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1
Content available Evaluation of the Possibility of Applying Thermal Barrier Coatings to AlSi7Mg Alloy Castings
Mróz Marek, Rąb Patryk
Archives of Foundry Engineering
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2023
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Vol. 23, iss. 3
104--109
EN
This paper analyses the possibility of applying thermal barrier coatings (TBCs) onto a substrate made of the AlSi7Mg alloy, intended for, among other things, internal combustion engine components. Engine components made of aluminum-silicon alloys, especially pistons and valve heads, are exposed to high temperature, pressure and thermal shock resulting from the combustion of the fuel-air mixture. These factors cause degradation of these components and can lead to damage. To minimize the risk of damage to engine components caused by heat stress, one way is to apply TBCs. Applying TBCs coatings to engine components improves their durability, increases power output and reduces fuel consumption. The research scope includes the application of an Al2O3-TiO3 coating via the APS (Air Plasma Spraying or Atmospheric Plasma Spraying) method onto a substrate of the AlSi7Mg alloy, analysis of the microstructure and chemical composition of the substrate and coating material, and assessment of the quality of the coating's bond with the AlSi7Mg alloy substrate using the scratch test method.
2
Content available Investigation of multilayer coating of EN AW 6060 – T66 using friction surfacing
Krall Stephan, Baumann Christian, Agiwal Hemant, Bleicher Friedrich, Pfefferkorn Frank
Journal of Machine Engineering
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2022
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Vol. 22, No. 3
44--58
EN
The objective of this research is to investigate observable process changes during multi-layer friction surfacing of EN AW 6060 aluminum, whether for repair, remanufacturing, or new part manufacturing. In this study, friction surfacing was performed with a 10-mm-diameter rod of EN AW 6060 aluminum at spindle speeds ranging from 1000 to 7000 rpm to create up to three layers of 40-mm-long deposits on a substrate of the same alloy. The process forces and layer temperatures were observed. Post-process measurement of flash geometry, layer geometry and microhardness were conducted with the motivation to understand the impact of multi-layer depositions on performance and identifying acceptable conditions required to achieve acceptable build quality. The thickness, deposition and joining efficiency of layers in the multilayer configuration remained consistent. Friction surfacing of EN AW 6060 aluminum allowed for high deposition rates of 9 kg/hr, when compared to other metal additive technologies.
3
Content available Physical Modelling of the Production of an Alloy Vapour Source for the Synthesis of Dielectric Material
Nadolski M., Stradomski G., Zdunek K., Okrasa S.
Archives of Metallurgy and Materials
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2020
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Vol. 65, iss. 1
201--206
EN
The paper reports the results of a physical modelling study of the production of a hypereutectic aluminium alloy to be used formaking an alloy vapour source for operation in the magnetron. Within the study, targets from a hypereutectic aluminium-silicon alloy were made in laboratory conditions. Thus obtained material was subjected to heat treatment, porosity analysis, and the assessment of the microstructure and fitness for being used in the magnetron. The process of melting the hypereutectic Al-Si alloy was carried out at the Department of Foundry of the Czestochowa University of Technology. The investigation into the production of the alloy vapour source for the synthesis of the dielectric material from the hypereutectic aluminium alloy has confirmed.
4
Content available remote Influence of refining process on the porosity of high pressure die casting alloy Al-Si
Orłowicz A. W., Mróz M., Tupaj M., Betlej J., Płoszaj F.
Archives of Foundry Engineering
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2009
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Vol. 9, iss. 2
35-40
EN
This study presents research results of the influence that refining and transfer of AlSi12S alloy on the porosity of high pressure die-castings. Tests were conducted under production conditions of Die-casting Foundry META-ZEL Sp z o.o. The operation of refining was conducted in a melting furnace, with the use of an FDU Mini Degasser. Decay of the refining effect was assessed by evaluating the porosity content and metallographic examination.
5
Content available remote Design changes of device to investigation of alloys linear contraction and shrinkage stresses
Mutwil J.
Archives of Foundry Engineering
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2009
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Vol. 9, iss. 4
149-156
EN
Some design changes in device elaborated by author to examination of linear contraction and shrinkage stresses progress of metals and alloys during- and after solidification have been described. The introduced changes have been focused on design of closing of shrinkage test rod mould. The introduced changes have been allowed to simplify a mounting procedure of thermocouples measuring a temperature of the shrinkage rod casting (in 6 points). Exemplary investigation results of linear contraction and shrinkage stresses development in Al-Si13.5% alloy have been presented.
6
Content available remote Przepływ siluminu AK12 w kanałach metalowych form odlewniczych
Mutwil J., Niedźwiecki D.
Archiwum Odlewnictwa
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2001
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R. 1, nr 1
169--176
PL
Opisano podstawowe cechy przepływu siluminu AK12 w prostych kanałach form metalowych. Oceniono wpływ parametrów zalewania, a także zabiegu modyfikacji fosforem, na cechy przepływu.
EN
The basic attributes of the AK12 aluminum-silicon alloys flow in the straight channels of metal moulds have been presented. The influence on the flow attributes of both the pouring parameters and the modification treatment has been estimated.
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