期刊
MATERIALS
卷 11, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/ma11081288
关键词
nickel alloys; Hastelloy X alloy; additive manufacturing; microstructure; scanning electron microscopy (SEM); laser powder bed fusion (LPBF)
类别
资金
- McGill Engineering Doctoral Award (MEDA)
- Consejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico)
Crack-free Hastelloy X fabricated through laser powder bed fusion (LPBF) from powder with a standard chemical composition is reported. Electron backscatter diffraction (EBSD) analysis evidenced columnar grains parallel to the building direction. The typical LPBF columnar dendrite microstructure was found to be finer than reported elsewhere. Mo-enriched carbides (similar to 50 nm), presumed to play an important role in the cracking behavior of the alloy, were confirmed along interdendritic regions. Crack-free condition was maintained after heat treatment at 1177 degrees C for 1 h followed by water quenching, and the resulting microstructure was analyzed.
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