The Microstructure Evolution of a Nickel-Base Single Crystal Superalloy after Long-Term Aging

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1088.217 ◽

2015 ◽

Vol 1088 ◽

pp. 217-220 ◽

Cited By ~ 1

Author(s):

Yu Xian Jia

Keyword(s):

Single Crystal ◽

Exposure Time ◽

Microstructure Evolution ◽

Ageing Time ◽

Thermal Exposure ◽

Single Crystal Superalloy ◽

Phase Precipitation ◽

Tcp Phase ◽

Nickel Base

Microstructure evolution of a nickel-base single crystal superalloy during thermal exposure at 982°C was investigated. The SEM studies revealed that the size of γ' phase increased and some of which linked together with the elongation of the exposure time. There is acicular phase precipitation after the long-term ageing treatment. The TCP phase is not increased by the increment of ageing time after reaching a certain amount. There are skeleton shape carbides precipitate after 100h and 300h. The amount of precipitated carbides decreases by the elongation of ageing time.

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The Influence of Thermal Exposure on the Microstructure Evolution of a Nickel-Base Single Crystal Superalloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.418-420.265 ◽

2011 ◽

Vol 418-420 ◽

pp. 265-269

Author(s):

Yu Xian Jia ◽

Tao Jin ◽

Jin Lai Liu

Keyword(s):

Single Crystal ◽

Exposure Time ◽

Microstructure Evolution ◽

Thermal Exposure ◽

Single Crystal Superalloy ◽

Matrix Channel ◽

Oriented Samples ◽

Tcp Phase ◽

Nickel Base ◽

Sem Studies

Microstructure evolution of a nickel-base single crystal superalloy on the [001], [011] and [111] orientation during thermal exposure at 1000°C was investigated. The SEM studies revealed that the size of γ' phase increased and some of which linked together with the elongation of the exposure time. After 1100h the cubic γ' phase hardly is observed, and the rafting structure becomes perfect. With growing and linking of γ' phase the γ matrix channel is widening gradually, and the direction of γ' rafts is not along one define orientation. The TCP phase is not found in the three oriented samples during the thermal exposure.

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Based on damage caused by microstructure evolution during long-term thermal exposure to analyze and predict creep behavior of Ni-based single crystal superalloy

AIP Advances ◽

10.1063/5.0018611 ◽

2020 ◽

Vol 10 (8) ◽

pp. 085301

Author(s):

Wenyan Gan ◽

Hangshan Gao ◽

Zhixun Wen

Keyword(s):

Single Crystal ◽

Microstructure Evolution ◽

Creep Behavior ◽

Thermal Exposure ◽

Single Crystal Superalloy

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Effect of Long-Term Aging on the Evolution of γ' and TCP Phases of a Ni3Al Based Single Crystal Superalloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.849.482 ◽

2016 ◽

Vol 849 ◽

pp. 482-487 ◽

Cited By ~ 1

Author(s):

Xin Zhou ◽

Jie Xiao ◽

Yan Ling Pei ◽

Shu Suo Li ◽

Sheng Kai Gong

Keyword(s):

Single Crystal ◽

Volume Fraction ◽

Thermal Exposure ◽

Single Crystal Superalloy ◽

High Temperature Strength ◽

Coarsening Behavior ◽

Heat Treated ◽

Tcp Phases ◽

Tcp Phase

The coarsening behavior of γ' phase and precipitation behavior of TCP phase in a Ni3Al based single crystal superalloy were investigated by experimental and calculation. The Re-containing and Mo-rich single crystal superalloy used in this study exhibit good high-temperature strength and oxidation resistance. After fully heat-treated, the experimental superalloys were aged at 1050°C and 1150°C for different time periods from 50h to 1000h. The microstructure after thermal exposure was examined by field emission-scanning electron microscopy (FE-SEM). The results indicated that the coarsening behavior of γ' phase agrees well with the typical Lifshitz-Slyozov-Wagner (LSW) theory. After thermal exposure, both the size and the volume fraction of the TCP phase changed perceptibly.

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