Partner: Jarosław Mizera

Warsaw University of Technology (PL)

Recent publications
1.Chmielewski M., Nosewicz S., Jakubowska D., Lewandowska M., Mizera J., Rojek J., Bazarnik P., The influence of sintering time on the microstructural properties of chromium-rhenium matrix composites, International Journal of Refractory Metals and Hard Materials, ISSN: 0263-4368, DOI: 10.1016/j.ijrmhm.2016.05.017, Vol.59, pp.78-86, 2016
Abstract:

This paper comprises the results of studies of the changes in the structure of Cr-Re-Al2O3 metal matrix depending on heat treatment time in sintering temperature. The density of material with the following composition: 95%(75%Cr-25%Al2O3)+5%Re was increased using the technique of sintering under pressure (30MPa) at the temperature of 1450°C. As a result, materials characterized by a high relative density (< 97% of theoretical density) were obtained. Next, they were subjected to structural tests including scanning and transmission electron microscopy as well as X-ray diffraction. Changes in the phase composition, grains size and parameters of crystallographic structure depending on heat treatment time were analysed. It was found that during sintering rhenium is dissolved in the chromium matrix and Cr-Re solid solution is formed. When sintering time is extended to 120 min, the matrix of the composite becomes completely homogenous, which results in an increased strength of the composite.

Keywords:

Metal matrix composites, Rhenium, Hot pressing, Microstructure analysis, XRD

Affiliations:
Chmielewski M.-Institute of Electronic Materials Technology (PL)
Nosewicz S.-IPPT PAN
Jakubowska D.-other affiliation
Lewandowska M.-other affiliation
Mizera J.-Warsaw University of Technology (PL)
Rojek J.-IPPT PAN
Bazarnik P.-Warsaw University of Technology (PL)
2.Pawełek A., Piątkowski A., Kuśnierz J., Bogucka J., Jasieński Z., Ranachowski Z., Ranachowski P., Mizera J., Kúdela S., Kúdela Jr S., Acoustic emission in compressed Mg - Li and Al. alloys processed by ECAP, HPT and ARB methods, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.32, No.4, pp.88-94, 2007

Conference papers
1.Barglik J., Ducki K., Kukla D., Mizera J., Mrówka-Nowotnik G., Sieniawski J., Smalcerz A., Comparison of Single and Consecutive Dual Frequency Induction Surface Hardening of Gear Wheels, VIII International Scientific Colloquium Modelling for Materials Processing, 2017-09-21/09-22, Riga (LV), DOI: 10.22364/mmp2017.27, pp.185-190, 2017
Abstract:

Mathematical modeling of single and consecutive dual - frequency induction surface hardening systems are presented and compared. The both models are solved by the 3D FEMbased professional software supported by a number of own numerical procedures. The methodology is illustrated with some examples of surface induction hardening of a gear wheel made of steel 41Cr4. The computations are in a good accordance with experiments provided on the laboratory stand

Affiliations:
Barglik J.-Silesian University of Technology (PL)
Ducki K.-Silesian University of Technology (PL)
Kukla D.-other affiliation
Mizera J.-Warsaw University of Technology (PL)
Mrówka-Nowotnik G.-Rzeszów Technical University (PL)
Sieniawski J.-Rzeszów Technical University (PL)
Smalcerz A.-Silesian University of Technology (PL)