We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
MICROSTRUCTURAL ANALYSIS OF ASYMMETRIC DILUTION BY ROTATING DIRECT METAL DEPOSITION.
- Authors
BYUNGJOO CHOI; GWANG-JAE LEE; HYUN-HO YEOM; MOON-GU LEE; YONGHO JEON
- Abstract
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.
- Subjects
DILUTION; SURFACE preparation; OPTICAL microscopes; OPTICAL images; METALS
- Publication
Archives of Metallurgy & Materials, 2019, Vol 64, Issue 2, p535
- ISSN
1733-3490
- Publication type
Article
- DOI
10.24425/amm.2019.127573