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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.

Cross Sections for l-Mixing of K(n^{2}F) States in Collisions with Ground-State K(4^{2}S) Atoms

75%

Głódź M. , Huzandrov A. , Klavins J. , Sydoryk I. , Szonert J. , Gateva-Kostova S. , Kowalski K.

nr 4

353-361

We report measurements of the cross sections σ_{l-mix} for angular momentum mixing of the K(n^{2}F)(n=6, 7, 8) states with the K(n,l > 3) states, induced in thermal collisions with parent ground state K(4^{2}S) atoms. The experiment was performed in a cell heated to ca. 450K. The n^{2}F states were excited in two steps: 4^{2}S → 4^{2}P → n^{2F} by using a diode laser for the first step (a dipole-transition) and a pulsed dye laser for the second step (a quadrupole-transition). The measured values σ_{l-mix} (6^{2}F)=3.6+-2.2, σ_{l-mix} (7^{2}F)=4.2+-2.6 and σ_{l-mix} (8^{2}F)=8.0+-4.6 (in units of 10^{-13}cm^{-1}) are close to the corresponding values of the geometrical cross sections.