期刊
MATERIALS CHARACTERIZATION
卷 178, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2021.111289
关键词
Additive manufacturing (AM); Selective laser melting (SLM); Electron backscatter diffraction (EBSD); Macro-micro texture; TiC-based cermet
类别
资金
- Shahid Chamran University of Ahvaz [GN26247]
This study investigated the effects of different selective laser melting scan speeds on the microstructure and texture evolution of in situ TiC-NiCr cermet. The in situ formation of TiC via exothermic reaction resulted in different directions of temperature gradient in the melt pool, leading to nucleation and growth in various directions. Alpha-fiber texture could be observed in the orientation distribution function of the manufactured specimens.
The effects of different selective laser melting (SLM) scan speeds (150 mm.sxe213; 1, 95 mm.sxe213; 1, 60 mm.sxe213; 1, 55 mm.sxe213; 1, and 50 mm.sxe213; 1) on the microstructure and texture evolution of in situ TiC-NiCr cermet were investigated in the present study. The rotating scan strategy of 60 degrees rotation (Rot-scan) was used to print the samples. Microstructural evolutions were investigated using scanning electron microscopy (SEM). Electron backscatter diffraction (EBSD) and X-ray diffraction analyses were used to identify the micro- and macro-crystallographic preferred orientation (texture). According to the results, the in situ formation of TiC via exothermic reaction resulted in different directions of temperature gradient in the melt pool. Consequently, nucleation and growth occurred in various directions. However, alpha-fiber texture could be observed in the orientation distribution function (ODF) of the manufactured specimens.
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