Temat: method-based - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Modelling the composition of carbides in nickel-based superalloys of directional crystallization
Autorzy:: Glotka, O. A.
Powiązania:: https://bibliotekanauki.pl/articles/1818827.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: nickel-based superalloys
directional solidification
alloying system
CALPHAD method
structure
composition of carbides
nadstopy niklu
krzepnięcie kierunkowe
metoda CALPHAD
struktura
węgliki
Opis:: Purpose: The specifics of the influence of alloying elements on the chemical composition of various types of carbides, their topology and morphology for a multicomponent system of the type Ni-5Cr-9Co-6Al-1Ti-11.7W-1.1Mo-1.6Nb-0.15C using the calculation method CALPHAD. It is shown that the obtained dependences closely correlate with thermodynamic processes occurring in the system. Design/methodology/approach: This work presents the results of studies of the distribution of chemical elements in the composition of carbides, depending on their content in the system. Findings: It was found that the influence of alloying elements on the composition of carbides is complex and is described by complex. Research limitations/implications: An essential problem is the prediction of the structure and properties of heat-resistant alloys without or with a minimum number of experiments. Practical implications: The obtained dependences can be used both for designing new heat-resistant alloys and for improving the compositions of industrial alloys. Originality/value: The value of this work is that the obtained dependences of the influence of alloying elements on the dissolution (precipitation) temperatures and the distribution of elements in carbides in the alloy of the Ni-5Cr-9Co-6Al-1Ti-11.7W-1.1Mo-1.6Nb-0.15C.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2020, 102, 1; 5--15
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Mathematical forecasting composition of secondary carbides in the single-crystal superalloys
Autorzy:: Glotka, O.A.
Olshanetskii, V.I.
Powiązania:: https://bibliotekanauki.pl/articles/2175759.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: single-crystal nickel-based superalloy
alloying system
CALPHAD method
structure
composition of secondary carbides
krystaliczny nadstop na bazie niklu
układ stopowy
metoda CALPHAD
struktura
skład węglików wtórnych
Opis:: Purpose: Predicting the specifics of the distribution of alloying elements between secondary carbides, their topology, and morphology, as well as the composition for a single-crystal multicomponent system of the type Ni-11.5Cr-5Co-3.6Al-4.5Ti-7W-0.8Mo-0.06C using the calculated CALPHAD (passive experiment) versus scanning electron microscopy (active experiment). Design/methodology/approach: This work presents the results of studies of the distribution of chemical elements in the composition of carbides, depending on their content in the system. The studies were carried out using an electron microscope with computer analysis of images and chemical composition. Findings: It was found that the influence of alloying elements on the composition of carbides is complex and is described by complex dependencies that correlate well with the obtained experimental results. Research limitations/implications: An essential problem is the prediction of the structure and properties of superalloys without or with a minimum number of experiments. Practical implications: The obtained dependencies can be used both for designing new superalloys and for improving the compositions of industrial alloys. Originality/value: The value of this work is that the obtained dependences of the influence of alloying elements on the dissolution (precipitation) temperatures and the distribution of elements in secondary carbides in the superalloy of the Ni-11.5Cr-5Co-3.6Al-4.5Ti-7W- 0.8Mo-0.06C system. It was found that changes in the course of the curves of temperature dependence on the element content closely correlate with thermodynamic processes occurring in the system, that is, the curves exhibit extrema accompanying the change in the stoichiometry of carbides or the precipitation of new phases.
Źródło:: Archives of Materials Science and Engineering; 2021, 111, 1; 34--41
1897-2764
Pojawia się w:: Archives of Materials Science and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of the thermal properties and structure of gypsum modified with cellulose based polymer and aerogels
Analiza właściwości cieplnych i struktury gipsu modyfikowanego mikrododatkami
Autorzy:: Prałat, K.
Jaskulski, R.
Ciemnicka, J.
Makomaski, G.
Powiązania:: https://bibliotekanauki.pl/articles/1849755.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: przewodność cieplna
mikrododatek
struktura
metoda gorącego drutu
gips modyfikowany
polimer na bazie celulozy
aerożel
thermal conductivity
micro additive
structure
hot wire method
modified gypsum
cellulose based polymer
aerogel
Opis:: The work presents results of research on the influence of micro materials on the thermal conductivity λ of gypsum. In the research, cellulose-based polymer and aerogel were used as the modifying micro materials. For the purpose of measuring the thermal conductivity, a non-stationary method was used based on the “hot wire method”. A very precise set of devices for measuring and recording the temperature of the heating wire was used. In the presented solution, a single measurement took only one minute. Measurements were recorded with the help of a computer measuring system, with a sampling time of 0.01s. During the 60-second-long test, 6000 measurements of the heating wire temperature were collected. A decrease of the thermal conductivity and density of hardened gypsum with added micro materials was observed due to modifications of the structure of the final product. Experimental values of the thermal conductivity of the gypsum specimens with the addition of polymer and aerogel were respectively over 23% and 6% lower than the non-modified gypsum specimen.
W pracy przedstawiono wyniki pomiarów przewodności cieplnej λ czystego gipsu, a także jego modyfikacji mikrododatkami takimi jak: polimer (hydroksymetylo etylo celuloza - HEMC) i aerożel. Dodatkowo zbadano zmiany struktury modyfikowanych materiałów. Badania przewodności cieplnej oparte są na zaprojektowanym i nowatorskim stanowisku pomiarowym wykorzystującym metodę "gorącego drutu". Czas trwania pomiaru przewodności cieplnej za pomocą komercyjnych urządzeń doświadczalnych mieści się w zakresie 0,5÷4 h, tymczasem w prezentowanych badaniach pojedynczy pomiar trwał minutę. Wyniki uzyskiwane podczas pomiaru rejestrowano za pomocą komputerowego systemu pomiarowego, z czasem próbkowania wynoszącym 0,01s. Podczas 60-sekundowego testu zebrano 6000 pomiarów temperatury drutu grzejnego.
Źródło:: Archives of Civil Engineering; 2020, 66, 4; 153-168
1230-2945
Pojawia się w:: Archives of Civil Engineering
Dostawca treści:: Biblioteka Nauki

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