Metallurgy and Foundry Engineering
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ISSN 1230-2325
e-ISSN: 2300-8377
Issue Date
2018
Volume
Vol. 44
Number
No. 3
Description
Journal Volume
Metallurgy and Foundry Engineering
Vol. 44 (2018)
Projects
Pages
Articles
Influence of $Ho^{+}$ ions for quantitation of iron (Fe) in 0.1 M HCl solution using microwave plasma-atomic emission spectrometry (MP-AES)
(Wydawnictwa AGH, 2018) Stępień, Michał; Bukowska, Andżelika
During research work in the Non-Ferrous Metals Department on AGH University of Science and Technology concerning new corrosion inhibitors for iron alloys in magnetic fields, Ho?+ ions were proposed as one of the new inhibitors. One of the methods for determining the rate of the corrosion process is determining the concentration of Fe ions in a solution. Due to the required high precision of determining the concentration of Fe ions in a solution contains Ho?+ ions with a wide range of concentrations, the influence of the matrix effect and interferences of Ho?+ ions must be known. The present work investigates the impact of Ho ions within a range of 0 to 100 mg/L for the quantitation of Fe ions in a 0.1 M HCl solution using the MP-AES method. The obtained results were analyzed using the single-factor ANOVA method. In a range of up to 40 mg/L, Ho?+ ions are not a significant factor to determining the Fe concentration by MP-AES.
Research on copper recovery from sledge from suspended copper concentrate reduction process
(Wydawnictwa AGH, 2018) Romankiewicz, Remigiusz; Romankiewicz, Ferdynand
The research on the dispersal of slag from the slurry process was carried out in a laboratory resistance furnace. Before declaring, the slag contained 13.62% copper. In the processes of reduction of slag samples with calcium carbide in the form of carbide with activating additives Na?CO? and CaF?, the content of copper in the slag was reduced to a level of 0.28-0.63% Cu. The polymetallic melt formed after the decoupling of the slag contained 78.55-84.9% Cu, 10.8-16.48% Pb, and 0.08-0.39% Fe.
Analysis of influence of process parameters on temperature distribution in profiles extruded from 6xxx-series aluminum alloys
(Wydawnictwa AGH, 2018) Berski, Szymon Arkadiusz; Krakowiak, Marlena; Bajor, Teresa; Kawałek, Anna; Jurczak, Henryk
Changing market preferences regarding expectations in terms of the functionality, properties, and appearance of a finished product place excessive demands on manufacturers. The 6xxx-series alloys are the most commonly used in extrusion, and they have broad applications (e.g., the construction, electronics, automotive, and shipbuilding industries). The development of deformation technology at the design stage reaps unquestionable benefits when planning the production process. Under real conditions, the extrusion of hollow profiles requires the use of pocket dies, whose proper design is a complex process. This paper presents the results of preliminary numerical investigations of the extrusion process of structural panels from the 6005A aluminum alloy intended for the construction of transport car bodies. The influence of selected parameters of the extrusion process on the temperature distribution was analyzed in the material. The calculations were made using FEM for a three-dimensional deformation state, taking into account the thermal phenomena occurring during the applied deformation scheme in the extrusion process carried out in a flat die.
Non-invasive analysis and visualization of objects from FSW AlSi9Mg/2017A aluminum alloy joints
(Wydawnictwa AGH, 2018) Wójcicka, Anna; Mroczka, Krzysztof; Kowalski, Marcin
Friction stir welding (FSW) technology allows for the welding of materials that differ in their chemical compositions, microstructures, and properties. When selecting the parameters, it is necessary to analyze the structure of a weld and eliminate the defects. The use of X-ray microtomography creates the possibility of precise imaging of a joint structure - especially when it contains defects (voids). The tests were carried out on an FSW joint made with both 2017A and AlSi9Mg aluminum alloys. The macrostructure was cross-sectional, and a defect was found in the middle part of the joint and on the advancing side. We used a conventional method of observation light microscopy. Then, an analysis was performed using X-ray microtomography, which revealed the shape of the defect in 3D. Individual cross-sections were extracted, which enabled us to measure the geometric quantities. A dependence was found for the shape of the defect on the welding parameters and the variability of its construction. The usefulness of this advanced material imaging technology for the analysis of FSW welds has been confirmed.