Browsing by Subject "silumin"

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Charakterystyka siluminu AlSi7Mg po obróbce cieplnej
(Data obrony: 2020-01-24) Leśniak, Patryk
Wydział Inżynierii Metali i Informatyki Przemysłowej
Access status: Open Access ,
Deformacja plastyczna siluminów o silnie rozdrobnionych ziarnach
(Data obrony: 2007) Pastuszek, Rafał
Wydział Metali Nieżelaznych
Scientific literature focused on plastic deformation mechanism of ultrafinegrained and nanometric size materials, doesn't consider materials that can be characterized as a hybrid structure materials (structure composed of several size fractions of components). That lack of sufficient knowledge about deformation process of hybrid materials causes difficulties in conscious, tailored utilization of that kind of materials in everyday engineering practice. Subject of PhD desideration was mechanism of plastic deformation of hybrid structure material $AlSi_{26}Ni_{8}$ produced via plastic consolidation of rapidly solidified metal powders. In order to analyze that phenomenon broad range of mechanical test in various temperatures and velocities of deformation were performed together with analysis of deformation topography picture using reference markers via SEM and metallographic observations. Results of the experiments were combined with TEM observations and extensive literature investigations. As a final effect, unconventional mechanism of plastic deformation was proposed and described for analyzed materials.
Access status: Open Access ,
Influence of time on modification effect of silumin AlSi11 with strontium and boron
(Wydawnictwa AGH, 2017) Romankiewicz, Remigiusz; Romankiewicz, Ferdynand
Studies on the effect of time on the modification of AlSi11 silumin with variable strontium micro additives in the form of an AlSr10 master alloy and boron in an AlB4 master alloy were investigated. The results showed that the strontium micro additive resulted in a satisfactory improvement in the α(Al) + β(Si) eutectic and an increase in tensile strength $(R_{m})$ and unit elongation $(A_{5})$, this is also the case two hours after adding the modifier. The simultaneous modification of silumin with AlB4 and AlSr10 causes a strong fragmentation of the alloy grains and significant improvement in $(R_{m})$ and $(A_{5})$ (also two hours after adding the modifiers).
Access status: Open Access ,
The study of the tensile strength of AlSi21CuNiMg silumin in the final stage of solidification and the initial stage of cooling
(AGH University of Science and Technology Press, 2019) Romankiewicz, Remigiusz
The paper presents the results of tensile strength tests of AlSi21CuNiMg silumin made on a test stand. Silumin was under examination in an unmodified state and after modification with AlCu19P1.4 master alloy in quantity of 0.2% in relation to the mass of the alloy. Using a scanning microscope, the surface fractures obtained from tensile tests were tested. The structure and profiles of fractures were examined using an optical microscope. Modification of the tested silumin resulted in a favorable fragmentation and regular distribution of the crystals of the primary silicon in the alloy structure, which led to an almost twofold increase in the strength of the silumin samples at the final solidification stage from 3.5 to 6.6 MPa. As a result of these changes, the resistance of silumin to hot cracks should increase, which is of great importance when casting hypereutectic silumin in a metal mould that strongly inhibits the shrinkage of the castings.
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Wpływ obróbki cieplnej na mikrostrukturę i własności siluminu AlSi7Mg
(Data obrony: 2020-12-11) Brak, Mateusz
Wydział Inżynierii Metali i Informatyki Przemysłowej
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Wpływ rodzaju i zużycia modyfikatora na trwałość efektu modyfikacji oraz właściwości mechaniczne stopu AlSiMg0,3
(Data obrony: 2015-09-29) Błaszczak, Adrian
Wydział Odlewnictwa
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Wykorzystanie technik modelowania 3D w procesie wykonywania odlewów ze stopów aluminium
(Data obrony: 2021-01-28) Żak, Kamil
Wydział Odlewnictwa