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1 Journal of Achievements in Materials and Manufacturing Engineering
1 Prace Naukowe Instytutu Technologii Nieorganicznej i Nawozów Mineralnych Politechniki Wrocławskiej. Konferencje

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Influence of pulse laser irradiation on structure and mechanical properties of amorphous Fe73.1Nb3Cu1.0Si15.5B7.4 alloy

Mudry S.I., Nykyruy Yu.S., Kulyk Yu.O., Stotsko Z. A.

Journal of Achievements in Materials and Manufacturing Engineering

2013

Vol. 61, nr 1

7--11

Purpose: The aim of this work was to study structure changes in Fe-based amorphous ribbon under laser radiation, determine it dependence from laser treatment parameters and establish the correlation between structure and microhardness. Design/methodology/approach: Amorphous ribbons of Fe73.1Nb3Cu1.0Si15.5B7.4 alloy, obtained by rapid cooling from the melt, has been treated by pulsed laser radiation with wavelength λ = 1.06 μm and pulse duration τ = 130 ns. Structure transformation has been studied by means of X-ray diffraction method, which allowed us to determine the phase composition, volume fraction and grain size of crystalline phases has been determined. Findings: It has been shown, that laser treatment method allows forming an amorphous-nanocrystalline composite. It was found that microhardness of ribbon increases after irradiation and linearly depends on percent of crystalline phase. Practical implications: Laser treatment can be used as an substitute of isothermal heat treatment to produce amorphous-nanocrystalline materials with improved properties. Originality/value: The originality of this work is based on applying of pulse laser irradiation for modifying structure of amorphous Fe73.1Nb3Cu1.0Si15.5B7.4 alloy.

Badania rentgenowskie osadów korozyjnych na rurkach mosiężnych

Kucharska B., Nitkiewicz Z.

Prace Naukowe Instytutu Technologii Nieorganicznej i Nawozów Mineralnych Politechniki Wrocławskiej. Konferencje

1998

Vol. 46, nr 27

248-253

W pracy przedstawiono badania rentgenowskie składu fazowego osadów korozyjnych na mosiężnych rurkach skraplaczy. Rurki użyte do badań pracowały w skraplaczach w elektrowniach. Badania przeprowadzono na dyfraktometrze rentgenowskim z użyciem lamp o anodach Cu i Co. Dokonano porównania dyfraktogramów z osadów uzyskanych przy użyciu tych lamp. Stwierdzono, że osadem towarzyszącym wżerom korozyjnym i performacjom są siarczany miedzi.

The X-ray of phase composition of corrosive deposit on brass condenser pipes were presented. Pipes used to study were exploited in condensers in power stations. The X-ray diffractometer with Cu and C lamps was applied. Diffraction patterns of deposits made with the application of these lamps were compared. It was found, that in the place of deep pits and perforations the copper sulfates were occurred.