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Wyszukujesz frazę "anisotropy properties" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Ceramic Mould Internal Structure Anomalies in the Lost Wax Process
Autorzy:
Biernacki, R.
Grześ, J.
Haratym, R.
Tomasik, J.
Powiązania:
https://bibliotekanauki.pl/articles/380913.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ceramic mould
anisotropy properties
fractal dimension
heat transfer coefficient
formy ceramiczne
właściwości anizotropowe
wymiar fraktalny
współczynnik przewodnictwa cieplnego
Opis:
The paper analyzes the structure of the ceramic mould, which include discussion about its structure creation. The results of research relate to the strength of the ceramic mould and its thermophysical properties. Structural anisotropy was found and its influence on the mould surface morphology depending on its position with respect to the sprue in the assembly set. The paper also presents evaluation of microgeometry of patterns, ceramic mould and casts produced in a joint production process. Last part includes the results of the fractal dimension measurements of ceramic mould cross-sections. The analysis was based on the mould porosity. For the analyzed structures the percentage of pores and linear fractal dimension was determined, using the line counting dimension method (LCD), which is a modification of box counting dimension method (BCD).
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 57-62
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-ferrous Metals Precision Casting Shape Accuracy in Terms of Ceramic Moulds Anisotropic Material Properties
Autorzy:
Biernacki, R.
Haratym, R.
Kwapisz, J.
Powiązania:
https://bibliotekanauki.pl/articles/380660.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
casting shape accuracy
lost wax casting
ceramic mould
anisotropy properties
dokładność kształtu
metoda traconego wosku
forma ceramiczna
własności anizotropowe
Opis:
Shape accuracy analysis of aluminum alloy castings was made in function of ceramic mould properties. Taken it to account was anisotropy of those properties, including influence of ceramic mould properties on the porosity of castings. Ceramic moulds strains, which occur in sintering phase, were evaluated with taking into account the design and production process.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1 spec.; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anisotropy of mechanical and structural properties in AA 6060 aluminum alloy following hydrostatic extrusion process
Autorzy:
Przybysz, S.
Kulczyk, M.
Pachla, W.
Skiba, J.
Wróblewska, M.
Mizera, J.
Moszczyńska, D.
Powiązania:
https://bibliotekanauki.pl/articles/201595.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrostatic extrusion
anisotropy
mechanical properties
grain refinement
Opis:
The study attempts to investigate the influence of severe plastic deformation (SPD in the hydrostatic extrusion (HE) process on the anisotropy of the structure and mechanical properties of the AA 6060 alloy. Material in isotropic condition was subjected to a single round of hydrostatic extrusion with three different degrees of deformation (ε= 1.23, 1.57, 2.28). They allowed the grain size to be fragmented to the nanocrystalline level. Mechanical properties of the AA 6060 alloy, examined on mini-samples, showed an increase in ultimate tensile strength (UTS) and yield strength (YS) as compared to the initial material. Significant strengthening of the material results from high grain refinement in transverse section, from »220 μm in the initial material to »300 nm following the HE process. The material was characterized by the occurrence of structure anisotropy, which may determine the potential use of the material. Static tensile tests of mini-samples showed »10% anisotropy of properties between longitudinal and transverse cross-sections. In the AA6060 alloy, impact anisotropy was found depending on the direction of its testing. Higher impact toughness was observed in the cross-section parallel to the HE direction. The results obtained allow to analyze the characteristic structure created during the HE process and result in more efficient use of the AA 6060 alloy in applications.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 4; 709-717
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anisotropy of structural and mechanical properties in CuCrZr alloy following hydrostatic extrusion process
Autorzy:
Przybysz, Sylwia
Kulczyk, Mariusz
Skiba, Jacek
Skorupska, Monika
Powiązania:
https://bibliotekanauki.pl/articles/2173697.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrostatic extrusion
anisotropy
mechanical properties
grain refinement
CuCrZr alloys
wytłaczanie hydrostatyczne
anizotropia
właściwości mechaniczne
rozdrabnianie ziarna
stop CuCrZr
Opis:
The methods of severe plastic deformation (SPD) of metals and metal alloys are very attractive due to the possibility of refinement of the grains to nanometric sizes, which facilitates obtaining high mechanical properties. This study investigated the influence of SPD in the process of hydrostatic extrusion (HE) on the anisotropy of the mechanical properties of the CuCrZr copper alloy. The method of HE leads to the formation of a characteristic microstructure in deformed materials, which can determine their potential applications. On the longitudinal sections of the extruded bars, a strong morphological texture is observed, manifested by elongated grains in the direction of extrusion. In the transverse direction, these grains are visible as equiaxed. The anisotropy of properties was mainly determined based on the analysis of the static mini-sample static tensile test and the dynamic impact test. The obtained results were correlated with microstructural observations. In the study, three different degrees of deformation were applied at the level necessary to refine the grain size to the ultrafine-grained level. Regardless of the applied degree of deformation, the effect of the formation of a strong morphological texture was demonstrated, as a result of which there is a clear difference between the mechanical properties depending on the test direction, both by the static and dynamic method. The obtained results allow for the identification of the characteristic structure formed during the HE process and the more effective use of the CuCrZr copper alloy in applications.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e141725
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
UV-Induced Anisotropy in CdBr2-CdBr2: Cu Nanostructures
Anizotropia wywołana promieniowaniem UV w nanostrukturach CdBr2-CdBr2: Cu
Autorzy:
El-Naggar, A. M.
Albassam, A. A.
Oźga, K.
Szota, M.
Kityk, I. V.
Powiązania:
https://bibliotekanauki.pl/articles/356453.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CdBr2-CdBr2: Cu nanocrystalline film
UV-induced anisotropy
optical properties
birefringence
layered crystals
warstwy nanokystaliczne CdBr2-CdBr2: Cu
anizotropia wywołana UV
właściwości optyczne
dwoistość
kryształy warstwowe
Opis:
We have found an occurrence of anisotropy in the nanostructure CdBr2-CdBr2: Cu nanocrystalline films. The film thickness was varied from 4 nm up to 80 nm. The films were prepared by successive deposition of the novel layers onto the basic nanocrystals. The detection of anisotropy was performed by occurrence of anisotropy in the polarized light at 633 nm He-Ne laser wavelength. The occurrence of anisotropy was substantially dependent on the film thickness and the photoinduced power density. Possible mechanisms of the observed phenomena are discussed.
Wykryto pojawienie się anizotropii w nanostrukturalnych warstwach nanokrystalicznych CdBr2-CdBr2: Cu. Grubość warstwy zmieniano w zakresie od 4 nm do 80 nm. Nanostrukturalne warstwy otrzymano poprzez kolejne osadzanie na nowych warstwach na podstawie nanokrystalitów. Detekcję anizotropii wykonano w spolaryzowanym świetle lasera gazowego He-Ne o długości fali 633 nm. Anizotropia optyczna występująca w warstwach w znacznym stopniu zależy od grubości warstwy i gęstości mocy indukowanej światłem. Omówiono możliwe mechanizmy obserwowanego zjawiska.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3A; 2029-2032
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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