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Structural Basis of Interface Engineering

100%
Świątnicki W.
Acta Physica Polonica A
|
1996
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vol. 89
|
issue 2
235-249
EN
The paper analyses in a systematic manner these structural factors of interfaces in relation to their properties that constitute the background of "interface engineering". It is shown that the specific properties of interfaces are related to their structure. A brief description of recent structural models of interfaces is therefore presented. A new concept of interface microstructure composed of different kinds of interfacial defects is introduced and their role in determining the interface properties is emphasised. It is shown that interfaces control the processes taking place in the material under external solicitations or during the microstructure formation, mainly through their interaction with other crystal defects. Various examples illustrating the possibility of controlling and improving the material properties by appropriate changes of interface structures are presented in the case of metals, alloys, intermetallics and ceramics.
2
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The Effect of Stepped Austempering on Phase Composition and Mechanical Properties of Nanostructured X37CrMoV5-1 Steel

51%
Marciniak S., Skołek E., Świątnicki W.
Archives of Metallurgy and Materials
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2015
|
issue 1
3
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The Comparative Study of the Microstructure and Phase Composition of Nanoausferritic Ductile Iron Alloy Using SEM, TEM, Magnetometer, and X-Ray Diffraction Methods

51%
Skołek E., Giętka T., Świątnicki W., Myszka D.
Acta Physica Polonica A
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2017
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vol. 131
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issue 5
1319-1323
EN
In this paper the microstructure and phase composition of ausferritic ductile iron alloy were investigated by scanning electron microscopy, transmission electron microscopy and X-ray diffraction methods. In order to obtain the nanoausferritic microstructure in the alloy, the austempering heat treatment was performed at relatively low temperature. As a result, a specific kind of microstructure, containing nanocrystalline ausferrite and retained austenite blocks, was obtained in each heat-treated sample. The volume fractions of phases were determined using different methods: MicroMeter software for scanning electron micrographs, stereological analysis for transmission electron micrographs, quantitative analysis of the X-ray diffraction spectra and magnetometer measurements. All methods revealed a high amount of retained austenite which varied as a function of the austempering treatment parameters. It was shown that the quantitative phase composition measured by X-ray diffraction and magnetometer, in all samples investigated, differs significantly from the stereological measurements and image analysis performed through the MicroMeter software. The possible reasons of the observed differences were discussed.
4
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TEM & AFM - Complementary Techniques For Structural Characterization Of Nanobainitic Steel

45%
Dworecka J., Rożniatowski K., Jezierska E., Rębiś J., Świątnicki W.
Archives of Metallurgy and Materials
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2015
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issue 3
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