Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "metal hardness" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-10 z 10
    Tytuł:
    Simulation of the process of metal hardness measurement by the rockwell method
    Autorzy:
    Berczyński, S.
    Grochała, D.
    Grządziel, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/27315843.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    metal hardness
    Rockwell method
    finite elements method
    Nastran FX 2010
    elastic strains
    twardość metali
    metoda Rockwella
    metoda elementów skończonych
    odkształcenia sprężyste
    Opis:
    The article presents a simulation of metal hardness determination by the Rockwell method. The authors describe a physical model of an indenter and the examined sample built by means of the Nastran FX 2010 program using the finite elements method. The modelling included subsequent stages of indenter loads that follow the procedure used in the method. The verifying calculations were made for the results of C45 steel hardness of approx. 20 HRC. Two methods of hardness measurements were analyzed. A diamond cone was used as an indenting tool in one method, a steel ball in the other. As a result of calculations, spatial maps of elastic and plastic strains and stresses were obtained throughout the process. The hardness results obtained from computer simulations and those from experiments involving C45 steel are similar. metal hardness, Rockwell method, finite elements method, Nastran FX 2010, elastic strains twardość metalu, metoda Rockwella, metoda elementów skończonych, Nastran FX 2010, odkształcenia sprężyste
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 647-654
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and Characterization of Bioceramics Reinforced Aluminium Matrix Composites
    Autorzy:
    Bhuvaneswari, V.
    Rajeshkumar, L.
    Saravanakumar, R.
    Balaji, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174579.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metal matrix composites
    bioceramics
    hardness
    compressive strength
    wear rate
    Opis:
    Current work attempts to fabricate aluminium alloy AA2219 metal matrix composite (AMC) reinforced with natural bio-based sea shell powder (SSP) which is a ceramic material, in view of improving the mechanical and tribological properties. SSP was characterized by X-Ray Diffraction (XRD) to assess its chemical constituents and particle size. Stir casting route was adopted for fabricating AMCs reinforced with 1, 2 and 3 wt.% of SSP. Energy Dispersive X-ray Spectroscopy (EDS) was used to analyse the formation of secondary elements during casting and scanning electron microscopy (SEM) was used analyze the surface morphology of the composite specimen before and after tribological tests. Hardness, Compressive strength and tribological properties were evaluated using appropriate tests and corresponding ASTM standards. Characterization methods revealed that the formation of secondary elements was very low at 3 wt.% of SSP when compared with other compositions. Hardness and compressive strength was found to be maximum for 3 wt.% of SSP while the specific wear rate and coefficient of friction values were found to be lesser for the same composite when compared with the unreinforced alloy and were on par with the AA2219 composites containing synthetic reinforcements.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1217--1226
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the effect of forging temperature on the microstructure of grade 5 titanium ELI
    Autorzy:
    Dziubińska, A.
    Majerski, K.
    Winiarski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/102101.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    grade 5 titanium ELI
    biomaterials
    metal forming
    forging
    microstructure
    hardness
    Opis:
    The paper reports the experimental results of an investigation of the effect of forging temperature on the microstructure and hardness of Grade 5 titanium ELI. A growing interest in the use of titanium alloys in implantology results from their unique properties. Grade 5 titanium ELI is widely used in medicine for producing a variety of implants and medical tools such as hip, knee and shoulder joints; bone plates; pacemaker casing and its components; screws; nails; dental materials and tools. In the first part of the paper the properties of Grade 5 titanium ELI are described and examples of medical applications of this alloy are given. In a subsequent section of the paper, forging tests performed on this biomaterial in a temperature range from 750°C to 1100°C are described. Following the forging process, the results of the titanium alloy’s microstructure and hardness are reported. The experimental results are used to determine the most suitable forging temperature range for Grade 5 titanium ELI with respect to its microstructure.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 4; 147-158
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Friction and Wear Behavior of Direct Metal Deposition on SUH3
    Autorzy:
    Choi, Byungjoo
    Cho, In-Sik
    Jung, Do-Hyun
    Lee, Moon G.
    Jeon, Yongho
    Powiązania:
    https://bibliotekanauki.pl/articles/352111.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    direct metal deposition
    heat pretreatment
    friction test
    wear test
    micro-hardness
    Opis:
    Poppet valves made from high-frequency heat-treated SUH3 steel have insufficient durability, and scratches appear on the valve face in prolonged use. It is necessary to develop surface treatment technology with excellent durability to prevent the deterioration of engine performance. Therefore, a surface treatment technology with higher abrasion resistance than existing processes was developed by direct metal deposition to the face where the cylinder and valve are closed. In this study, heat pretreatment and deposition tests were performed on three materials to find suitable powders. In the performance evaluation, the hardness, friction coefficient, and wear rate were measured. Direct metal deposition using Inconel 738 and Stellite 6 powders without heat pretreatment were experimentally verified to have excellent durability.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 841-844
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Structure on Physicomechanical Properties of Transition Metals Diboride Films
    Autorzy:
    Goncharov, A.
    Yunda, A.
    Komsta, H.
    Rogalski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033745.pdf
    Data publikacji:
    2017-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    transition metal diborides
    nanocomposite coating
    magnetron sputtering
    structural state
    hardness
    elastic modulus
    Opis:
    Research of the effect of structure on composition and physicomechanical properties of transition metals diboride films deposited by RF-magnetron sputtering was carried out. It was shown that there is a wide range of different structures, from amorphous to nanocrystalline one with 1-40 nm nanocrystallite sizes in the case of transition metals diboride films. The correlation between the structure, composition, and physicomechanical properties of transition metals diboride films was established.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 2; 270-273
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Transition Metal Carbides on Microstructure and Mechanical Properties of Ultrafine Tungsten Carbide Via Spark Plasma Sintering
    Autorzy:
    Lee, Jeong-Han
    Oh, Ik-Hyun
    Park, Hyun-Kuk
    Powiązania:
    https://bibliotekanauki.pl/articles/2048887.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    WC cemented carbide
    transition metal carbide
    spark plasma sintering
    grain growth inhibitor
    hardness
    Opis:
    WC-Co cemented carbides were consolidated using spark plasma sintering in the temperature 1400°C with transition metal carbides addition. The densification depended on exponentially as a function of sintering exponent. Moreover, the secondary (M, W)Cx phases were formed at the grain boundaries of WC basal facet. Corresponded, to increase the basal facets lead to the plastic deformation and oriented grain growth. A higher hardness was correlated with their grain size and lattice strain. We suggest that this is due to the formation energy of (M, W)Cx attributed to inhibit the grain growth and separates the WC/Co interface.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 4; 1029-1032
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kucie wyrobów złożonych o małych wymiarach
    Forging complex products of small sizes
    Autorzy:
    Ziółkiewicz, S.
    Stachowiak, Z.
    Kaczmarczyk, D.
    Karpiuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/211329.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
    Tematy:
    obróbka plastyczna
    kucie na zimno
    odkuwka
    mikrostruktura
    twardość
    metal forming
    cold forging
    forging
    microstructure
    hardness
    Opis:
    W artykule przedstawiono wyniki badań kształtowania złożonych wyrobów o niewielkich wymiarach na przykładzie opracowanej technologii kucia na zimno odkuwki łącznika. Przedstawiono wpływ rodzaju materiału oraz kształtu materiału wyjściowego na stopień wypełnienia matrycy. Stwierdzono, że w przypadku kształtowanego łącznika materiał mniej plastyczny (stal 16HG) lepiej wypełnia wykrój matrycy niż materiał o większej plastyczności (stopy aluminium PA2, PA4). Podano wyniki pomiarów twardości oraz mikrostruktury. Stwierdzono, że w przypadku stopów aluminium występuje bardziej równomierny rozkład twardości oraz odkształcenia struktury niż w przypadku odkuwek stalowych.
    The paper presents the results of investigation of forming small size products with complex shapes. As an example, the developed technology of cold forming of a connector forging has been studied. The influence of the kind of material and the blank shape on the die filling has been shown. It has been found that, in the case if the connector being formed, the less plastic material (16HG steel) fills the die impression better than material of higher plasticity (PA2, PA4 aluminium alloys). Hardness measurement results and microstructure examination results have been stated. It has been found that the distribution of hardness and structure deformation in aluminium alloys is more uniform than that in steel forgings.
    Źródło:
    Obróbka Plastyczna Metali; 2006, 17, 1; 7-13
    0867-2628
    Pojawia się w:
    Obróbka Plastyczna Metali
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of prosthetic elements manufacturing technology on properties and microstructure shaping Co-Cr-Mo alloys
    Autorzy:
    Augustyn-Nadzieja, Joanna
    Szczotok, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/1844979.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    Co-Cr-Mo alloys
    dental prosthetics
    lost wax casting method
    selective laser sintering of metal powders (DLMS)
    microstructure
    hardness
    Opis:
    The presented publication discusses the test results regarding samples of a prosthetic alloy from the Co-Cr-Mo system. The test samples were obtained by means of two different methods applied in prosthetics laboratories to compare their properties and microstructure. To obtain the samples via the traditional lost wax casting method, the cast alloy Co-Cr-Mo was used, commercially known as Wironit LA. In the case of the modern technique DMLS (Direct Metal Laser Sintering), metallic powder Co-Cr-Mo, called EOS Cobalt Chrome MP1, was used. The samples of both Co-Cr-Mo alloys obtained via the two methods were prepared for metallographic tests; they also underwent microstructural observations with the use of light microscopy (LM) and scanning electron microscopy (SEM), and next they were subjected to hardness tests. The obtained samples demonstrated a dendritic structure. In the samples cast with the lost wax casting method, a segregation of the chemical composition was revealed. The samples obtained by means of the DLMS method were characterized by chemical composition homogeneity. The hardness measurements with the statistical analysis of the measurement results showed a difference between the examined alloys. On the basis of the performed studies, it was stated that the applied methods of manufacturing prosthetic elements make it possible to obtain diversified microstructural and mechanical properties of the alloys. The hardness value significantly affects the subsequent mechanical and finishing treatment of prosthetic elements, such as metal bases of crown caps, bridges, mobile prostheses or other retention elements.
    Źródło:
    Engineering of Biomaterials; 2020, 23, 156; 24-31
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Natryskiwane zimnym gazem powłoki odporne na ścieranie
    Wear resistant coatings deposited by cold gas spraying
    Autorzy:
    Kusiński, J.
    Kąc, S.
    Kowalski, K.
    Matteazzi, P.
    Dosta, S.
    Georgiou, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/195791.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    mechaniczna synteza
    powłoki metal/ceramika
    mikrostruktura
    twardość
    testy tribologiczne
    high energy ball milling
    cermet coatings
    microstructure
    hardness
    tribological tests
    Opis:
    Naukowym i technologicznym celem badań było wytworzenie nanostrukturalnych powłok FeCuAl-Al2O3, WC-CoAl, Ni-Sn, TiC/Ti o grubości od 45 do 500 μm. Nanoproszki charakteryzujące się strukturą krystaliczną i równomiernym rozmieszczeniem składników otrzymywano, stosując wysokoenergetyczną syntezę mechaniczną. Proszek o strukturze nanokrystalicznej był nanoszony na podłoże bez istotnych zmian jego struktury i właściwości, z wykorzystaniem nowej technologii (natryskiwania zimnym gazem – CGS), pozwalającej uzyskiwać powłoki o dużej gęstości. Mikrostrukturę oraz skład chemiczny nanoproszków i nanoszonych powłok analizowano, wykorzystując mikroskopię świetlną, TEM, STEM, SEM/EDS, XPS oraz XRD. Ponadto mierzono współczynnik tarcia oraz odporność na ścieranie powłok. Przeprowadzone badania wykazały, że mikrostruktura powłok odpowiada strukturze nanoszonych proszków. Dzięki nanostrukturalnej budowie powłok, właściwej proporcji faz twardych i miękkich, natryskiwane zimnym gazem powłoki wykazują lepsze właściwości trybologiczne w porównaniu z materiałami standardowo stosowanymi w przemyśle i bioinżynierii.
    The basic scientific and technological aim of the research was the generation of nano-structured FeCuAl-Al2O3, WC-CoAl, Ni-Sn, TiC/Ti coatings having thicknesses of about 100-500 μm. High energy ball milling synthesis allowed the production of powders characterized by fine and homogeneous chemical distribution of elements, and an "ultrafine" (nanometer scale) crystalline structure. A new powerful deposition technology (Cold Gas Spray – CGS) was used to transfer the nanophased powder onto the substrate in the form of a dense coating with very little or no change of crystal structure and properties. The microstructure and composition of all prepared nano-powders and deposited coatings were investigated using light microscopy, TEM, STEM, SEM/EDS, XPS and XRD techniques. Hardness, and measurement of the coefficient of friction and wear resistance were carried out on the deposited coatings. It was found that the microstructure of the powder is maintained in the deposited coating. The nano phased structure, with an appropriate balance of hard and soft phases, allows the CGS coatings to exhibit better tribological properties than that of the examined benchmark materials.
    Źródło:
    Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika; 2018, z. 90 [298], 2; 175-186
    0209-2689
    2300-5211
    Pojawia się w:
    Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research of the defective frog wing OF 1/11 mark
    Autorzy:
    Gavrilovs, P.
    Ivanovs, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/375481.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    defective rail
    point switch
    wing
    top
    base
    frog
    mark
    hardness
    elements
    metal
    metal structure
    wadliwa szyna
    punkt przełączenia
    łopatka
    wierzchołek
    podstawa
    zwrotnica napowietrzna
    znacznik
    twardość
    elementy
    struktura metalu
    Opis:
    In this article, for the first time, research of the defective frog wing of the 1/11 mark on the Latvian Railway has been carried out. In the process of which was collected, processed and the analysis of points defects on the Latvian Railway was carried out for eight compartments of the track distance during 2014, 2015 and 2016 (Developed a chief of defectoscopy shop V. Glotov, approved CD the chief of the distance V. Makedon). The frog wing of the 1/11 mark (the 60 E1 DO 04 07 frog type) was considered according to the basic classification of the defects, and an analysis and research of the cause of its fracture were carried out.
    Źródło:
    Transport Problems; 2017, 12, 4; 119-126
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies