The effect of feedstock powder on mechanical and fatigue properties of cold sprayed pure metals
Vliv granulometrie prášku na mechanické a únavové vlastnosti kineticky deponovaných čistých kovů
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České vysoké učení technické v Praze
Czech Technical University in Prague
Czech Technical University in Prague
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Metoda cold spray (CS) se v posledních letech stala inovativní technologií aditivní výroby (CSAM). Má mnoho výhod, které jí činí vhodnou pro aplikaci v letectví i opravách. Mnohé vlastnosti takto vyrobených materiálů ale nejsou dostatečně prozkoumány. Mezi ty patří i chování těchto nástřiků při přítomnosti trhlin. S pomocí experimentálního zařízení vyvíjeného na KMAT FJFI byly zkoumány mechanické a lomové vlastnosti CSAM titanu ze tří velikostních frakcí prášku. Pro hlubší pochopení proběhla i metalografická a fraktografická analýza. Práce vznikla ve spolupráci s Helmut-Schmidt Universität v Hamburku. Výsledky ukazují rozdíly v pevnosti i dalších vlastnostech takto vyrobených materiálů. Bylo zjištěno, že u titanu je oproti jiným materiálům důležité se zabývat anizotropií lomových vlastností.
The cold spray (CS) method has become an innovative additive manufacturing (CSAM) technology in recent years. It has many advantages that make it suitable for aerospace and repair applications. However, many of the properties of CSAM materials have not been sufficiently investigated. These include the behavior of these coatings in the presence of cracks. With the help of an experimental facility under development at the department of materials of FNSPE, the mechanical and fracture properties of CSAM titanium made from three powder size fractions were investigated. Metallographic and fractographic analyses were also carried out for a deeper understanding. The work was carried out in collaboration with the Helmut-Schmidt University in Hamburg. The results show differences in the strength and other properties of the titanium materials produced in this way. Further it was found that for titanium, compared to other materials, it is important to address the anisotropy of the fracture properties.
The cold spray (CS) method has become an innovative additive manufacturing (CSAM) technology in recent years. It has many advantages that make it suitable for aerospace and repair applications. However, many of the properties of CSAM materials have not been sufficiently investigated. These include the behavior of these coatings in the presence of cracks. With the help of an experimental facility under development at the department of materials of FNSPE, the mechanical and fracture properties of CSAM titanium made from three powder size fractions were investigated. Metallographic and fractographic analyses were also carried out for a deeper understanding. The work was carried out in collaboration with the Helmut-Schmidt University in Hamburg. The results show differences in the strength and other properties of the titanium materials produced in this way. Further it was found that for titanium, compared to other materials, it is important to address the anisotropy of the fracture properties.