Wszystkie pola: nonmetallic inclusions - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Study of Nonmetallic Inclusions in Aluminum–Silicon Alloys
Autorzy:: Galek, Tomasz
Łączek, Andrzej
Łysiak, Karol
Powiązania:: https://bibliotekanauki.pl/articles/176066.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aluminum–silicon alloy
nonmetallic inclusions
scanning electron microscopy
X-ray tomography
Opis:: In this article, a study of nonmetallic inclusions introduced during the casting process of the aluminum–silicon alloy is presented. The samples were investigated using a scanning electron microscope to find the chemical composition and X-ray tomography to check the volumetric content of the non-metallic inclusions. The samples were made from AlSi₇Mg alloy, used for car wheels, with 7% weight content of Si, 89% of Al, and 0.3% of Mg. The main goal of our investigations was to find out the chemical composition of the impurities and to identify the stage of the casting process at which the impurities are introduced.
Źródło:: Advances in Manufacturing Science and Technology; 2020, 44, 1; 28-31
0137-4478
Pojawia się w:: Advances in Manufacturing Science and Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Nonmetallic Inclusions in a New Alloy for Single-Crystal Permanent Magnets
Autorzy:: Belyaev, I. V.
Bazhenov, V. E.
Kireev, A. V.
Moiseev, A. V.
Powiązania:: https://bibliotekanauki.pl/articles/383082.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: magnetic alloy
single crystals
nonmetallic inclusions
formation mechanism
stop magnetyczny
monokryształ
wtrącenia niemetaliczne
Opis:: The morphology, chemical composition and formation mechanism of non-metallic inclusions in magnetic alloy of Fe-Co-Ni-Cu-Al-Ti-Hf system were investigated. These alloys are used in manufacturing single-crystal permanent magnets. Modern methods for the identification of non-metallic inclusions, as well as computer simulation of the processes of their formation by Thermo Calc software were used in the work. It was found that studied alloy contains (Ti, Hf)S titanium and hafnium sulfides, (Ti, Hf)₂SC titanium and hafnium carbosulfides, Ti₂O₂S titanium oxisulfide, HfO₂ hafnium oxide, and Al₂O₃ aluminum oxide. No titanium and hafnium nitrides were found in the alloy. The bulk of nonmetallic inclusions are (Ti, Hf)₂SC carbosulfides and (Ti, Hf)S sulfides. All carbides and many oxides are within carbosulfides and sulfides. When the sulfur content in the alloy is no more than 0.2%, and carbon content does not exceed 0.03%, carbosulfides are formed in the solidification range of the alloy and has an faceted compact form. If the sulfur content in the alloy becomes more than 0.2% and carbon content more than 0.03%, the carbosulfide formation begins before the alloy solidification or at the beginning stages of solidification. In this case, carbosulfides are dendritic and coarse. Such carbosulfides actively float in the solidified melt and often come to the surface of the castings. In this case, specific surface defects are formed in single-crystal magnets, which are called sulfide stains. All titanium and hafnium sulfides are formed at the lower part of solidification range and have elongated shape.
Źródło:: Archives of Foundry Engineering; 2018, 18, 2; 11-14
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Efficiency of Aluminum Oxide Inclusions Removal from Liquid Steel as a Result of Collisions and Agglomeration on Ceramic Filters
Autorzy:: Kalisz, D.
Kuglin, K.
Powiązania:: https://bibliotekanauki.pl/articles/947631.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: filtration
nonmetallic inclusions
efficiency of collisions
PSG method
filtracja
wtrącenia niemetaliczne
metoda PSG
Opis:: Filtration is one of the most efficient methods of removing Al2O3 inclusions from liquid steel. The efficiency of this process depends on the physicochemical parameters of liquid metal, inclusion and properties of the applied filters. The particles attracted during filtration undergo agglomeration, collisions and chemical reactions on the filter surface, with the emphasis on the mechanism of particle collisions and the role of material from which the filter was made. The aluminum oxide inclusions collide with the filter surface and as the growing process continues, the particles also collide with the previously adsorbed inclusions. At the interface of particle and filter the mixing of the metal bath is most intense, being a result of a sudden change of flow direction and breaking up the stream of liquid metal which is in a direct contact with material. The efficiency of filtration is defined not only by the behavior of individual particles but of all population. The simulations revealed that only a small fraction of these particles adheres directly to the filter material; most of them stick to the former ones. Attention should be also paid to the fact that some of the inclusions which contacted the filter walls do not form a permanent connection and are then entrained by metal. Authors solved the problem of agglomeration and collisions of Al2O3 inclusions with the ceramic surface of the filter with the PSG method, mainly used for the analysis of agglomeration of inclusions during steel refining in the ladle.
Źródło:: Archives of Foundry Engineering; 2020, 20, 2; 43-48
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of nonmetallic inclusions on microbreaks formation in wheel steel and railway wheels
Wpływ wtrąceń niemetalowych na powstanie mikropęknieć w stalach kołowych i kołach kolejowych
Autorzy:: Gubenko, S.
Proidak, Y.
Kozlovsk'yy, A.
Shramko, O.
Is'kov, M.
Powiązania:: https://bibliotekanauki.pl/articles/374679.pdf
Data publikacji:: 2008
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: koło kolejowe
mikropęknięcia
railway wheels
microbreaks
Opis:: It is well known that formation of defects of many types during railway wheels service somehow or other is connected to nonmetallic inclusions in wheel steel. Microbreakes connected with nonmetallic inclusions have different origin. The first one is "deformational", the second is "thermal" and the third is "hydrogenous". The objective of this work is the study of nature of microbreaking in wheel steel relative to nonmetallics. Mechanisms of microbreaking of all types near different nonmetallics had been investigated and their influence on safety threshold of railway wheels had been analyzed herein.
Źródło:: Transport Problems; 2008, 3, 3; 77-81
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Review of Titanium Related Inclusions in Casting of Steel
Autorzy:: Sheikh, Ali R.
Powiązania:: https://bibliotekanauki.pl/articles/27314163.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: titanium oxide
nonmetallic inclusions
titanium nitrides
titanium carbonitrides
manganese sulphide
tlenek tytanu
wtrącenia niemetaliczne
azotek tytanu
węglikoazotki tytanu
siarczek manganu
Opis:: The general area of understanding is inclusions in steel both metallic and nonmetallic in nature. This work has also used the concepts of inclusions in steel in general other than Ti however mainly the research works done on precipitation, solute segregation, grain developments and equilibrium aspects of important inclusions like Ti in steel have been probed. Interaction of inclusions with slag oxides has also been incorporated. Interdependence of elements common in-between many inclusions has been marked. TiN, TixOy and MnS inclusions have been very outstanding in the confines of present research. Ratios and effective concentration have been highlighted in certain cases around the topic. Type of steels, compositions of the constituent elements and temperature correlation has been spotted in certain environments. A suggestive relation with the steel properties has also been inferred. Hardness, corrosion behaviour and strength stand out to be the parameters of vital importance when considering Ti inclusions in the form of either TiN or TixOy. Certain inclusions like MnS seem to nucleate on TiN inclusions and there is a correlation evident certainly in case of complex alloys.
Źródło:: Archives of Foundry Engineering; 2023, 23, 2; 127--136
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Numerical analysis of the effect of nonmetallic inclusionslocation in carburized layer of 16MNCR5 steel on initiation of fatigue cracking
Autorzy:: Lipa, Sebastian
Powiązania:: https://bibliotekanauki.pl/articles/102583.pdf
Data publikacji:: 2018
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: non-metallic inclusions
fatigue
thermo-chemical treatment
FEM simulation
wtrącenia niemetaliczne
zmęczenie
obróbka termochemiczna
symulacje FEM
Opis:: This paper presents the results of a numerical analysis of the effect of the position of non-metallic inclusions in a hardened top layer in 16MnCr5 steel on the mechanism of fatigue destruction. An analysis of a hardened layer formed by thermo-chemical treatment using FineCarb® technology was conducted.Non-metallic inclusions formed by deoxidation of steel were studied; they are usually made of calcium and aluminum. Four positions of inclusions in the hardened layer were tested: under the layer, in the middle part of the layer, under the surface and on the border of two sublayers. The results of the FEM analysis were treated as a qualitative analysis. A map of plastic strains around the inclusion under study was observed. The appearance of plastic strains in the area under analysis signaledthe initiation of a fatigue crack. It was observed that the mechanism of destruction depends largely on the distribution of stress in the top layer and on the place where the inclusion is anchored in the layer. Inclusions under the layer were found to be the main cause of the loss of the structural continuity, which explains the most frequent cases of the initiation of fatigue cracks.
Źródło:: Advances in Science and Technology. Research Journal; 2018, 12, 3; 66-74
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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