期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.11.110
关键词
Laser melting deposition; High entropy alloys; Microstructures; Tensile test
类别
资金
- National Natural Science Foundation of China [51601176, 51401189]
- Science and Technology Plan Project of Sichuan [2018G20146]
- Special Fund Project of Panzhihua [2017CY-G-21]
In this paper, a laser melting deposition (LMD) technique has been applied to fabricate CrMnFeCoNi high entropy alloys (HEAs). The microstructures and tensile properties of CrMnFeCoNi HEAs prepared under different laser power and scanning strategies have been investigated. It has been observed that the laser power and scanning strategy have significant effects on the columnar to equiaxed transitions (CET) of the microstructure of LMD CrMnFeCoNi HEAs because of their effects on heat flux direction and the temperature gradient. Due to small molten size and rapid cooling rate in LMD process which results in a significant solute-trapping effect and thus avoids component segregation, the elements distribution of LMD samples are more homogeneous than as-cast samples. Besides, tensile properties of the LMD samples can be adjusted by changing laser power and scanning strategy, which be corresponding to the changes of microstructure.
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