Temat: structural tests - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Maintenance of airfield pavements made of cement concrete with respect to their durability
Autorzy:: Linek, M.
Nita, P.
Powiązania:: https://bibliotekanauki.pl/articles/245300.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: airfield pavement
pavement durability
pavement maintenance
airfield operations safety
structural tests
Opis:: The issue of concrete airfield pavements maintenance is the process, the efficient performance of which may provide suitable life and air traffic safety related to thereof. Obtaining durable airfield pavement is a result of team cooperation in the following fields: suitable design solutions, applicable work technology and principles of arrangement thereof. However, fundamental link of this process is the high level of engineering culture related to construction maintenance during its whole "lifespan". Each pavement must comply with requirements according to principles of "construction limit states" method expressing work safety, i.e. limit state of deformation and serviceability. Thereby, the "weakest link" within the chain of projects and actions implemented in the course of its construction process decides about safety and lifespan of pavement operation. Durability of such engineering constructions as airfield pavements, is specified by the quantity of performed "flight operations" on these pavements, within the assumed operation period. Considering, among others, principles of limit state method, the required and anticipated pavement operation period can be specified. Life aspect with reference to airfield pavements can be analysed in theory by means of application of modern material solutions. The above-mentioned aspects will be described widely in this work. Modern material solutions include modified composition of concrete intended for construction of particularly difficult sections of such pavements and structural tests were conducted for such composition, which would confirm suitability of assumed material solutions.
Źródło:: Journal of KONES; 2016, 23, 1; 215-221
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of annealing conditions on changes of the structure and selected properties of Al88Y7Fe5 and Al88Y6Fe6 alloys
Autorzy:: Babilas, Rafał
Spilka, Monika
Łoński, Wojciech
Radoń, Adrian
Kądziołka-Gaweł, Mariola
Gębara, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/2204524.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Al-Y-Fe metallic glasses
heat treatment
structural tests
corrosion resistance
magnetic properties
szkło metaliczne Al-Y-Fe
obróbka cieplna
test strukturalny
odporność na korozję
właściwości magnetyczne
Opis:: Al-Y-Fe amorphous and nanocrystalline alloys are characterized by a unique collection of diverse properties that are influenced by various factors, including heat treatment. In this paper, the effect of heat treatment on the structural changes and selected properties of Al-Y-Fe metallic glasses in the as-spun state is investigated. The structure of the Al88Y7Fe5 and Al88Y6Fe6 alloys was examined by X-ray diffraction (XRD) and Mössbauer spectroscopy (MS). The corrosion resistance of the samples was characterized using polarization tests in a 3.5% NaCl solution at 25 °C. The effect of sodium chloride on the surface was studied with scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The magnetic properties of Al-based alloys were explored using a vibrating sample magnetometer (VSM). It was revealed that the tested alloys show better properties after annealing than in the as-spun state. The annealing of the Al88Y7Fe5 and Al88Y6Fe6 alloys in the temperature range of 200 to 300 °C improved the magnetic properties and corrosion resistance of these materials. After 3,600 s, the better EOCP values were recorded for the Al88Y6Fe6 and Al88Y7Fe5 alloys after annealing at 300 °C and 200 °C, adequately. On the basis of the polarization tests, it was concluded that the electrochemical properties are better for Al88Y6Fe6 alloys after annealing at 300 °C.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144614
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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