Temat: Elektron 21 - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The influence of casting defects on fatigue resistance of elektron 21 magnesium alloy
Autorzy:: Pikos, I.
Kiełbus, A.
Adamiec, J.
Powiązania:: https://bibliotekanauki.pl/articles/383305.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: casting defect
mechanical properties
microstructure
magnesium alloy
Elektron 21 alloy
wada odlewu
właściwości mechaniczne
mikrostruktura
stop magnezu
stop Elektron 21
Opis:: The Mg-RE alloys are attractive, constructional materials, especially for aircraft and automotive industry, thanks to combination of low density, good mechanical properties, also at elevated temperature, and good castability and machinability. Present paper contains results of fatigue resistance test carried out on Elektron 21 magnesium alloy, followed by microstructural and fractographical investigation of material after test. The as-cast material has been heat treated according to two different procedures. The fatigue resistance test has been conducted with 10⁶ cycles of uniaxial, sine wave form stress between 9 MPa and 90 MPa. Fractures of specimens, which ruptured during the test, have been investigated with scanning electron microscope. The microstructure of specimens has been investigated with light microscopy. Detrimental effect of casting defects, as inclusions and porosity, on fatigue resistance has been proved. Also the influence of heat treatment's parameters has been described.
Źródło:: Archives of Foundry Engineering; 2013, 13, 2; 103-106
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Mould components impact on structure and quality of elektron 21 alloy
Autorzy:: Dybowski, B.
Kiełbus, A.
Jarosz, R.
Powiązania:: https://bibliotekanauki.pl/articles/379489.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: metallography
Elektron 21 alloy
quantitative metallography
casting defects
mould technology
metalografia
stop Elektron 21
metalografia ilościowa
wada odlewu
technologia odlewnicza
Opis:: Magnesium alloys due to their low density and high strength-to-weight ratio are promising material for the automotive and aerospace industries. Many elements made from magnesium alloys are produced by means of sand casting. It is essential to investigate impact of the applied mould components on the microstructure and the quality of the castings. For the research, six identical, 100x50x20mm plates has been sand cast from the Elektron 21 magnesium casting alloy. Each casting was fed and cooled in a different way: one, surrounded by mould sand, two with cast iron chills 20mm and 40mm thick applied, another two with the same chills as well as feeders applied and one with only the feeder applied. Solid solution grain size and eutectics volume fraction were evaluated quantitatively in Met-Ilo program, casting defects were observed on the scanning electron microscope Hitachi S3400N. The finest solid solution grain was observed in the castings with only the chills applied. Non metallic inclusions were observed in each plate. The smallest shrinkage porosity was observed in the castings with the feeders applied.
Źródło:: Archives of Foundry Engineering; 2013, 13, 2; 17-23
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Development of manufacturing method of the MAP21 magnesium alloy prepared by selective laser melting (SLM)
Autorzy:: Gruber, Konrad
Mackiewicz, Adrianna
Stopyra, Wojciech
Dziedzic, Robert
Kurzynowski, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/306572.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: SLM
Elektron 21
mikrostruktura
parametry procesowe
MAP21
microstructure
processing parameters
Opis:: Magnesium alloys are well known for their biocompatibility and biodegradable properties [9], [27] owing to the fact that magnesium is a mineral crucial for human body, especially for bone tissue. There are studies [17] on using WE43 additively manufactured magnesium scaffolds for full bone and soft tissue regeneration. Moreover, magnesium implants in bones were investigated as having higher bone-implant interface strength than titanium ones [3]. In this paper, the results of the studies on MAP21 magnesium powder selective laser melting process optimization as a starting point for further bioapplications are presented. MAP21 magnesium alloy owing to its high mechanical properties, excellent vibration damping characteristic and good creep resistance is a promising material to be tested for scaffold structures. The study for the first time shows successful SLM manufacturing of dense samples made of MAP21 alloy. Using an algorithm based on design of experiment (DoE) method [21], the SLM process parameters were designated. The porosity was investigated as a SLM process optimization parameter. High density of produced sample, up to 99%, was achieved. Microstructure and oxidation level after selective laser melting (SLM) manufacturing were characterized. Fine grain microstructure and three kinds of precipitations were found Nd (Gd, Zr, Mg), Mg (Nd, Gd, Zr) and Mg (Zr, Nd, Gd, Zn)). In order to determine the mechanical properties of MAP21 alloy processed with SLM technology, static tensile tests and microhardness tests were conducted, resulting in mechanical properties (Rm = 167 MPa, E = 38.6 GPa, 63–74 HB) comparable with as-cast alloy. A discussion was held on further research opportunities for biomedical use of SLM-ed MAP21 alloy.
Źródło:: Acta of Bioengineering and Biomechanics; 2019, 21, 4; 157-168
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of sand-casting parameters on microstructure and properties of magnesium alloys
Wpływ parametrów odlewania grawitacyjnego na mikrostrukturę i właściwości stopów magnezu
Autorzy:: Kiełbus, A.
Stopyra, M.
Jarosz, R.
Powiązania:: https://bibliotekanauki.pl/articles/351914.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Mg alloys
sand casting
modification
Elektron 21 magnesium alloy
WE43 magnesium alloy
properties
fluidity
stopy Mg
odlewy piaskowe
modyfikacja
Elektron 21
WE43
właściwości
płynność
Opis:: The paper present the influence of modifying process on chemical composition, microstructure, and selected properties of Mg alloys. Two sand-casting creep-resistant alloys, Elektron 21 and WE43, were analyzed in various forms: without modifiers, with the amount of modifier suggested by the producer, and with this amount increased by 50% and 100%. The volume fraction of eutectic areas, tensile strength, and yield strength were measured and the fluidity and linear contraction were analyzed. The research shows that, in contrast to what is widely assumed to be a positive influence of rare-earth elements on Mg alloys properties, a large increase in the amount of modifiers does not always lead to an improvement in the alloy properties. However, the results are tentative because they may have been influenced by the melting technology used, which can be improved. Rare-earth elements tend to react with fluxes, which could lead to a decrease in mechanical properties and fluidity. More research is planned wherein the alloys are melted under a protective atmosphere.
W artykule zaprezentowano wpływ modyfikacji odlewniczych stopów magnezu na skład chemiczny, mikrostrukturę i wybrane właściwości. Badano 2 stopy odlewane do form piaskowych, przeznaczone do pracy w podwyższonej temperaturze: Elektron 21 i WE43 w czterech wariantach: bez modyfikacji, z ilością modyfikatorów dodaną zgodnie z procedura zalecana przez producenta, powiększona o 50 i 100%. Wykonano ilościową analizę udziału objętościowego eutektyk, zmierzono wytrzymałość na rozciąganie, granice plastyczności, wykonano próbę lejności oraz skurczu liniowego. Wykazano, że mimo powszechnie uznanego za pozytywny wpływu metali ziem rzadkich na właściwosci stopów Mg dodawanie zwiększonych ilości modyfikatorów w stosunku do zaleceń producentów nie zawsze ma dobry wpływ na wyniki. Prawdopodobnie duży wpływ na wyniki badań miała technologia odlewania, wymagająca poprawy - zastosowane topniki mogą reagowac z pierwiastkami stopowymi i powodować obniżenie właściwości mechanicznych i lejności. W przyszłości planowane są podobne badania dla stopów topionych w atmosferze gazowej.
Źródło:: Archives of Metallurgy and Materials; 2013, 58, 2; 635-640
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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