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    Wyświetlanie 1-7 z 7
    Tytuł:
    Electrolytic Plasma Surface Cleaning of Industrial Metallic Components
    Autorzy:
    Kumruoglu, L.
    Özel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1194881.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.65.Kn
    82.45.Qr
    82.45.Hk
    Opis:
    Electrolytic plasma is an emerging, environmentally friendly surface engineering technology that can be used for cleaning of metal surfaces and removing several coating. The present work was concerned with cleaning of corrosion products (oxides and contamination) on steel surfaces for corrosion protection. The effects of processing parameters on cleaning steel surfaces were investigated. The results show that electrolytic plasma can effectively produce clean surfaces and remove iron oxides. Also the arc spray coatings deposited on steel was removed by electrolytic plasma.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 379-381
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wear Performance of Hardened 1.2333 Cold Work Tool Steel by Plasma Electrolysis
    Autorzy:
    Özel, A.
    Kumruoglu, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1218174.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.40.Cd
    81.40.Ef
    52.50.-b
    52.77.-j
    Opis:
    Plasma electrolysis is an electrolytic-chemical-thermal technique that can be used for local hardening of the different type of steels. The feasibility of hardening the 1.2333 cold work tool steel by applying a single-stage-local surface treatment, which combines the methods of plasma electrolysis, is discussed. The effects of treatment durations of plasma electrolytic hardening on the surface microstructural, mechanical, and tribological characteristics of 1.2333 cold work steel substrates are studied. The major advantage of the plasma electrolytic hardening is shown to be hardened layer (maximum 900 Hv - minimum 500 Hv) of the substrates consisting of martensitic phase in very short treatment durations, approximately 7 mm thick/0.5 min. Reciprocating-sliding friction and wear tests against an alumina ball counter face have shown that the application of a plasma electrolysis promotes a change in wear mechanism of the friction pair from relatively severe adhesion-abrasion to mild deformation. This results in simultaneous reduction of the volumetric wear rate from 0.18-0.2 $mm^3$ to 0.04 $mm^3$.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 304-306
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Revealing Prior-Austenite Grain Boundaries and Martensitic Structure of As-Quenched AISI 4140 Steel Treated by Plasma Electrolysis
    Autorzy:
    Cenk Kumruoglu, L.
    Özel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399956.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.40.Gh
    81.40.-z
    81.65.Cf
    52.50.-b
    Opis:
    The determination of prior-austenite grain size has been the subject of metallurgical research efforts for many years. Metallurgical laboratories are often required to perform prior-austenite grain size determinations on martensitic steel components that have been heat treated. Although these methods may occasionally be mandated by material or procedural specifications, they are typically not preferred because they have a tendency of altering the as-received microstructure. These processes can also be labour-intensive and costly. The goal of this work is to chemically etch and identify the prior austenite grain size and martensitic structure of AISI 4140 steel treated by plasma electrolysis. Polished samples were immersed in 60% HCl, 30% $HNO_3$, 5% HF, 5% $H_2O$ for 5 seconds then immersed in 5% picric acid, 5% HCl, 90% ethanol to reveal microstructures. Finally, the grain boundary and lath martensitic structure were revealed.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 404-406
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Feederless Casting Limits by Thermal Analysis in Cast Iron
    Autorzy:
    Erturk, S.
    Kumruoglu, L.
    Ozel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030308.pdf
    Data publikacji:
    2017-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Bx
    81.30.-t
    81.30.Fb
    81.70.Pg
    Opis:
    In this study the determinations of melt quality was carried out by thermal analysis of ductile iron. The aim of the study was to determine the limits of feederless casting after the determination of inoculation quality in cast iron. Production method of pouring into a sand mold in the entirety and without using feeder systems has been investigated. Forms of the solidification and volume change have been investigated with simulation program as functions of inoculation quality, type of resin in the mold and mold rigidity. Results of the analysis have been compared with the results of experimental iron casting.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 3; 370-373
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Simulation and Fabrication Works on Optimization of High Pressure Aluminum Die Casting Part
    Autorzy:
    Ertürk, S.
    Kumruoğlu, L.
    Özel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1181961.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.20.Hy
    81.05.Bx
    Opis:
    High-pressure die casting offers reduced costs due to its small tolerances and smooth surface finish. Casting parts produced are consumed by the automotive industry in millions. In this study, the use of computer aided engineering applications on design of high-pressure die-casting was studied. The influence of casting process steps in die design was studied and analyzed. The casting simulation software was used to improve design and solve problems. By using the simulation software in analyses of die design, the final design was reached in a few hours and thus the design process of pre-production was shortened and mold production was carried out with no revision on die material. Radiographic test was applied on the casting parts and the result shows good correlation between simulations of solidification result data. Also the results proved that the application of squeeze pressure in the intensification phase of high-pressure die casting process could be examined in the casting simulation.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 449-451
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficient in vitro plant regeneration from cultured leaf and petiole explants of Isatis constricta Davis
    Autorzy:
    Özel, Ç.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11867960.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    Turkey
    Brassicaceae
    Isatis constricta
    plant regeneration
    shoot regeneration
    leaf
    petiole
    in vitro method
    plant propagation
    micropropagation
    Opis:
    Isatis concstricta Davis (an endemic plant of Turkey) suffers from low propagation rates under natural conditions and is threatened due to fast unplanned urbanisation. The study compared the effects of variants of BA + NAA on shoot regeneration on leaf and petiole explants excised from one week old in vitro regenerated seedlings. MS medium containing 1 mg L–1 BA + 1 mg L–1 NAA induced maximum proliferation on petiole and leaf explants with 13.33 and 12.75 shoots per explant repectively. However, leaf explant induced shoots were sturdy and healthier compared to petiole explant induced shoots. These shoots were rooted on MS medium containing 0.5 mg L–1 IBA and the plants were acclimatized in peat moss and sand (v/v). They grew to flowering under ex vitro conditions. This system of regeneration is advantageous for conventional propagation and the results will help in establishment of a powerful and meaningful micropropagation system for I. constricta.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 3; 49-55
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabricating of Steel/Cast Iron Composite by Casting Route
    Autorzy:
    Ertürk, S.
    Çakır, O.
    Kumruoglu, L.
    Ozel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182854.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    47.11.-j
    81.20.Hy
    81.30.Fb
    81.05.Ni
    68.08.-p
    Opis:
    In this study, 1.2333 cold work tool steel and cast iron (GG 25) were simultaneously melted in different furnaces to fabricate composite die mold used in sheet metal forming industry. To enhance the metallurgical bond between two components of composite part, the pouring temperature of cast iron was assessed just above the solidus temperature, then metallurgically prepared cast iron was poured on to the cast tool steel. The temperature and casting parameters were monitored and simulated. Experimental and simulation results were compared, finally the optimum parameters and casting route were revealed.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 452-453
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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