期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 29, 期 3, 页码 1528-1534出版社
SPRINGER
DOI: 10.1007/s11665-020-04605-3
关键词
additive manufacturing; high-temperature annealing; Inconel 625; laser powder bed fusion; microstructure
资金
- National Science Centre, Poland [2017/27/B/ST8/02244]
The microstructure of the laser powder bed additively manufactured Inconel 625 in post-build stress-relief annealed condition and subsequently annealed at a temperature of 600 degrees C for 5, 100 and 500 h was investigated by means of light microscopy as well as scanning and transmission electron microscopy. Stress-relieved Inconel 625 exhibited fine cellular-dendritic microstructure characterized by the high dislocation density. Selected area electron diffraction studies allowed to demonstrate that already after 5 h of annealing at a temperature of 600 degrees C, precipitation of the gamma '' phase in the form of coherent nanoparticles occurred. With the prolongation of the duration of annealing at a temperature of 600 degrees C from 5 to 500 h, the gradual dissolution of intercellular areas and decrease in the dislocation density were accompanied by enhanced precipitation of the gamma '' phase nanoparticles.
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