On the oxidation of the third-generation single-crystal superalloy CMSX-10

An observation was conducted on the microstructures of as-cast as well as solid solution treated the third generation single crystal superalloy DD9 using optical microscope and SEM. The effects of solid solution temperature and time on the eutectic fractions of γ/γ and size of γ of the alloy were investigated. The results showed that the microstructure of DD9 was uniform. W and Re segregated to the dendrite cores while Al, Ta and Nb were enriched in interdendritic regions during solidification. The eutectic fractions of γ/γ reduced with the solid solution temperature raising and the solid solution time prolonging. When solid solution temperature increased to 1340, the eutectic in the alloy was entirely dissolved. The size of γ in dendritic cores was consistent, however the size of γ in interdendritic regions was gradually decreased with the increase of solid solution treatment and time, eventually the sizes of γ were completely uniform at the temperature of 1340

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Influence of Melt Superheating Treatment on Solidification Characteristics and Rupture Life of a Third-Generation Ni-Based Single-Crystal Superalloy

Metallurgical and Materials Transactions B ◽

10.1007/s11663-018-1256-1 ◽

2018 ◽

Vol 49 (4) ◽

pp. 1537-1546

Author(s):

Haijun Su ◽

Haifeng Wang ◽

Jun Zhang ◽

Min Guo ◽

Lin Liu ◽

...

Keyword(s):

Single Crystal ◽

Rupture Life ◽

Single Crystal Superalloy ◽

Third Generation

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Effects of Al on microstructural stability and related stress-rupture properties of a third-generation single crystal superalloy

Journal of Material Science and Technology ◽

10.1016/j.jmst.2019.05.003 ◽

2019 ◽

Vol 35 (11) ◽

pp. 2537-2542 ◽

Cited By ~ 4

Author(s):

Jingxia Sun ◽

Jinlai Liu ◽

Lirong Liu ◽

Yizhou Zhou ◽

Jinguo Li ◽

...

Keyword(s):

Single Crystal ◽

Stress Rupture ◽

Single Crystal Superalloy ◽

Third Generation ◽

Microstructural Stability ◽

Stress Rupture Properties ◽

Related Stress ◽

Rupture Properties

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Transverse Tensile Properties of a Nickel-based Third Generation Single Crystal Superalloy

Rare Metal Materials and Engineering ◽

10.1016/s1875-5372(18)30218-2 ◽

2018 ◽

Vol 47 (10) ◽

pp. 2964-2969

Author(s):

Yang Wanpeng ◽

Li Jiarong ◽

Liu Shizhong ◽

Shi Zhenxue ◽

Zhao Jinqian ◽

...

Keyword(s):

Single Crystal ◽

Tensile Properties ◽

Single Crystal Superalloy ◽

Third Generation ◽

Transverse Tensile

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

Materials Science Forum ◽

10.4028/www.scientific.net/msf.816.304 ◽

2015 ◽

Vol 816 ◽

pp. 304-309

Author(s):

Song Ming Han ◽

Wei Li ◽

Yue Ma ◽

Xin Bao Zhao ◽

Shu Suo Li ◽

...

Keyword(s):

Single Crystal ◽

Thermodynamic Calculation ◽

Volume Fraction ◽

Primary Dendrite ◽

Solution Treatment ◽

Experimental Results ◽

Single Crystal Superalloy ◽

Third Generation ◽

Primary Dendrite Arm Spacing ◽

Calculation Results

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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