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1

Comparison of structure and mechanical properties of implants produced by injection method

Łukaszewicz A.

Archives of Materials Science and Engineering

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2017

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Vol. 86, nr 1

32--40

EN

Purpose: The paper presents the possibility to improve the mechanical properties of dental implants produced of Ti6Al4V titanium alloy and possibility to use a new method to production those implants. The aim of the study was a comparison of properties of the feed materials, produced and commercial implants made of Ti6Al4V. Design/methodology/approach: The innovative injection methods was used. The comparison of microstructures and microhardness were carried out. Findings: It was shown that the use of new injection methods in the dental implant producing process effects on their structure and thus their mechanical properties. It has been observed that implants manufactured in comparison to commercial implants have a varied structure which is changing from the surface of the implant to its core. These changes are associated with a producing method that ensures very rapid heat dissipation from the surface of the manufacturing element. Research limitations/implications: During the production of the implants, problems have been encountered with keeping the alloy clean may occur. Practical implications: Injection method can be used as a method for commercial production of dental implants. Originality/value: The paper presents the results of microstructure and mechanical properties of dental implants – produced by new injection method.

2

An attempt to improve the properties of Ti15V3Al3Cr3Sn titanium alloy by applying an innovative method of shaping-injection with rapid cooling

Klimas J., Łukaszewicz A., Szota M.

Archives of Materials Science and Engineering

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2015

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Vol. 76, nr 2

122--128

EN

Purpose: The study attempts to improve the properties of Ti15V3Al3Cr3Sn titanium alloy by applying an innovative method of shaping, injection with rapid cooling. The comparison of structures and properties of Ti15V3Al3Cr3Sn titanium alloy produced by two methods: conventional one by rolling and by injection with rapid cooling has been presented. Design/methodology/approach: Ti15V3Al3Cr3Sn titanium alloy produced by two methods: traditionally used rolling to achieve products in the form of sheets and unconventionally used injection of molten alloy to mold under pressure with rapid cooling. To achieve the objective the following studies have been carried out: observation of the microstructure by the optical and scanning electron microscope, EDS to verify the chemical composition, roughness measurement to examine surface layer geometry and microhardness tests. Findings: : Observations of microstructures have shown that the Ti15V3Al3Cr3Sn titanium alloy produced by overpressure with rapid cooling has the ability to create fine-grained structure in a top layer with a more ductile core. Such a combination of the structure has enabled to obtain better mechanical properties than the samples produced by the conventional method. Hard, durable and smooth surface layer with a ductile core provides the opportunity to use that material in many fields of materials engineering. Originality/value: The paper presents studies of titanium alloy shaped by the unconventional method of injection to achieve much better properties than for alloys obtained by rolling.

3

Comparison of mechanical properties of Ti-6Al-4V titanium alloy produced by the conventional method and the injection

Smolarczyk P., Łukaszewicz A., Szota M., Nabiałek M., Bukowska A.

Journal of Achievements in Materials and Manufacturing Engineering

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2013

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Vol. 61, nr 2

281--288

EN

Purpose: In these paper was were characterized mechanical properties of titanium alloy Ti-6Al-4V, which were produced by two methods - conventional casting and injection casting. Studies were presented by comparing of samples which were produced by these methods. Design/methodology/approach: Samples were produced by two methods – conventional and injection casting. To achieve the objective were performer the following steps: the microstructure was carried out, the analysis of mechanical properties was done (microhardness), study of surface roughness was made, research of abrasion was made and phase composition by X-ray diffraction was made. After then then a comparison of these studies between these samples was made. Findings: The study of the microstructure was observed that the titanium alloy Ti-6Al-4V prepared by the conventional method, it has equiaxed and globular structure. In contrast, titanium alloy produced by the injection has strips structure, where phase α’ is on phase β border. Further studies have shown that a sample of titanium alloy Ti-6Al-4V produced by injection it has a much greater tribological resistance because it has a higher microhardness and much greater roughness than the sample of the same alloy produced by the conventional method. Originality/value: In this article conducted a comparative characteristics for the two production methods - conventional and injection - titanium alloy Ti-6Al-4V. The research indicated that much better mechanical properties are characterized alloys produced by injection.

4

Komputerowa symulacja warunków przerobu pyłów pochodzących z procesu przetopu złomu stali w piecach elektrycznych (EAFD) metodą iniekcji do strefy dysz pieca szybowego ISF.

Kapias P.

Rudy i Metale Nieżelazne

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2003

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R. 48, nr 7

315-319

PL

Przedstawiono relację pomiędzy najważniejszymi parametrami przerobu EAFD metodą iniekcji do strefy dysz pieca szybowego do jednoczesnego otrzymywania cynku i ołowiu (ISF). Relacje te ustalono traktując strefę topienia i redukcji ISF jako tak zwaną "czarną skrzynkę", dla której poszukiwano związków pomiędzy parametrami wejścia i wyjścia dla różnych sytuacji technologicznych. Dla takiego modelu możliwe było sformułowanie układu równań nieliniowych, z których pierwsze reprezentowało bilans masy, kolejne wyrażało pierwszą zasadę termodynamiki, wreszcie ostatnie warunek równowagi termodynamicznej na granicy pomiędzy strefą topienia i redukcji a strefą równowagi.

EN

Relations between main parameters of the electric arc furnace dust (EAFD) processing method by the injection to a nozzles zone of a shaft furnace (ISF) in order to obtain simultaneously zinc and lead are presented. To determine these relations, melting and reduction zones of the ISF furnace were assumed to be a " black box ", and dependencies between input and output parameters for different technological situations were analysed. Based on such model, a system of non-linear equations was formulated so that the first of them represented a mass balance, the next one reflected the first principle of thermodynamics, and the last one expressed condition of thermodynamic equilibrium on a boundary between melting and reduction zones and the equilibrium zone.