Optimization of Ta Content of a Third Generation Ni3Al Base Single Crystal Superalloy

Song Ming Han; Wei Li; Yue Ma; Xin Bao Zhao; Shu Suo Li; Sheng Kai Gong

doi:10.4028/www.scientific.net/MSF.816.304

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HomeMaterials Science ForumMaterials Science Forum Vol. 816Optimization of Ta Content of a Third Generation...

Optimization of Ta Content of a Third Generation Ni₃Al Base Single Crystal Superalloy

Abstract:

In order to optimize the Ta content of a newly developed 3rd generation Ni₃Al-based single crystal superalloy, a series of alloys with the varying of Ta content of 3.0, 4.2, 4.5, 6.0wt. % were prepared. The experimental results showed that with the addition of Ta, the size and volume fraction of bulky γ' phase significantly increased while the primary dendrite arm spacing decreased. Meanwhile, the difficulty of solution treatment significantly increased with increasing Ta content. And the thermodynamic calculation results showed that the volume fractions of γ' phase in this series of alloys were significantly higher than those of typical Ni based single crystal superalloys, indicating that the 3rd generation Ni₃Al based single crystal superalloys can serve in the temperature of 1150oC to 1200oC.

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Periodical:

Materials Science Forum (Volume 816)

Pages:

304-309

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.816.304

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Online since:

April 2015

Authors:

Song Ming Han, Wei Li, Yue Ma, Xin Bao Zhao, Shu Suo Li, Sheng Kai Gong

Keywords:

Microstructure, Ni₃Al Based Single Crystal Superalloy, Ta, γ' Phase

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