Service Temperature Evaluation Based on Microstructural Degradation of Gas Turbine Blade after Cumulative Operation for 2 700 h

WANG Wei; JIANG Xiangwei; GAO Zhikun; CHI Qingxin; LI Hui; SHEN Jian; JIANG Sumeng; LOU Langhong

doi:10.11973/jxgccl201903004

Materials and Mechanical Engineering > 2019 > 43(3): 17-23. > DOI: 10.11973/jxgccl201903004

WANG Wei, JIANG Xiangwei, GAO Zhikun, CHI Qingxin, LI Hui, SHEN Jian, JIANG Sumeng, LOU Langhong. Service Temperature Evaluation Based on Microstructural Degradation of Gas Turbine Blade after Cumulative Operation for 2 700 h[J]. Materials and Mechanical Engineering, 2019, 43(3): 17-23. DOI: 10.11973/jxgccl201903004

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Service Temperature Evaluation Based on Microstructural Degradation of Gas Turbine Blade after Cumulative Operation for 2 700 h

1. AECC Shenyang Engine Research Institute, Shenyang 110015, China;
2. The Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

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Received Date: March 13, 2018
Revised Date: February 19, 2019

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Abstract

Abstract

Microstructure of gas turbine blade made of DZ411 alloy after cumulative operation for 2 700 h was analyzed and compared with the original microstructure. Combining with change of γ' phase in microstructure of DZ411 alloy rod after long-term thermal exposure at 900 ℃ and stress-rupture at 850 ℃ under different stresses (220, 260, 280, 300 MPa), service temperatures of the gas turbine blade were evaluated. The results show that after cumulative operation for 2 700 h, the microstructure at most positions in the blade exhibited no obvious degradation, indicating that the operation temperature at these positions was below 850 ℃. In a small number of areas at leading edge on section near blade tip, the γ' phase degradation at early stage was observed, and therefor it was deduced that these areas might be subjected to short-term high temperatures and the maximum temperature was higher than 900 ℃.
- service temperature,
- microstructure,
- degradation,
- DZ411 alloy,
- gas turbine blade

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Service Temperature Evaluation Based on Microstructural Degradation of Gas Turbine Blade after Cumulative Operation for 2 700 h

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