Original title:
Studium preciptačních procesů v systému Mg-Y a Mg-Y-Nd
Translated title:
Study of precipitation effects in Mg-Y and Mg-Y-Nd systems
Authors:
Heteš, Michal ; Čížek, Jakub (advisor) ; Procházka, Ivan (referee) Document type: Bachelor's theses
Year:
2023
Language:
slo Abstract:
[eng][cze] The aim of this bachelor's thesis was to investigate the precipitation processes in the binary system Mg-Y and the ternary alloy Mg-Y-Nd using positron annihilation spect- roscopy and hardness testing, where we measured 2 samples with 3% and 6% by weight representation of Yttrium impurity atoms and 3 sample with 4% by weight representation of yttrium atoms and 3% by weight representation of neodymium atoms. The develop- ment of the hardness of the alloys was measured by the Vickers method of hardness measurement. Together with the hardness measurement, the characterization of crystal lattice disorders of the cloudy alloy samples was carried out using positron annihilation spectroscopy. It was measured that at higher temperatures hardening of the studied sys- tems occurs. Hardening was caused by the formation of GP zone precipitates and the β′ phase by Y, Nd and Mg atoms. 1Cieľom tejto bakalárskej práce bolo preskúmať precipitačné procesy v binárnom sys- téme Mg-Y a terciárnej zliatine Mg-Y-Nd pomocou pozitrónovej anihilačnej spektroskopie a testovaniu tvrdosti, kde sme merali 2 vzorky s 3% a 6% hmotnostným zastúpením ató- mov prímesi Y a 3 vzorku s 4% hmotnostným zastúpením atómov Y a 3% hmotnostným zastúpením atómov neodýmu. Vývoj tvrdosti zliatin bol meraný Vickersovou metódou merania tvrdosti. Spolu s meraním tvrdosti bola prevedená charakterizácia poruch kryš- talických mriežok vzoriek zakalených zliatin pomocou pozitrónovej anihilačnej spektro- skopie. Bolo namerané, že pri vyšších teplotách dochádza k vytvrdzovaniu skúmaných systémov. Vytvrdenie bolo spôsobené tvorbou precipitátov GP zón a β′ fázy atómami Y, Nd a Mg.GP zone precipitates and the β′ phase by Y, Nd and Mg atoms. 1
Keywords:
magnesium alloys|precipitation|positron annihilation; hořčíkové slitiny|precipitace|anihilace pozitronů
Institution: Charles University Faculties (theses)
(web)
Document availability information: Available in the Charles University Digital Repository. Original record: http://hdl.handle.net/20.500.11956/182492