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Przejdź do strony domowej biblioteki Pedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaPedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie
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Wyświetlanie 1-10 z 269
Tytuł:
Microstructure and Mechanical Properties of AA1050/ AA6061/AA1050 Multi-Layer Sheet Fabricated by Cold Roll Bonding Process
Autorzy:
Lee, S.-H.
Tematy:
cold roll bonding process
AA1050/AA6061/AA1050 complex sheet
mechanical properties
electron backscatter diffraction
microstructure
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/353150.pdf  Link otwiera się w nowym oknie
Opis:
A cold roll-bonding process was applied to fabricate an AA1050/AA6061/AA1050 multi-layer sheet. Three Al sheets in which an AA6061 sheet is inserted inside two AA1050 sheets of 2 mm thickness, 40 mm width and 300 mm length were stacked up after surface treatment, and the material was then reduced to a thickness of 1.0 mm by multi-pass cold rolling. The AA1050/AA6061/AA1050 laminate complex sheet fabricated by roll bonding was then hardened by a natural aging (T4) and an artificial aging (T6) treatments. The microstructures of the as-roll bonded and the age-hardened Al complex sheets were revealed by optical microscope and electron back scatter diffraction analysis, and the mechanical properties were investigated by tensile and hardness testing. The strength of the as-roll bonded complex sheet was found to increase by 2.6 times, compared to that value of the starting material. Both AA1050 and AA6061 showed a typical recrystallization structure in which the grains were equiaxed after heat treatment. However, the grain size was smaller in AA6061 than in AA1050.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect Of Compaction Pressure And Sintering Temperature On The Liquid Phase Sintering Behavior Of Al-Cu-Zn Alloy
Wpływ ciśnienia prasowania i temperatury spiekania na spiekanie stopu Al-Cu-Zn z udziałem fazy ciekłej
Autorzy:
Lee, S. H.
Ahn, B.
Tematy:
powder metallurgy
liquid phase sintering
compaction pressure
Al-Cu-Zn alloy
metalurgia proszków
spiekanie w fazie ciekłej
ciśnienie prasowania
stop Al-Cu-Zn
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/351836.pdf  Link otwiera się w nowym oknie
Opis:
The liquid phase sintering characteristics of Al-Cu-Zn alloy were investigated with respect to various powder metallurgy processing conditions. Powders of each alloying elements were blended to form Al-6Cu-5Zn composition and compacted with pressures of 200, 400, and 600 MPa. The sintering process was performed at various temperatures of 410, 560, and 615°C in N2 gas atmosphere. Density and micro-Vickers hardness measurements were conducted at different processing stages, and transverse rupture strength of sintered materials was examined for each condition, respectively. The microstructure was characterized using optical microscope and scanning electron microscopy. The effect of Zn addition on the liquid phase sintering behavior during P/M process of the Al-Cu-Zn alloy was also discussed in detail.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication And Mechanical Properties Of A Nanostructured Complex Aluminum Alloy By Three-Layer Stack Accumulative Roll-Bonding
Wytwarzanie i właściwości mechaniczne nanostrukturalnego złożonego stopu aluminium wytworzonego przez walcowanie pakietowe trzech warstw
Autorzy:
Lee, S. H.
Lee, S. R.
Tematy:
accumulative roll-bonding (ARB)
aluminum alloy
microstructre
mechanical properties
akumulacyjne walcowanie pakietowe
stop aluminium
mikrostruktura
właściwości mechaniczne
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/351499.pdf  Link otwiera się w nowym oknie
Opis:
A multi-layered complex aluminum alloy was successfully fabricated by three-layer stack accumulative roll bonding(ARB) process. The ARB using AA1050 and AA5052 alloy sheets was performed up to 7 cycles at ambient temperature without lubrication. The specimen processed by the ARB showed a multi-layer aluminum alloy sheet in which two aluminum alloys are alternately stacked. The grain size of the specimen decreased with the number of ARB cycles, became about 350nm in diameter after 7cycles. The tensile strength increased with the number of ARB cycles, after 6c it reached 281MPa which is about twice higher than that of the starting material. The microstructures and mechanical properties of a three-layer AA1050/AA5052 alloy fabricated by the ARB were compared to those of the conventional ARB-processed material.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of patterns on image-based modelling of texture-less objects
Autorzy:
Hafeez, J.
Jeon, H.-J.
Hamacher, A.
Kwon, S.-C.
Lee, S.-H.
Tematy:
structure-from-motion
feature detection
patterns analysis
3D reconstruction
surface comparison
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/221814.pdf  Link otwiera się w nowym oknie
Opis:
The task of generating fast and accurate three-dimensional (3D) models of objects or scenes through a sequence of non-calibrated images is an active field of research. The recent development in algorithm optimization has resulted in many automatic solutions that can provide an accurate 3D model from texture-full objects. Structure-from-motion (SfM) is an image-based method that uses discriminative point-based feature identifier, such as SIFT, to locate feature points in the images. This method faces difficulties when presented with the objects made of homogenous or texture-less surfaces. To reconstruct such surfaces a well-known technique is to apply an artificial variety by covering the surface with a random texture pattern prior to the image capturing process. In this work, we designed three series of image patterns which are tested based on the contrast and density ratio which increases from the first to the last pattern within the same series. The performance of the patterns is evaluated by reconstructing the surface of a texture-less object and comparing it with the true data. Using the best-found patterns from the experiments, a 3D model of a Moai statue is reconstructed. The experimental results demonstrate that the density and structure of a pattern highly affects the quality of the reconstruction.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of Mo-Si-B Intermetallic Compound Powders Under Different Heat Treatment Conditions
Autorzy:
Park, J. H.
Lee, S.
Kim, D.
Kim, Y.
Yang, S. H.
Lee, S. H.
Tematy:
Mo-Si-B alloys
intermetallic compounds
reitveld refinement
T2 phase
A15 phase
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/353369.pdf  Link otwiera się w nowym oknie
Opis:
In this research, we investigated the effects of reduction atmospheres on the creation of the Mo-Si-B intermetallic compounds (IMC) during the heat treatments. For outstanding anti-oxidation and elevated mechanical strength at the ultrahigh temperature, we fabricated the uniformly dispersed IMC powders such as Mo5SiB2 (T2) and Mo3Si (A15) phases using the two steps of chemical reactions. Especially, in the second procedure, we studied the influence of the atmospheres (e.g. vacuum, argon, and hydrogen) on the synthesis of IMCs during the reduction. Furthermore, the newly produced IMCs were observed by SEM, XRD, and EDS to identify the phase of the compounds. We also calculated an amount of IMCs in the reduced powders depending on the atmosphere using the Reitveld refinement method. Consequently, it is found that hydrogen atmosphere was suitable for fabrication of IMC without other IMC phases.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics Of The Porous Body Sintered By Nano-Sized Fe-Cr-Al Alloy Powder
Charakterystyka porowatego korpusu spiekanego z nanometrycznego proszku stopu Fe-Cr-Al
Autorzy:
Lee, S.-I.
Lee, S.-H.
Gu, B.-U.
Lee, D.-W.
Kim, B.-K.
Tematy:
Fe-Cr-Al powder
metallic sponges
sintering temperature
oxidation resistance
proszek Fe-Cr-Al
proszek nanometryczny
temperatura spiekania
odporność na utlenianie
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/356635.pdf  Link otwiera się w nowym oknie
Opis:
Porous metal with uniform honeycomb structure was successfully produced by sintering using Fe-Cr-Al nano powder, which was prepared by the pulsed wire evaporation (PWE) in ethanol. Its process consisted of the several steps; 1) coating on the surface of polyurethane sponge with the liquid droplets generated from the ethanol-based slurry where the Fe-Cr-Al nano powders were uniformly dispersed, 2) heat treatment of debinding to remove the polyurethane sponge and 3) sintering of the porous green body formed by Fe-Cr-Al nano powders. The strut thickness of porous Fe-Cr-Al was increased by the increase of spraying times in ESP step. Also, The shrinkages and the oxidation resistance of the sintered porous body was increased with increase of sintering temperature. The optimal sintering temperature was shown to 1450°C in views to maximize the oxidation resistance and sinterability.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Characterization of CoCrFeNiMn High Entropy Alloy Powder Processed by Gas Atomization
Autorzy:
Park, T. G.
Lee, S. H.
Lee, B.
Cho, H. M.
Choi, W. J.
Kim, B. S.
Shin, K. S.
Kim, T.-S.
Tematy:
high entropy alloy
gas atomization
spark plasma sintering
CoCrFeNiMn
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/353649.pdf  Link otwiera się w nowym oknie
Opis:
In this study, precisely controlled large scale gas atomization process was applied to produce spherical and uniform shaped high entropy alloy powder. The gas atomization process was carried out to fabricate CoCrFeNiMn alloy, which was studied for high ductility and mechanical properties at low temperatures. It was confirmed that the mass scale, single phase, equiatomic, and high purity spherical high entropy alloy powder was produced by gas atomization process. The powder was sintered by spark plasma sintering process with various sintering conditions, and mechanical properties were characterized. Through this research, we have developed a mass production process of high quality and spherical high entropy alloy powder, and it is expected to expand applications of this high entropy alloy into fields such as powder injection molding and 3D printing for complex shaped components.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GeV gamma-ray flux upper limits from clusters of galaxies
Autorzy:
Ozaki, M.
Nolan, P. L.
Bouvier, A.
Romani, R. W.
Rodriguez, A. Y.
Murgia, S.
Dermer, C. D.
Porter, T. A.
Horan, D.
Lee, S.-H.
Vasileiou, V.
Hadasch, D.
Johnson, T. J.
Brigida, M.
Bloom, E. D.
Starck, J.-L.
Reposeur, T.
Gehrels, N.
Morselli, A.
Moiseev, A. A.
Thayer, J. B.
Vitale, V.
Naumann-Godo, M.
Chekhtman, A.
Chiang, J.
Knödlseder, J.
Rainò, S.
Cecchi, C.
Frailis, M.
Bonamente, E.
Usher, T. L.
Roth, M.
Takahashi, T.
Waite, A. P.
Ciprini, S.
Michelson, P. F.
Norris, J. P.
Guiriec, S.
Tibaldo, L.
Ripken, J.
Hays, E.
Favuzzi, C.
Reimer, O.
Ritz, S.
Johnson, W. N.
Smith, P. D.
Scargle, J. D.
Moskalenko, I. V.
Tosti, G.
Conrad, J.
Jóhannesson, G.
Colafrancesco, S.
Caraveo, P. A.
Sander, A.
Kamae, T.
Fukazawa, Y.
Godfrey, G.
Profumo, S.
Baldini, L.
Rando, R.
Hayashida, M.
Katagiri, H.
Mazziotta, M. N.
Brandt, T. J.
Giordano, F.
Johnson, A. S.
Lott, B.
Stawarz, Łukasz
Cominsky, L. R.
Drell, P. S.
Mizuno, T.
Gasparrini, D.
Reimer, A.
Spinelli, P.
Edmonds, Y.
Vilchez, N.
Fusco, P.
Ajello, M.
Nuss, E.
Parkinson, P. M. Saz
Giroletti, M.
Kuss, M.
Uchiyama, Y.
Sgrò, C.
Giglietto, N.
Tibolla, O.
Bellazzini, R.
Pepe, M.
Farnier, C.
Piron, F.
Torres, D. F.
Spandre, G.
Strickman, M. S.
Monte, C.
Funk, S.
Grondin, M.-H.
Jeltema, T. E.
Cavazzuti, E.
Ohsugi, T.
Mitthumsiri, W.
Strong, A. W.
Madejski, G. M.
Pesce-Rollins, M.
de Palma, F.
Blasi, P.
Charles, E.
Glanzman, T.
Grenier, I. A.
Thayer, J. G.
Ziegler, M.
Cohen-Tanugi, J.
do Couto e Silva, E.
Omodei, N.
Lubrano, P.
Cheung, C. C.
Pfrommer, C.
Tanaka, T.
Panetta, J. H.
Allafort, A.
Borgland, A. W.
Lemoine-Goumard, M.
Dumora, D.
Dubois, R.
Barbiellini, G.
Monzani, M. E.
Sadrozinski, H. F.-W.
Gargano, F.
Razzano, M.
Winer, B. L.
Vandenbroucke, J.
Carrigan, S.
Caliandro, G. A.
Kataoka, J.
Wood, K. S.
Claus, R.
Ballet, J.
Loparco, F.
Orlando, E.
Blandford, R. D.
Bregeon, J.
Ackermann, M.
Kerr, M.
Germani, S.
Buson, S.
Takahashi, H.
Lovellette, M. N.
Çelik, Ö.
Wang, P.
Hughes, R. E.
Yang, Z.
Bechtol, K.
Cameron, R. A.
Casandjian, J. M.
Lande, J.
Suson, D. J.
Petrosian, V.
Siskind, E. J.
Bastieri, D.
Tajima, H.
Latronico, L.
Longo, F.
Makeev, A.
Bruel, P.
Paneque, D.
Tramacere, A.
Ylinen, T.
Ormes, J. F.
Harding, A. K.
Buehler, R.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Fermi Large Area Telescope observations of misaligned active galactic nuclei
Autorzy:
Norris, J. P.
Abdo, A. A.
Loparco, F.
Orlando, E.
Hays, E.
Wood, K. S.
McEnery, J. E.
Grandi, P.
Baldini, L.
Omodei, N.
Berenji, B.
Panetta, J. H.
Pesce-Rollins, M.
Fortin, P.
Makeev, A.
Thayer, J. B.
Ohsugi, T.
Brigida, M.
Ormes, J. F.
Bruel, P.
Bonamente, E.
Blandford, R. D.
Reimer, A.
Madejski, G. M.
Hadasch, D.
Winer, B. L.
Monte, C.
Bloom, E. D.
Takahashi, H.
Burnett, T. H.
Guillemot, L.
Cecchi, C.
Kamae, T.
Lubrano, P.
Bouvier, A.
Giommi, P.
Dubois, R.
Jackson, M. S.
Tosti, G.
Lott, B.
Sander, A.
Parent, D.
Okumura, A.
Çelik, Ö.
Persic, M.
Lemoine-Goumard, M.
Hayashida, M.
Siskind, E. J.
Thayer, J. G.
Mizuno, T.
Porter, T. A.
Waite, A. P.
Suson, D. J.
Glanzman, T.
Fusco, P.
Ajello, M.
Johnson, W. N.
Kataoka, J.
Borgland, A. W.
Spinelli, P.
Buehler, R.
Johnson, A. S.
Rando, R.
Bellazzini, R.
Torresi, E.
Longo, F.
Barbiellini, G.
Ballet, J.
Razzaque, S.
Bastieri, D.
Lovellette, M. N.
Scargle, J. D.
Garde, M. Llena
Guiriec, S.
Bregeon, J.
Monzani, M. E.
McConville, W.
Celotti, A.
Gasparrini, D.
Grenier, I. A.
Mazziotta, M. N.
Giordano, F.
Moskalenko, I. V.
Fukazawa, Y.
Vandenbroucke, J.
Wang, P.
Michelson, P. F.
Frailis, M.
Piron, F.
Pepe, M.
de Angelis, A.
Ferrara, E. C.
Rainò, S.
Lande, J.
Vilchez, N.
Buson, S.
Kuss, M.
Migliori, G.
Ciprini, S.
Sadrozinski, H. F.-W.
Morselli, A.
Cohen-Tanugi, J.
Gehrels, N.
Caraveo, P. A.
Pelassa, V.
Uchiyama, Y.
Davis, D. S.
Katagiri, H.
Sgrò, C.
Cavazzuti, E.
Stawarz, Łukasz
Bechtol, K.
Spandre, G.
Murgia, S.
Gargano, F.
Reyes, L. C.
Brandt, T. J.
Chiang, J.
Villata, M.
Naumann-Godo, M.
Jóhannesson, G.
Vasileiou, V.
Tanaka, T.
Yang, Z.
Casandjian, J. M.
Germani, S.
Hughes, R. E.
Charles, E.
Cannon, A.
Paneque, D.
Cheung, C. C.
Tramacere, A.
Conrad, J.
Ackermann, M.
Sanchez, D.
Reimer, O.
Claus, R.
Nolan, P. L.
Knödlseder, J.
Ylinen, T.
Malaguti, G.
Carrigan, S.
de Palma, F.
Giroletti, M.
Usher, T. L.
Cameron, R. A.
Colafrancesco, S.
Nestoras, I.
Thompson, D. J.
Chen, A. W.
Godfrey, G.
Vitale, V.
Razzano, M.
Chekhtman, A.
Fegan, S. J.
Stecker, F. W.
Roth, M.
Brez, A.
Dermer, C. D.
Mitthumsiri, W.
Favuzzi, C.
Grove, J. E.
Horan, D.
do Couto e Silva, E.
Lee, S.-H.
Torres, D. F.
Strickman, M. S.
Drell, P. S.
Giglietto, N.
Latronico, L.
Ziegler, M.
Nuss, E.
Smith, P. D.
Caliandro, G. A.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 269

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