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Wyszukujesz frazę "material structure" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Microstructure and Properties of Laser Additive Deposited of Nickel Base Super Alloy Inconel 625
Autorzy:
Danielewski, H.
Antoszewski, B.
Powiązania:
https://bibliotekanauki.pl/articles/947622.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
laser overlaying welding
Inconel 625
additional material
metallographic structure
napawanie laserowe
materiał dodatkowy
struktura metalograficzna
Opis:
Article presents results of laser overlaying welding of metal powder Inconel 625. Laser metal deposition by laser engineered net shaping (LENS) is modern manufacturing process for low scale production series. High alloy materials such as Inconel 625 nickel based super alloy have high thermal resistant and good mechanical properties, nevertheless it's hard to machining. Plastic forming of high alloy materials such as Inconel 625 are difficult. Due to high strength characteristic performing components made from Inconel alloy are complex, selective melting of metallic powder using laser beam are alternative method for Inconel tooling. Paper present research of additive deposition of spatial structure made from Inconel 625 metallic powder with CO2 laser and integrated powder feeder. Microstructure analysis as well as strength characteristic in normal condition and at elevated temperature was performed. Possibility of using LENS technology for manufacturing components dedicated for work in high temperature conditions are presented.
Źródło:
Archives of Foundry Engineering; 2020, 20, 3; 53-59
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odporność na korozję geopolimeru na bazie popiołu lotnego
Corrosion Resistance of Geopolymer – Based Fly Ash
Autorzy:
Mazur, P.
Mikuła, J.
Kowalski, J. S.
Powiązania:
https://bibliotekanauki.pl/articles/383298.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
materiał innowacyjny
geopolimer
korozja
ochrona antykorozyjna
struktura powierzchni
innovative material
geopolymer
corrosion
anticorrosion protection
surface structure
Opis:
W artykule przedstawiono badania w zakresie nowego materiału inżynierskiego jakim staje się geopolimer. Jest materiałem z którego można tworzyć warstwy ochronne, co prawda posiada dużą zdolność do pochłaniania wilgoci jednak jego skład jest silnie zasadowy i przez to jego nasiąkanie nie wpływa niekorzystnie na chronioną konstrukcję. Badania obejmują wpływ różnych środowisk korozyjnych na zmianę masy badanych próbek w trakcie badania jak również na strukturę powierzchni w skali makroskopowej.
Geopolymer is a material that could form a protective layer on the metal. Geopolymer well as a material absorbing moisture, for example, can be used to control other humidity. Is a material which can easily remove the moisture from the solid material and transport it to the atmosphere. Geopolymer the moisture absorption does not increase its volume. My work contains tables of weights placed in their samples in specific environments. Charts weight change during the study as well as a description and photos of the surface changes. I hope that my work will contribute to increased knowledge about to expand the knowledge of corrosion and its negative impact. It will also help to familiarize yourself with the material that is geopolymer and its properties in different environments.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1 spec.; 83-86
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of Heat Transfer in PCM by Cellular Zn-Al Structure
Autorzy:
Naplocha, K.
Koniuszewska, A.
Lichota, J.
Kaczmar, J. W.
Powiązania:
https://bibliotekanauki.pl/articles/382339.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technology
innovative foundry material
metal cellular foam
porous Zn-Al structure
investment casting
heat transfer
innowacyjna technologia odlewnicza
innowacyjny materiał odlewniczy
pianka metalowa
struktura porowata Zn-Al
odlewanie precyzyjne
wymiana ciepła
Opis:
Development of open cellular metal foam technology based on investment casting applying the polyurethane pattern is discussed. Technological process comprises preparing of the ceramic mold applying PUR foam as the pattern, firing of the mold, pouring of the liquid Zn-Al alloy into the mold and washing out of the ceramic material from cellular casting. Critical parameters such as the temperature of mold and poured metal, design of gating system affected by metalostatic pressure allowed to produce castings with cellular structure characterized by the open porosity. Metal cellular foams with the open porosity embedded in phase change material (PCM) enhance heat transfer and reduce time operations in energy storage systems. Charging and discharging were performed at the laboratory accumulator by heating and cooling with flowing water characterized by the temperatures of 97-100ºC. Temperature measurements were collected from 7 different thermocouples located in the accumulator. In relation to the tests with pure paraffin, embedding of the metal Zn-Al cellular foam in paraffin significantly decreases temperature gradients and melting time of paraffin applied as PCM characterized by the low thermal conductivity. Similarly, reduction of discharging time by this method improves the efficiency of thermal energy storage system applied in solar power plants or for the systems of energy efficient buildings.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 91-94
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of High-Temperature Treatment of Melt on the Composition and Structure of Aluminum Alloy
Autorzy:
Grachev, V. A.
Turakhodjaev, N. D.
Powiązania:
https://bibliotekanauki.pl/articles/382645.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technology
innovative foundry material
heat treatment
aluminum alloy structure
fine-grained microstructure
gasfired arc furnace
electric arc furnace
innowacyjna technologia odlewnicza
innowacyjny materiał odlewniczy
obróbka cieplna
stop aluminium
mikrostruktura drobnoziarnista
piec łukowy elektryczny
piec łukowy gazowy
Opis:
The aim of the current study was to examine the structure of an alloy treated at various temperatures up to 2,000–2,100 °C. Among research techniques for studying alloy structure there were the electron and optical microstructure, X-ray structure, and spectral analysis, and for studying the developed furnace geometric parameters the authors employed mathematical modeling method. The research was performed using aluminum smelting gas-fired furnaces and electric arc furnaces. The objects of the study were aluminum alloys of the brand AK7p and AK6, as well as hydrogen and aluminum oxide in the melt. For determining the hydrogen content in the aluminum alloy, the vacuum extraction method was selected. Authors have established that treatment of molten aluminum alloy in contact with carbon melt at high temperatures of 2,000–2,100 °C has resulted in facilitating reduction of hydrogen and aluminum oxide content in the melt by 40-43% and 50-58%, respectively, which is important because hydrogen and aluminum oxide adversely affect the structure and properties of the alloy. Such treatment contributes to the formation of the extremely fine-grained microstructure of aluminum alloy.
Źródło:
Archives of Foundry Engineering; 2017, 17, 4; 61-66
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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