováno v:
Journal of Materials Science. 51:7322-7335
Anatase TiO2 nanoparticles were synthesized from sol–gel processing, and they were used as a precursor for titanate nanotubes (TNT) formation. TNT were synthesized under reflux heating of anatase TiO2 in concentrated NaOH solution followed by repea
Autor:
Ryuji Maki, Simo-Pekka Hannula, Mika Lahelin, Outi Söderberg, Illya Glavastkyy, Yanling Ge, Ilkka Aaltio, Frans Nilsén
Publikováno v:
Journal of Alloys and Compounds. 656:408-415
Two double dispersion composites were prepared by pulsed electric current sintering (PECS) from two powders on Ni–Mn–Ga–Co/WC–Co system. Composite 1 consists of 90 vol% WC–12Co and 10 vol% of non-modulated Ni–Mn–Ga–Co martensite and C
Magnetically controlled hybrid Ni-Mn-Ga composites are potential candidates for actuation and damping applications. The combination of ductile polymer and gas atomized large grained Ni-Mn-Ga powder has many advantages compared to bulk single crystals
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b08a84d9622c5fcd18653130d84a4ede
https://aaltodoc.aalto.fi/handle/123456789/37102
https://aaltodoc.aalto.fi/handle/123456789/37102
Publikováno v:
Nilsén, F, Aaltio, I, Ge, Y, Lindroos, T & Hannula, S P 2015, ' Characterization of Gas Atomized Ni-Mn-Ga Powders ', Materials Today: Proceedings, vol. 2, no. Supplement 3, pp. S879-S882 . https://doi.org/10.1016/j.matpr.2015.07.422
Gas atomization is a well-known process for obtaining high quality metallic powders. It produces spherical high-density particles with a controllable particle size distribution. We used gas atomization to obtain two different Ni-Mn-Ga powders and inv