Degradation Behavior of Microstructures and Mechanical Properties of GTD111 Turbine Blade After Long-Term Service

被引：0

作者：

Xu Hui ^{[1
,2
]}

Guo Yanjun ^{[1
]}

Wang Jiangwei ^{[2
]}

Wang Lu ^{[1
]}

Li Xiaohui ^{[1
]}

Qiao Lijie ^{[1
]}

Qiu Zhibin ^{[1
]}

机构：

[1] Huadian Elect Power Res Inst Co Ltd, Mat Res Ctr, Hangzhou 310030, Peoples R China

[2] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2023年 / 52卷 / 06期

关键词：

turbine blade; microstructure; gamma' precipitate; carbide; mechanical property; NICKEL-BASED SUPERALLOY; PRIMARY MC CARBIDE; DEFORMATION MECHANISM; TENSILE PROPERTIES; BASE SUPERALLOY; HOT CORROSION; PRECIPITATION; DECOMPOSITION; TEMPERATURE; IMPROVEMENT;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of microstructures and mechanical properties stimulated by long-term service was investigated using a GTD111 blade employed in the first stage rotor blade of a heavy-duty gas turbine. Results show that the microstructures of the blade are mainly composed of. matrix,.' precipitates with two dimensions,gamma +gamma' eutectic and MC-type carbides. The microstructural degradation of the blade is closely related to its structural characteristics. Samples from leading edge and middle region of the blade exhibit a relatively lower degree of microstructural degradation, while samples from trailing edge of the blade possess higher degree of microstructural degradation. The ultimate tensile strength (UTS) of the leading edge region is significantly higher than that of the trailing edge region at room temperature, but the UTS of different regions has little difference at 982 degrees C, which may be related to different deformation mechanisms at higher temperatures.

引用

页码：2057 / 2062

页数：6

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