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2 Acta Physica Polonica A

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Analysis of Phase Transformations in Inconel 625 Alloy during Annealing

100%

Petrzak P. , Kowalski K. , Blicharski M.

nr 4

1041-1044

The investigation focused on the characterization of the microstructure and chemical composition changes after annealing. The research was conducted on the Inconel 625 weld overlay deposited on a boiler steel. The annealing was performed for 10 h at temperatures from 600 to 1000°C. The microstructure and chemical composition were examined by scanning electron microscope and transmission electron microscope equipped with an energy dispersive X-ray spectrometer. Weld overlays were produced by an innovative method of cold metal transfer.

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

2017

tom 131

nr 5

1387-1389

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.