Temat: alloy - Katalog OPAC zbiorów

Skocz do pozycji: 76.

Tytuł:: Assessment of AlSi21CuNi alloy’s quality with use of ATND method
Autorzy:: Pezda, J.
Powiązania:: https://bibliotekanauki.pl/articles/380515.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hypereutectic Al-Si alloy
modification
ATND
mechanical properties
stop nadeutektyczny Al-Si
modyfikacja
metoda ATND
właściwości mechaniczne
Opis:: Majority of combustion engines is produced (poured) from Al-Si alloys with low thermal expansion coefficient, so called piston silumins. Hypereutectic alloys normally contain coarse, primary angular Si particles together with eutectic Si phase. The structure and mechanical properties of these alloys are highly dependent upon cooling rate, composition, modification and heat-treatment operations. In the paper one depicts use of the ATND method (thermal-voltage-derivative analysis) and regression analysis to assessment of quality of the AlSi21CuNi alloy modified with Cu-P on stage of its preparation, in aspect of obtained mechanical properties (R_0,02, R_m, A₅, HB). Obtained dependencies enable prediction of mechanical properties of the investigated alloy in laboratory conditions, using values of characteristic points from curves of the ATND method.
Źródło:: Archives of Foundry Engineering; 2013, 13, 4; 87-92
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 77.

Tytuł:: Analysis of the Microstructure, Properties and Machinability of Al-Cu-Si Alloys
Autorzy:: Kozana, J.
Piękoś, M.
Maj, M.
Garbacz-Klempka, A.
Żak, P. L.
Powiązania:: https://bibliotekanauki.pl/articles/1840820.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: casting of non-ferrous metals
aluminum alloys
ternary Al-Cu-Si alloy
mechanical properties
microstructure
thermo-calc
odlewanie metali nieżelaznych
stopy aluminium
stop trójskładnikowy Al-Cu-Si
właściwości mechaniczne
mikrostruktura
Opis:: As part of the studies conducted in the field of broadly understood casting of non-ferrous metals, selected results on the impact of variable additions of copper and silicon in aluminium were presented. A series of melts was carried out with copper content kept constant at a level of 2% (1st stage) and 4% (2nd stage) and variable contents of silicon introduced into aluminium. The crystallization characteristics of the examined alloys and the percentage of structural constituents at ambient temperature were obtained by modelling the thermodynamic parameters of individual phases with the CALPHAD method. The microstructure of the obtained alloys was examined and microhardness was measured by the Vickers-Hanemann method. The alloy properties were assessed based on the results of mechanical tests, including ultimate tensile strength (UTS), hardness (BHN) and elongation (E). The machinability of the tested alloys was analyzed in a machinability test carried out by the Keep-Bauer method, which consisted in drilling with a constant feed force. The obtained results clearly indicate changes in the images of microstructure, such as the reduction in grain size, solution hardening and precipitation hardening. The changes in the microstructure are also reflected in the results of mechanical properties testing, causing an increase in strength and hardness, and plasticity variations in the range of 4 ÷ 16%, mainly due to the introduced additions of copper and silicon. The process of alloy strengthening is also visible in the results of machinability tests. The plotted curves showing the depth of the hole as a function of time and the images of chips produced during the test indicate an improvement in the wear resistance obtained for the tested group of aluminium alloys with the additions of copper and silicon.
Źródło:: Archives of Foundry Engineering; 2020, 20, 4; 145-153
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 78.

Tytuł:: Analiza właściwości mechanicznych blachy wykonanej ze stopu tytanu Ti6Al4V w warunkach quasi-statycznych i dynamicznych obciążeń rozciągających
Mechanical properties analysis of the plate made of Ti6Al4V in the quasi-static and dynamic tensile loading
Autorzy:: Kostrzewski, C.
Moćko, W.
Powiązania:: https://bibliotekanauki.pl/articles/107333.pdf
Data publikacji:: 2015
Wydawca:: Instytut Transportu Samochodowego
Tematy:: blacha
stop tytanu
proces rozciągania
właściwości mechaniczne
plate
titanium alloy
tensile process
mechanical properties
Opis:: W artykule przedstawiono metodykę badania próbek wykonanych ze stopu tytanu Ti6Al4V w warunkach quasi-statycznych oraz dynamicznych, przeprowadzonego odpowiednio z wykorzystaniem maszyny wytrzymałościowej oraz metody zmodyfikowanego pręta Hopkinsona. Przebieg procesu rozciągania zastał przeanalizowany metodą cyfrowej korelacji obrazu, w wyniku czego otrzymano rozkład wartości odkształcenia na powierzchni badanych próbek. Na podstawie danych zarejestrowanych przez maszynę wytrzymałościową oraz uzyskanych z użyciem teorii propagacji fal sprężystych w prętach wyznaczono krzywe rozciągania dla poszczególnych prób. W oparciu o uzyskane charakterystyki materiałowe stworzono model, który umożliwił symulację procesu rozciągania z wykorzystaniem metody elementów skończonych w środowisku ABAQUS/Standard.
This paper presents the testing methodology of specimens made of titanium alloy Ti6Al4V in the quasi-static and dynamic conditions. Tests was carried out using the testing machine and the split Hopkinson tensile bar method. The tensile process was analyzed by digital image correlation to give a strain distribution on the specimen surface. Based on data recorded from testing machine and data obtained using the theory of the elastic wave propagation in bars the tensile curves was created for each test. Furthermore the tensile test simulation was carried out using the gained material characteristics in the ABAQUS/Standard environment.
Źródło:: Transport Samochodowy; 2015, 3; 61-80
1731-2795
Pojawia się w:: Transport Samochodowy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 79.

Tytuł:: Aluminum Alloy Development for Wheel Production by Low Pressure Die Casting with New Generation Computational Materials Engineering Approaches
Autorzy:: Yağcı, T.
Cöcen, Ü.
Çulha, O.
Powiązania:: https://bibliotekanauki.pl/articles/2079795.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aluminum alloy
foundry industry
wheels
low pressure casting
materials engineering
mechanical properties
microstructural design
stop aluminium
przemysł odlewniczy
koła
odlewanie niskociśnieniowe
inżynieria materiałowa
właściwości mechaniczne
projektowanie mikrostrukturalne
Opis:: Computational Materials Engineering (CME) is a high technological approach used to design and develop new materials including the physical, thermal and mechanical properties by combining materials models at multiple techniques. With the recent advances in technology, the importance of microstructural design in CME environments and the contribution that such an approach can make in the estimation of material properties in simulations are frequently discussed in scientific, academic, and industrial platforms. Determination of the raw material characteristics that can be modeled in a virtual environment at an atomic scale by means of simulation programs plays a big role in combining experimental and virtual worlds and creating digital twins of the production chain and the products. In this study, a new generation, alternative and effective approach that could be used to the development of Al-Si based wheel casting alloys is proposed. This approach is based on the procedure of optimizing the physical and thermodynamic alloy properties developed in a computer environment with the CME technique before the casting phase. This article demonstrates the applicability of this approach in alloy development studies to produce Al-Si alloy wheels using the low pressure die casting (LPDC) method. With this study, an alternative and economical way is presented to the alloy development studies by trial and error in the aluminum casting industry. In other respects, since the study is directly related to the automotive industry, the reduction in fuel consumption in vehicles is an expected effect, as the new alloy aims to reduce the weight of the wheels. In addition to conserving energy, reducing carbon emissions also highlights the environmental aspects of this study.
Źródło:: Archives of Foundry Engineering; 2021, 21, 4; 35-46
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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