Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Ken Vidar Falch"'
Publikováno v:
Philosophical Magazine Letters, Vol 104, Iss 1 (2024)
Fusion-based welding and additive manufacturing are two key pillars of manufacturing. Rapidly evolving melt pools are associated with both of these processing approaches. Understanding and controlling the evolution of the melt pools are critical for
Externí odkaz:
https://doaj.org/article/9836ee8d35284a0c87fc54b1d5652fa6
Autor:
Umut T. Sanli, Griffin Rodgers, Marie-Christine Zdora, Peng Qi, Jan Garrevoet, Ken Vidar Falch, Bert Müller, Christian David, Joan Vila-Comamala
Publikováno v:
Light: Science & Applications, Vol 12, Iss 1, Pp 1-8 (2023)
Abstract Achromatic doublets are combinations of two individual lenses designed to focus different wavelengths of light in the same position. Apochromatic optics are improved versions of the achromatic schemes which extend the wavelength range signif
Externí odkaz:
https://doaj.org/article/e8bc0f4ef5a4438cbdd344982853b78f
Autor:
Prerana Chakrabarti, Anna Wildeis, Markus Hartmann, Robert Brandt, Ralph Döhrmann, Giovanni Fevola, Christina Ossig, Michael Elias Stuckelberger, Jan Garrevoet, Ken Vidar Falch, Vanessa Galbierz, Gerald Falkenberg, Peter Modregger
Publikováno v:
Journal of Synchrotron Radiation, Vol 29, Iss 6, Pp 1407-1413 (2022)
X-ray diffraction with high spatial resolution is commonly used to characterize (poly)crystalline samples with, for example, respect to local strain, residual stress, grain boundaries and texture. However, the investigation of highly absorbing sample
Externí odkaz:
https://doaj.org/article/6160692d5bf84585be5db3cf013f94a8
Autor:
Mikhail Lyubomirskiy, Felix Wittwer, Maik Kahnt, Frieder Koch, Adam Kubec, Ken Vidar Falch, Jan Garrevoet, Martin Seyrich, Christian David, Christian G. Schroer
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract Imaging large areas of a sample non-destructively and with high resolution is of great interest for both science and industry. For scanning coherent X-ray diffraction microscopy, i. e., ptychography, the achievable scan area at a given spati
Externí odkaz:
https://doaj.org/article/5a1d22a6bd224738a8b573b3fe0dda55
Publikováno v:
Materials & Design, Vol 190, Iss , Pp - (2020)
The flow within the melt pool during welding is a major factor that dictates the formation of the final fusion zone shape, solidification microstructure and defects. In this paper, we report the evolution sequence of the arc weld pool flow that obser
Externí odkaz:
https://doaj.org/article/381aba5194f04f86a7e86925b0e9a0b2
Autor:
Elena Longo, Domenico Alj, Joost Batenburg, Ombeline de La Rochefoucauld, Charlotte Herzog, Imke Greving, Ying Li, Mikhail Lyubomirskiy, Ken Vidar Falch, Patricia Estrela, Silja Flenner, Nicola Viganò, Marta Fajardo, Philippe Zeitoun
Publikováno v:
Photonics, Vol 9, Iss 2, p 98 (2022)
X-ray computed tomography (CT) is an invaluable technique for generating three-dimensional (3D) images of inert or living specimens. X-ray CT is used in many scientific, industrial, and societal fields. Compared to conventional 2D X-ray imaging, CT r
Externí odkaz:
https://doaj.org/article/8b21952779d948f2ac883f1516725b10
Autor:
David M. Paganin, Carsten Detlefs, Ken Vidar Falch, Ragnvald H. Mathiesen, Magnus Sebastian Christensen
Publikováno v:
'Optics Express ', vol: 27, pages: 20311-20322 (2019)
20311-20322
Optics Express
20311-20322
Optics Express
The beam diffusing properties of stacked layers of diffuser material were evaluated experimentally and compared to a Gaussian random phase screen model. The model was found to give promising accuracy in combination with a Lorentzian auto-correlation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1323739c4bdae36d010c4386248bf719
https://epn-library.esrf.fr/flora/jsp/index_view_direct_anonymous.jsp?record=doc:PUB_ESRF:52958
https://epn-library.esrf.fr/flora/jsp/index_view_direct_anonymous.jsp?record=doc:PUB_ESRF:52958
Autor:
Frank Seiboth, Gerald Falkenberg, Dennis Brückner, Jan Garrevoet, Ken Vidar Falch, Andreas Schropp, Frieder Koch
Publikováno v:
Powder diffraction 35 (S1) (@020), 34-37 (2020). doi:10.1017/S0885715620000536
Powder diffraction 35, 1-4 (2020). doi:10.1017/S0885715620000536
A provisional setup for X-ray microprobe experiments at 35 keV is described. It is based on compoundrefractive lenses (CRLs) for nanofocusing and a Vortex silicon drift detector wi
A provisional setup for X-ray microprobe experiments at 35 keV is described. It is based on compoundrefractive lenses (CRLs) for nanofocusing and a Vortex silicon drift detector wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32000136823f6c575aeaa180a5d0366c
https://bib-pubdb1.desy.de/record/442329
https://bib-pubdb1.desy.de/record/442329
Publikováno v:
Ultramicroscopy. 184:1-7
Analytical expressions for the transmission cross-coefficients for x-ray microscopes based on compound refractive lenses are derived based on Gaussian approximations of the source shape and energy spectrum. The effects of partial coherence, defocus,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23e77190391d5f178319bdd0b8c8d0c1
https://doi.org/10.1016/j.ultramic.2017.09.010
https://doi.org/10.1016/j.ultramic.2017.09.010
Publikováno v:
International Journal of Heat and Mass Transfer. 179:121679
The complex flow within the molten metallic pool, during advanced manufacturing and joining processes such as welding and additive manufacturing, directly affects the performance of the final components; through the generation of various microstructu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e43c01664ec66edae5b7fb3c842c51c
https://doi.org/10.1016/j.ijheatmasstransfer.2021.121679
https://doi.org/10.1016/j.ijheatmasstransfer.2021.121679