@ARTICLE{Choi_Byungjoo_Microstructural_2019, author={Choi, Byungjoo and Lee, Gwang-Jae and Yeom, Hyun-Ho and Lee, Moon-Gu and Jeon, Yongho}, volume={vol. 64}, number={No 2}, journal={Archives of Metallurgy and Materials}, pages={535-538}, howpublished={online}, year={2019}, publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences}, publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences}, 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 bulk-diffused 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.}, type={Artykuły / Articles}, title={Microstructural Analysis of Asymmetric Dilution by Rotating Direct Metal Deposition}, URL={http://journals.pan.pl/Content/111313/PDF/AMM-2019-2-16-Jeon.pdf}, doi={10.24425/amm.2019.127573}, keywords={Rotating direct metal deposition, Asymmetric dilution, Cross-sectional analysis, microstructure, Metallurgical composition}, }