Directed energy deposition of bulk Nb-Ta-Ti-Zr refractory complex concentrated alloy

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F23%3AN0000036" target="_blank" >RIV/26316919:_____/23:N0000036 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/23:10474187
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0167577X23001659" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0167577X23001659</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matlet.2023.133980" target="_blank" >10.1016/j.matlet.2023.133980</a>

Result language
angličtina
Original language name
Directed energy deposition of bulk Nb-Ta-Ti-Zr refractory complex concentrated alloy
Original language description
Bulk Nb-Ta-Ti-Zr refractory complex concentrated alloy (RCCA) was prepared by additive manufacturing method of directed energy deposition (DED) from an equiatomic mixture of elemental powders. Using elemental powders instead of pre-alloyed powder is beneficial in terms of costs and variability of chemical composition. However, it is more demanding for optimization of deposition parameters. Variation of scanning velocity was used to study the effect of different heat inputs. It was found that a decreasing scanning velocity effectively decreases the number of undissolved Nb/Ta particles present in the microstructure. Moreover, employing of the platform preheating to 500 degrees C during deposition resulted in the best microstructure homogeneity among the studied asdeposited samples. Finally, homogenization annealing 1400 degrees C/24 h was performed. Despite the Thermo-Calc prediction of complete Ta particles dissolution, they remained still present in the material. Reasonable microstructure homogeneity of RCCA produced from elemental powders must be achieved already by optimization of deposition parameters while the homogenization annealing is not feasible for heterogeneities in the scale of powder particles size.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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