Metallurgy and Foundry Engineering
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ISSN 1230-2325
e-ISSN: 2300-8377
Issue Date
2018
Volume
Vol. 44
Number
No. 2
Description
Journal Volume
Metallurgy and Foundry Engineering
Vol. 44 (2018)
Projects
Pages
Articles
Thermophysical properties of 904L austenitic steel
(Wydawnictwa AGH, 2018) Nasiłowska, Barbara; Bogdanowicz, Zdzisław; Terpiłowski, Janusz; Pańcikiewicz, Krzysztof
This paper presents the results of the structural investigations and thermophysical properties of 904L steel parent material. Experimental studies on the structure of 904L steel proved a pure austenitic structure. Both the experimental research and analysis of the thermophysical properties of 904L steel were complemented with the results of the thermal conductivity calculations for the tested material. The paper presents a brief description of the measurements, the procedures for evaluating the data, and a set of the obtained results.
Annealing effect on microstructure and chemical composition of Inconel 625 alloy
(Wydawnictwa AGH, 2018) Petrzak, Paweł; Kowalski, Kazimierz; Rozmus-Górnikowska, Magdalena Monika; Dębowska, Aleksandra; Jędrusik, Mateusz; Koclęga, Damian
Our research focused on Inconel 625 weld overlays on 16Mo3 steel boiler pipes. The investigation focused on the characterization of changes in the microstructure and chemical composition after annealing. The annealing was performed for ten hours at temperatures from 600 to 1000°C. Changes in the microstructure were observed with a scanning and transmission electron microscope (SEM and TEM). The investigation was supplemented by hardness measurements.
Electrodeposition of silver from nitrate-tartrate solutions
(Wydawnictwa AGH, 2018) Rudnik, Ewa
The electrodeposition of silver from AgNO3 solutions with the addition of L-tartaric acid was investigated. The cathodic reaction was accompanied by low electrode polarization and run under activation control for AgNO3 concentrations of above 70 mM. Tartaric acid only slightly shifted the polarization curves towards more electronegative potentials (by approx. 50 mV), but it did not change the rate-determining step. The activation control of the process resulted in the formation of rough and coherent deposits, while the mixed or diffusion control of the process promoted the formation of dendritic-like structures and spongy deposits.
Effect of texture on deformation mode in magnesium and AZ61 alloy
(Wydawnictwa AGH, 2018) Sułkowski, Bartosz
The effect of the initial texture on the deformation mode and mechanical properties was studied in magnesium and its AZ61 alloy. Both materials had a very similar initial texture. Two cases were investigated: samples with a texture where the basal slip system was blocked, and samples having a texture where the basal slip system was allowed to activate. The samples were deformed by compression at room temperature at a strain rate of 10?3 s?1. It was found that the initial texture had a very strong impact on the deformation mode in magnesium, however, there was no effect of the initial texture on the deformation mode in the case of AZ61. The investigations were compared to simulations of texture evolution using the Taylor model. From the simulations, the Taylor factor and slip system activity were obtained. It was found that, in the case of magnesium, twinning or slip (both basal and non-basal) are the two main deformation modes, while in the case of AZ61, slip is the only main deformation mechanism despite the initial texture. The impact of the initial texture is discussed in more detail in the present study.