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Wyszukujesz frazę "artificial ageing" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Study of the Properties of the AlSi9Cu3 Alloy Depending on the Ratio of Returnable Material in the Batch
Autorzy:
Matejka, M.
Bolibruchová, D.
Chalupová, M.
Powiązania:
https://bibliotekanauki.pl/articles/2049423.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si-Cu cast alloys
natural and artificial ageing
metallography
mechanical properties
hot tearing
Opis:
Recycling of aluminium returnable material through its reuse is now an essential component of the production of aluminium alloy castings. The main goal is to find a suitable ratio of the primary alloy and the returnable material in the batch, thus determining the right compromise between the price and the quality of the casting. Experimental alloys were evaluated by thermal analysis, combination of structural analytical techniques and selected mechanical properties. The alloys were also subjected to tearing susceptibility testing. The increase in the returnable material amount resulted in changes in the alloy properties at the first increase in volume to 20%. After exceeding the balanced ratio (50:50), there was considerable degradation of the microstructure, failure to achieve the minimum values of some mechanical properties required by the standard, and the alloy showed increased susceptibility to tearing.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 15-23
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Natural and Artificial Ageing on Multiply Remelted AlSi9Cu3 Alloy
Autorzy:
Matejka, M.
Bolibruchova, D.
Powiązania:
https://bibliotekanauki.pl/articles/382708.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
remelting
Fe phases
artificial ageing
natural ageing
eutectic silicon
przetapianie
fazy Fe
sztuczne starzenie
naturalne starzenie
krzem eutektyczny
Opis:
This article focuses on the study of the influence of remelting and subsequent natural and artificial ageing on the structure of recycled AlSi9Cu3 alloy with increased iron content. The assessed changes in eutectic silicon and iron-based intermetallic phases were carried out using optical and scanning electron microscopy. The degradation of the eutectic silicon morphology due to remelting occurred only at the highest numbers of remelting. The effect of remelting the investigated alloy, which is accompanied by a gradual increase in wt. % Fe, began to manifest significantly through a change in the length of the ferric phases after the fourth remelting. As expected, the artificial ageing process has proven to be more effective than natural ageing. It has led to a change in the eutectic silicon morphology and has been beneficial in reducing the lengths of adverse ferric phases. The use of alloys with higher numbers of remelting, or with greater “contamination”, for the manufacture of shape-challenging castings is possible when using a suitable method of eliminating the negative factors of the remelting process. The results of our investigation show a suitable method of the above elimination the application of heat treatment T5 – via artificial ageing.
Źródło:
Archives of Foundry Engineering; 2019, 2; 60-66
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of the Use of Full Body Harnesses on Their Protective Properties
Autorzy:
Baszczyński, K.
Jachowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/90568.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
personal protective equipment against falls from a height
full body harnesses
natural and artificial ageing
destructive factors
Opis:
A full body harness is a component of personal systems protecting against falls from a height. To ensure users’ safety, the harness must retain its protective properties during its whole service period. All the elements of a harness (webbings, threads, metal buckles, etc.) are exposed to destructive factors. Harnesses stored and used for a few years were tested. The paper discusses the most frequent types of damage and their effect on the essential resistance parameters. The effect of atmospheric conditions, sunlight, mechanical damage and dust on the parameters of webbings was tested. Conclusions on the main causes of the loss of the protective properties of harnesses are drawn; periodic checks of the physical conditions and guidelines for estimating acceptable service time are recommended.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 4; 435-446
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strength and optical properties of papers subjected to artificial light ageing
Autorzy:
Gajadhur, M.
Skrzydelska, R.
Powiązania:
https://bibliotekanauki.pl/articles/115796.pdf
Data publikacji:
2012
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
artificial light ageing
light fastness
colour coordinates
paper printing bases
long-lived paper
Opis:
The paper presents strength and optical properties of selected paper printing bases put to operational use such as artifi cial light ageing. The process infl uences signifi cantly the quality of printing products. The aim of the experiments performed was to reveal the changes occurring in paper during diff erent stages of its operational use. The results obtained enabled to compare the strength and optical properties of the tested bases exposed to light with those found for the paper referred to as “long-lived paper”.
Źródło:
Challenges of Modern Technology; 2012, 3, 3; 15-18
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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