Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal

Shi-hua Ma; Hong-quan Hao; Dong Wang; Lang-hong Lou; Jian Zhang

doi:10.1007/s12613-019-1817-6

Volume 26 Issue 7

Jul. 2019

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文章导航 > 矿物冶金与材料学报（英文） > 2019 > 26(7): 901-907

Shi-hua Ma, Hong-quan Hao, Dong Wang, Lang-hong Lou, and Jian Zhang, Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 901-907. https://doi.org/10.1007/s12613-019-1817-6

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Shi-hua Ma, Hong-quan Hao, Dong Wang, Lang-hong Lou, and Jian Zhang, Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 901-907. https://doi.org/10.1007/s12613-019-1817-6

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研究论文

Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal

Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
National Natural Science Foundation of China, Beijing 100085, China

中文摘要

The effects of Ta on the solidification microstructure of the Re-containing hot corrosion resistant Ni-base single crystal were investigated. Results showed that Ta addition significantly modified the solidification behavior and further influenced the as-cast microstructure. Ta addition changed the solidification characteristic temperatures and decreased the segregation of refractory elements (Re and W) as well as increased the solidification temperature range from 39.0 to 61.8℃ as Ta addition increased from 2wt% to 8wt%. The integration of these two factors increased the primary dendrite arm spacing and changed the morphology and size of γ' precipitates. With increasing Ta addition from 2wt% to 8wt%, the size of γ' precipitates in the dendrite core increased substantially from 0.24 to 0.40 μm, whereas the γ' precipitates in the interdendritic region decreased slightly from 0.56 to 0.47 μm. This paper then discussed the mechanism of these "Ta effects".

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Research Article

Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal

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Abstract

Abstract

The effects of Ta on the solidification microstructure of the Re-containing hot corrosion resistant Ni-base single crystal were investigated. Results showed that Ta addition significantly modified the solidification behavior and further influenced the as-cast microstructure. Ta addition changed the solidification characteristic temperatures and decreased the segregation of refractory elements (Re and W) as well as increased the solidification temperature range from 39.0 to 61.8℃ as Ta addition increased from 2wt% to 8wt%. The integration of these two factors increased the primary dendrite arm spacing and changed the morphology and size of γ' precipitates. With increasing Ta addition from 2wt% to 8wt%, the size of γ' precipitates in the dendrite core increased substantially from 0.24 to 0.40 μm, whereas the γ' precipitates in the interdendritic region decreased slightly from 0.56 to 0.47 μm. This paper then discussed the mechanism of these "Ta effects".
- superalloys;
- tantalum;
- solidification behavior;
- microstructure

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Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal

中文摘要

Effects of Ta on the solidification behavior and microstructure of a rhenium-containing hot corrosion resistant single crystal

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