Agnieszka Chmielewska

Agnieszka Chmielewska
Warsaw University of Technology · Division of Materials Design

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12
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45
Citations

Publications

Publications (12)
Article
Purpose-The purpose of this paper is to investigate the effect of remelting each layer on the homogeneity of nickel-titanium (NiTi) parts fabricated from elemental nickel and titanium powders using laser powder bed fusion (LPBF). In addition, the influence of manufacturing parameters and different melting strategies, including multiple cycles of re...
Article
Purpose The purpose of this paper is to investigate the effect of remelting each layer on the homogeneity of nickel-titanium (NiTi) parts fabricated from elemental nickel and titanium powders using laser powder bed fusion (LPBF). In addition, the influence of manufacturing parameters and different melting strategies, including multiple cycles of re...
Article
Full-text available
The use of elemental metallic powders and in situ alloying in additive manufacturing (AM) is of industrial relevance as it offers the required flexibility to tailor the batch powder composition. This solution has been applied to the AM manufacturing of nickel-titanium (NiTi) shape memory alloy components. In this work, we show that laser powder bed...
Article
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In this work, NiTi alloy parts were fabricated using laser powder bed fusion (LBPF) from pre-alloyed NiTi powder and in situ alloyed pure Ni and Ti powders. Comparative research on the corrosive and biological properties of both studied materials was performed. Electrochemical corrosion tests were carried out in phosphate buffered saline at 37 °C,...
Article
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Additive Manufacturing of scaffolds with controlled porosity has demonstrated its value in many fields such as tissue regeneration and filtration applications. However, there is a scarcity of reports investigating the manufacturing of scaffolds with hollow fibers. Mainly, this was due to the lack of proper tools (extrusion nozzles) that enable the...
Article
Full-text available
NiTi alloys are widely used in different industrial and medical applications. Due to the inherent difficulty in the machining of these alloys, the use of Additive Manufacturing (AM) methods has become a popular method for their production. When working with NiTi alloys, there is a requirement on the precise control of their chemical composition, as...
Article
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Dental implants are, nowadays, established surgical devices for the restoration of lost teeth. Considered as an alternative for traditional prosthetic appliances, dental implants surpass them in reliability and patient feedback. Local drug delivery around the implants promotes osseointegration and reduces peri-implantitis. However, there are curren...
Article
Nickel–titanium (NiTi) alloys have shown promise for a variety of biomedical applications because of their unique properties of shape memory, superelasticity, and low modulus of elasticity (Young's modulus). Nevertheless, NiTi bulk components cannot be easily machined (e.g., CNC, rolling, grinding, casting, or press molding) due to their thermomech...
Article
Biocompatibility of a novel heat-treated and ceramic-coated magnesium alloy (Mg–1.2Zn–0.5Ca–0.5Mn) for resorbable skeletal fixation devices - Agnieszka Chmielewska, Taylor MacDonald, Hamdy Ibrahim, Tim McManus, Jan Lammel Lindemann, Patrick Smith, Lihan Rong, Alan Luo, Rigoberto Advincula, Wojciech Swieszkowski, Mohammad Elahinia, David Dean
Article
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Diatom frustules, with their diverse three-dimensional regular silica structures and nano- to micrometer dimensions, represent perfect model systems for biomimetic fabrication of materials and devices. The structure of a frustule of the diatom Didymosphenia geminata was nondestructively visualized using nano X-ray computed tomography (XCT) and tran...
Article
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Druk 3D jako metoda umożliwiająca wytwarzanie obiektów o skomplikowanej geometrii oraz dużej dokładności odwzorowania kształtu i wymiarów podbija wiele gałęzi przemysłu. Dzieje się tak dzięki coraz bardziej wydajnym urządzeniom do druku 3D oraz rosnącemu spektrum materiałów polimerowych, metalicznych i kompozytowych możliwych do zastosowania w tej...

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