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Analytical Electron Microscopy Investigation of Topologically Close-Packed Phases in CMSX-4 Single Crystal Superalloy

100%
Dubiel B., Indyka P., Kalemba-Rec I., Moskalewicz T.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
1110-1113
EN
In this work the topologically close-packed phases precipitated during annealing of CMSX-4 single-crystal superalloy at temperature 1100°C were investigated. Microstructural analyses were carried out by means of scanning- and transmission electron microscopy as well as scanning-transmission electron microscopy in high angle annular dark field mode. Chemical composition in nanoareas was determined using energy dispersive X-ray spectroscopy. Scanning electron microscopy investigation has shown that the topologically close-packed precipitates were formed already after 50 h of annealing at temperature 1000°C. With prolongation of the annealing time up to 2500 h the change of the morphology of topologically close-packed particles from blocky to needle-like occurred. Selected area electron diffraction analysis indicated that the topologically close-packed precipitates are the orthorhombic P phase. Quantitative energy dispersive X-ray spectroscopy analysis revealed that the topologically close-packed precipitates are enriched mostly in Re and W.
2
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Manufacturing, Microstructure and Corrosion Resistance of Electrophoretically Deposited SiO2 and Ni/SiO2 Coatings On X2CrNiMo17–12–2 Steel

100%
Ratajski T., Kalemba-Rec I., Dubiel B.
Archives of Metallurgy and Materials
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2016
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issue 2
3
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Influence of PAA on the Microstructure and Corrosion Resistance of Electrophoretically Deposited SiO2 and Ni/SiO2 Coatings on X2CrNiMo17-12-2 Steel

100%
Ratajski T., Kalemba-Rec I., Dubiel B.
Archives of Metallurgy and Materials
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2017
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vol. 62
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issue 4
4
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Analytical Electron Microscopy Studies of the CMSX-4 Single Crystal Superalloy Subjected to High Temperature Annealing

100%
Dubiel B., Indyka P., Kalemba-Rec I., Moskalewicz T.
Acta Physica Polonica A
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2017
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vol. 131
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issue 5
1375-1378
EN
The aim of the present work is to investigate the development of the γ/γ' microstructure and the changes in chemical composition of γ and γ' phases during high temperature annealing of CMSX-4 superalloy at a temperature of 1100°C in the time range from 500 to 2500 h. The studies were performed by means of scanning electron microscopy and the modern scanning-transmission electron microscopy with Super-X EDS system of four SDD detectors. Results of scanning electron microscopy and scanning-transmission electron microscopy analyses have shown that the microstructure of CMSX-4 superalloy is unstable during ageing at high temperature and the coalescence of cuboidal γ' precipitates was observed. Energy dispersive X-ray microanalysis revealed the distribution of particular alloying elements in the γ and γ' phases and the differences in their concentration in the function of the annealing time.
5
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Investigations of Friction Stir Welds between 5083 and 7075 Aluminum Alloys Using EBSD and X-Ray Techniques

100%
Kalemba-Rec I., Wróbel M., Kopyściański M.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
996-999
EN
Microstructure and texture of the friction stir welded 5083 and 7075 aluminum alloys were characterized by means of the electron backscatter diffraction and X-ray techniques. A complex vortex-like microstructure with distinctive bands of the both joint materials was found in the centre of the weld. The alternating bands filled roughly equiaxed dynamically recrystallized grain volumes. The grain size was slightly smaller in bands of the alloy 7075 than in bands of the alloy 5083. Grains in the thermomechanically affected zone were elongated, especially on the retreating side of the weld (7075 alloy). On the other hand, the grain shape in the heat affected zone was similar to that for the base material.
6
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Surface Characterization of 309 and 310 Steel after the Corrosion in Wood Biomass Ash

88%
Dębowska A., Kopia A., Kalemba-Rec I., Petrzak P., Magdziarz A.
Acta Physica Polonica A
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2017
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vol. 131
|
issue 5
1387-1389
EN
The aim of this study was to investigate the influence of biomass ashes - specifically wood biomass ash - on the surface of austenitic stainless steel 309 and 310. The process was carried out for 1000 h at 650°C. The microstructure and chemical composition of corrosion products were examined by scanning electron microscopy with energy dispersive spectroscopy analysis. Phase analysis of corrosion product were done by X-ray diffraction and ash composition was investigated by X-ray fluorescence. It was observed that wood biomass ash caused the corrosion of the steel surface. On the surface of the steels exposed to wood biomass ash the layer of corrosion products was observed, mostly chromium, nickel and iron oxide. The thickness of mill scale formed during the process was in the range of h=15-30 μm.
7
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The Effect of Low Deformation Asymmetric Rolling on Microstructure and Texture of the Polycrystalline Copper

64%
Uniwersał A., Wróbel M., Wroński S., Kalemba-Rec I., Wroński M., Wierzbanowski K., Baczmański A., Bacroix B.
Archives of Metallurgy and Materials
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2016
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issue 4
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