Effect of Ru on Microstructure of a Single Crystal Nickel-Base Superalloy

2007 ◽  
Vol 546-549 ◽  
pp. 1195-1200 ◽  
Author(s):  
Wen You Ma ◽  
Ya Fang Han ◽  
Shu Suo Li ◽  
Yun Rong Zheng ◽  
Sheng Kai Gong
Keyword(s):  
Growth Rate ◽  
High Temperature ◽  
Single Crystal ◽  
Nickel Base Superalloy ◽  
High Temperature Exposure ◽  
Refractory Elements ◽  
Tcp Phase ◽  
Nickel Base ◽  
Temperature Exposure ◽  
Base Superalloy

The effect of Ru on the microstructure of a high content refractory elements nickel base Superalloy has been studied in the present investigation. The results showed that, the adding of 3%Ru did not prevent the precipitation of TCP phase during high temperature exposure, and even accelerated the formation of TCP phase,however the addition of Ru decreased the growth rate of μ phase significantly. In addition, the adding of Ru decreased the solving temperature of γ/γ′ eutectic by 5°C, and increased the tendency of γ′ rafting during high temperature exposure.

Evaluation of Multicomponent Nickel Base LI2 and Other Intermetallic Alloys as High Temperature Structural Materials

1986 ◽  
Vol 81 ◽  
Author(s):  
D. M. Shah ◽  
D. N. Duhl
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Single Crystals ◽  
Impact Resistance ◽  
High Strength ◽  
Structural Materials ◽  
Nickel Base Superalloy ◽  
Intermetallic Alloys ◽  
Nickel Base ◽  
Base Superalloy

AbstractMulticomponent nickel base intermetallics with the L12 structure were evaluated as high temperature structural materials. The compounds were based on the γ' composition of PWA 1480, a high strength single crystal nickel base superalloy. The best balance of properties in the compound was achieved with <111> oriented single crystals but no significant advantage could be demonstrated over the precipitation hardened superalloys. Insufficient impact resistance was a major deficiency of the L12 compounds. Other nickel base intermetallics were also evaluated but showed little advantage over superalloys.

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