- Tytuł:
- Microstructural Analysis of Asymmetric Dilution by Rotating Direct Metal Deposition
- Autorzy:
-
Choi, Byungjoo
Lee, Gwang-Jae
Yeom, Hyun-Ho
Lee, Moon-Gu
Jeon, Yongho - Powiązania:
- https://bibliotekanauki.pl/articles/356931.pdf
- Data publikacji:
- 2019
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
rotating direct metal deposition
asymmetric dilution
cross-sectional analysis
microstructure
metallurgical composition - Opis:
- In this study, cross-section analysis was performed on a novel rotating direct-metal deposition method capable of preliminary surface treatment and damage repair of cylindrical inner walls. The cross-sectional shape, microstructure, and metallurgical composition were analyzed to verify feasibility. No defects such as porosity or cracks were found in the cross section, but asymmetric dilution was observed because of the non-coaxial powder nozzle. Microstructural coarsening was confirmed over a higher dilution area by high-magnification optical microscope images. As the dilution ratio was increased, hard carbides in the dendrite were bulkdiffused into inter-dendrite spaces, and the toughness was lowered by Fe penetration into the deposit. Therefore, the increased laser heat input can be modulated to the typical dilution by decreasing the laser scanning velocity.
- Źródło:
-
Archives of Metallurgy and Materials; 2019, 64, 2; 535-538
1733-3490 - Pojawia się w:
- Archives of Metallurgy and Materials
- Dostawca treści:
- Biblioteka Nauki
Artykuł