Original title: Biologicky odbouratelné materiály na bázi hořčíku pro stenty a kostní implantáty
Translated title: Biodegradable Mg-based materials for stents and bone implants
Authors: Zemková, Mária ; Král, Robert (advisor) ; Stráská, Jitka (referee)
Document type: Bachelor's theses
Year: 2015
Language: slo
Abstract: [eng] [cze]
The bachelor thesis is focused on the effect of mechanical processing rotary swaging (RS), specifically on the microstructure, mechanical properties and corrosion properties. The investigation was performed on the magnesium alloy AE42 with a different number of RS passes, which can be useful for medical applications. RS is more efficient and cheaper alternative to different material processing methods producing fine-grained struc- ture. Fine-grain structure with grain boundaries with high angle misorientation was achieved by this process. Microstructure was inhomogeneous - the grain size decreased from the surface to the center. An improvement of mechanical properties with the increase in the number of swaging steps was observed. Processing also led to a decrease in corrosion resistance in this alloy. Microstructure development was investigated by electron microscopy scanning. Development of mechanical properties was characterized by compression deformation tests and microhardness measurements. Linear pola- rization method was used for the interpretation of corrosion resistance. 1 Bakalárska práca je zameraná na štúdium vplyvu mechanického spracovania, konkrétne rotačným kovaním (RS), na mikroštruktúru, mechanické vlastnosti a korózne vlastnosti. Tento vplyv bol skúmaný na horčíkovej zliatine AE42 s rôznym počtom prechodov RS, ktorá by mohla mat' potenciálne využitie v medicíne. RS je výkonnejšou a lacnejšou náhradou iných techník dosahujúcich jemnozrnnú štruktúru. S touto metódou sa po- darilo dosiahnút' takúto štruktúru s hranicami z'rn s vysokou uhlovou misorientáciou. Mikroštruktúra ale mala nehomogénny charakter, ktorý sa menil v radiálnom smere kovania. Bol pozorovaný nárast pevnosti s ratúcim počtom krokov RS, avšak zlepšenie koróznej odolnosti študovanej zliatiny nebolo dosiahnuté. Vývoj mikroštruktúry bol pozorovaný skenovacou elektrónovou mikroskopiou. Mechanické vlastnosti boli cha- rakterizované tlakovými deformačnými skúškami a meraním mikrotvrdosti. Na stanovenie koróznej odolnosti bola použitá lineárna polarizačná metóda. 1
Keywords: biomaterials; implants; magnesium; biomateriály; hořčík; implantáty

Institution: Charles University Faculties (theses) (web)
Document availability information: Available in the Charles University Digital Repository.
Original record: http://hdl.handle.net/20.500.11956/61885

Permalink: http://www.nusl.cz/ntk/nusl-473935


The record appears in these collections:
Universities and colleges > Public universities > Charles University > Charles University Faculties (theses)
Academic theses (ETDs) > Bachelor's theses