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15 results on '"Bieda M"'

2. Titania coating formation on hydrostatically extruded pure titanium by micro-arc oxidation method

Author

Maj, Ł., primary, Wojtas, D., additional, Jarzębska, A., additional, Bieda, M., additional, Trembecka-Wójciga, K., additional, Chulist, R., additional, Kozioł, W., additional, Góral, A., additional, Trelka, A., additional, Janus, K., additional, Kawałko, J., additional, Kulczyk, M., additional, Muhaffel, F., additional, Çimenoğlu, H., additional, and Sztwiertnia, K., additional

Published
2022
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3. Ribs of Pinna nobilis shell induce unexpected microstructural changes that provide unique mechanical properties

Author

Ministerio de Ciencia e Innovación (España), Polish National Agency for Academic Exchange, National Science Centre (Poland), Nalepka, K., Berent, K., Checa, Antonio G., Machniewicz, Tomasz, Harris, Adrian J., Nalepka, Paweł, Strąg, Martyna, Maj, Łukasz, Szkudlarek, Aleksandra, Bieda, M., Sztwiertnia, K., Ministerio de Ciencia e Innovación (España), Polish National Agency for Academic Exchange, National Science Centre (Poland), Nalepka, K., Berent, K., Checa, Antonio G., Machniewicz, Tomasz, Harris, Adrian J., Nalepka, Paweł, Strąg, Martyna, Maj, Łukasz, Szkudlarek, Aleksandra, Bieda, M., and Sztwiertnia, K.

Abstract

The reinforcement function of shell ribs depends not only on their vaulted morphology but also on their microstructure. They are part of the outer layer which, in the case of the Pinna nobilis bivalve, is built from almost monocrystalline calcitic prisms, always oriented perpendicular to the growth surfaces. Originally, prisms and their c-axes follow the radii of rib curvature, becoming oblique to the shell thickness direction. Later, prisms bend to reach the nacre layer perpendicularly, but their c-axes retain the initial orientation. Calcite grains form nonrandom boundaries. Most often, three twin disorientations arise, with two of them observed for the first time. Nano-indentation and impact tests demonstrate that the oblique orientation of c-axes significantly improves the hardness and fracture toughness of prisms. Moreover, compression tests reveal that the rib area achieves a unique strength of 700 MPa. The detection of the specific microstructure formed to toughen the shell is novel.

Published
2022

5. Misorientation characteristics of interphase boundaries in Pinctada margaritifera shell

Author

European Commission, Ministerio de Ciencia e Innovación (España), Strag, M., Bieda, M., Jarzebska, L., Maj, M., Berent, K., Nalepka, K., Checa, Antonio G., Sztwiertnia, K., European Commission, Ministerio de Ciencia e Innovación (España), Strag, M., Bieda, M., Jarzebska, L., Maj, M., Berent, K., Nalepka, K., Checa, Antonio G., and Sztwiertnia, K.

Abstract

Microstructure studies of various classes of materials show the presence of a strictly defined order. The basic structural elements, crystallites of the same or different phases, strive to determine the state with the smallest free energy. This leads to a special mutual misorientation of the neighboring grains. In the frame of the research electron backscatter diffraction in scanning electron microscope was used to characterize the crystallographic relationships in calcitic prismatic lamellas forming the outside part of the shell of Pinctada margaritifera. Occurrence of boundaries with specific orientation relationship, preferred by a given material was confirmed. © 2019 Elsevier B.V.

Published
2019

7. Laser induced breakdown spectroscopy as diagnostics for fuel retention and removal and wall composition in fusion reactors with mixed-material components

Author

Gasior, P., Bieda, M., Kubkowska, M., Neu, R., Wolowski, J., ASDEX Upgrade Team, and ASDEX Upgrade Team

Subjects
Laser ablation, Materials science, Thin layers, Hydrogen, Mechanical Engineering, Nuclear engineering, chemistry.chemical_element, Nanotechnology, Fusion power, Nuclear Energy and Engineering, chemistry, ASDEX Upgrade, General Materials Science, Laser-induced breakdown spectroscopy, Beryllium, Spectroscopy, Civil and Structural Engineering
Abstract

In order to apply Laser Induced Breakdown Spectroscopy (LIBS) for diagnostics of fuel retention and removal and wall composition in ITER it is necessary to validate the method in terms of repeatability and quality of its results for mixed, especially ITER relevant materials and its sensitivity to thin layers which contain small amounts of retained fuel. The experiments, which are within the scope of this paper were carried out at the IPPLM Warsaw to assess the method for the laser treatment of ASDEX Upgrade (AUG) strike-point tiles and calibrated C:W:Al samples prepared by the Institute of Electronic Materials Technology (IEMT). The samples under investigation contained hydrogen isotopes in the ITER-relevant mixed material layer (as the Beryllium analogue, Al was used). An electrostatic ion energy analyzer was used as the auxiliary diagnostics. The results proved that optical spectroscopy, although not straightforward in use, can give reliable results even for small amounts of fuel present in the mixed-material layer, although more effort should be put into investigating calibrated samples, to optimize the method itself and to yield a quantitative measure of fuel retention.

Published
2011
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13. “Air bubble artefact”: a new type of artefact on CT head examination

Author

McVey, S., primary, Kanodia, A.K., additional, Dundas, S., additional, Main, G., additional, Pillai, S., additional, Prasad, G., additional, Flinn, J., additional, Zealley, I., additional, Brauer, K., additional, Schembri, N., additional, Docherty, S., additional, Webster, A., additional, Szewczyk-Bieda, M., additional, and Sudarshan, T., additional

Published
2016
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14. EP-1342: Risk of local failure with Cyberknife radiosurgery to the resection bed for large intracranial metastases

Author

Vogel, J., primary, Hollander, A., additional, Ojerholm, E., additional, Briola, C., additional, Mooij, R., additional, Bieda, M., additional, Kolker, J.D., additional, Nagda, S., additional, Geiger, G.A., additional, Dorsey, J.F., additional, Lustig, R.A., additional, O'Rourke, D.M., additional, Brem, S., additional, Lee, J.Y.K., additional, and Alonso-Basanta, M., additional

Published
2015
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