Małgorzata Karolus

Effect of heat treatments on fatigue behavior and fracture of Inconel 625 additively manufactured by Laser Powder Bed Fusion

Andrea Avanzini, Wojciech Macek, Davide Battini, B. Tomiczek et autres

ABSTRACT This investigation examined the impact of Heat Treatments (HT) on the fatigue and fracture characteristics of additively manufactured Inconel 625. Following the fabrication of net-shaped specimens by the Laser Powder Bed Fusion (L-PBF) technique, the material underwent four distinct heat treatments: …

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Thermally Initiated Structural Transformations in the Temperature Range (624–643) ± 1 K for Amorphous Metal Alloy Al87Y4Gd1Ni8 and Influence on Mechanical Properties

Khrystyna Khrushchyk, Paweł Świec, Yurii Kulyk, Krzysztof Aniołek et autres

Amorphous metal alloys (AMAs) are metastable materials that are characterized by good mechanical properties and corrosion properties. It is known that with certain thermal modifications, these properties improve or lose their value. The purpose of this research work is to investigate the …

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Short-Term Annealing Effect on Hydrogen Evolution Activity of Amorphous Al87Y4Gd1Ni4Fe4

Khrystyna Khrushchyk, Julian Kubisztal, Krzysztof Aniołek, Paweł Świec et autres

This work investigates the structural evolution and electrocatalytic activity of the amorphous metal alloy Al87Y4Gd1Ni4Fe4 during short-term annealing and its effect on the kinetics of the hydrogen evolution reaction (HER) in 1 M KOH. It is shown that a 5 min heat …

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The Effect of Short-Term Annealing of the Amorphous Metal Alloy Al87Y4Gd1Ni8 on Surface Morphology and Electrochemical Properties

Khrystyna Khrushchyk, Julian Kubisztal, Katarzyna Balin, Krzysztof Aniołek et autres

Amorphous metal alloys (AMAs) are characterized by good mechanical and electrochemical properties. However, due to crystallization processes occurring at higher temperatures (Ta ˃ 600 K), these properties may deteriorate. The aim of this work was to investigate the effects of short-term annealing …

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CORROSION RESISTANCE OF THERMOMODIFIED AMORPHOUS ALLOY Al87Y4Gd1Ni8 IN THE TEMPERATURE RANGE 624-643 К

Khrystyna Khrushchyk, Marta CHAVA, Veronika PIHEL, Julian Kubisztal et autres

In this work, the changes in the chemical composition of the surface of the amorphous metal alloy Al87Y4Gd1Ni8 as a result of isothermal annealing for two minutes in the air atmosphere at temperatures T1 = 624±2, T2 = 633±2, T3 = 643±2 …

Properties of Mg62Zn30Ca4Au1Er3 alloy prepared by mechanical alloying

Julia Popis, Oliwia Starczewska, M. Kremzer, Klaudiusz Gołombek et autres

There has been a growing interest in modern metal alloys with exceptional mechanical and functional properties that can be used in many advanced technologies, including biomedicine, the aerospace industry, and electronics. One of the research directions is the development of magnesium-based alloys, …

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Characteristics of Mg-Zn-Ca-Pr Alloy Synthesized by Mechanical Alloying

S. Lesz, Małgorzata Karolus, Bartłomiej Hrapkowicz, Tomasz Gaweł et autres

Magnesium-based materials are an interesting solution in terms of medical applications. Alloys that are hard to obtain via standard means may be manufactured via mechanical alloying (MA), which allows the production of materials with complex a chemical composition and non-equilibrium structures. This …

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Structural and thermal investigations of the ternary Mg–Zn–Ca system

Julia Popis, Oliwia Starczewska, M. Kremzer, Klaudiusz Gołombek et autres

Abstract Magnesium alloys have become suitable candidates for potential biomedical materials due to their excellent mechanical properties, biocompatibility, and biodegradability. Among different Mg alloys, the Mg–Zn–Ca system is the most popular degradable implant material. The aim of this work is the structure …

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Thermal Stability and Non-Linear Optical and Dielectric Properties of Lead-Free K0.5Bi0.5TiO3 Ceramics

Piotr Czaja, Elżbieta Szostak, Joanna Hetmańczyk, Piotr Zachariasz et autres

Lead-free K0.5Bi0.5TiO3 (KBT) ceramics with high density (~5.36 g/cm3, 90% of X-ray density) and compositional purity (up to 90%) were synthesized using a solid-state reaction method. Strongly condensed KBT ceramics revealed homogenous local microstructures. TG/DSC (Thermogravimetry-differential scanning calorimetry) techniques characterized the thermal …

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Mechanical Properties of Nano-Crystalline Glass-Carbomer Cements Used in Dentistry

Małgorzata Karolus, Adrian Barylski, Magdalena Fryc, Damian Strzelec

The main aim of this study was to assess the impact of the environment on the mechanical and tribological properties of glass-carbomer cements used in dentistry. The properties of the Glass Cements Polyalkene (GCP) Glass Fill material, belonging to glass-polyalkene cements, were …

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Mechanical properties of amorphous metal alloy Al87(Ni,Fe)8(REM)5 system as a result of short-term annealing

Kh. Khrushchyk, Adrian Barylski, Krzysztof Aniołek, Małgorzata Karolus et autres

The phase transition temperatures for amorphous metals based on aluminum Al87(Ni,Fe)8(REM)5 system were determined by differential scanning calorimetry (DSC). The mechanisms of formation and growth of nanocrystals in an amorphous matrix were predicted using kinetic models (Matusita model). It was found that …

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Effect of Short Heat Treatment of Amorphous Metal Alloy on Decolorization Dye Mendola Blue

Khrystyna Khrushchyk, Katarzyna Balin, Vasyl Kordan, Sylwia Golba et autres

It was established that the change in the structure of the amorphous metal alloy (AMA) as a result of heat treatment of the amorphous metal alloy Al 87 Gd 5 Ni 4 Fe 4 at T = 645±1 K significantly affects the …

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