Effect of Solution Cooling Rate on Microstructure and Creep Properties of FGH97 Nickel-base Superalloy of Large Turbine Disk

被引：0

作者：

Zhang Hai ^{[1
]}

Zou Zhihuan ^{[1
]}

Long Anping ^{[1
]}

Wang Chong ^{[1
]}

Ou Yetao ^{[1
]}

机构：

[1] Shenzhen Wedge Cent South Res Inst Co Ltd, Shenzhen 518045, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2020年 / 49卷 / 07期

关键词：

powder metallurgy superalloys; microstructure; creep; fracture; GB carbides; PERFORMANCE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

FGH97 nickel-base superalloy was processed at different solution cooling rates. Then the microstructure and creep behavior of the superalloy were studied by optical microscope, scanning electron microscope, energy disperse spectroscopy and creep testing machine. The results show that the size of gamma' precipitates decreases and the carbide precipitation changes from continuous to discrete with the increase of the solution cooling rate, and GB carbides are rich in Ti, Nb, and Hf. The creep performance of the alloy with a solution cooling rate of 94 degrees C/min is significantly better than that with a cooling rate of 43 degrees C/min under 750 degrees C/450 MPa. gamma' cutting is the deformation mechanism of FGH97 alloy under 750 degrees C/450 MPa, stress concentration at grain boundary leads to initial cracks, which then propagate along grain boundary and finally lead to fracture. The disperse-distribution carbides on grain boundary can inhibit the propagation of microcracks.

引用

页码：2488 / 2493

页数：6

共 18 条

[1] Creep performance and damage mechanism for Allvac 718Plus superalloy [J].

Chen, Kai ;

Dong, Jianxin ;

Yao, Zhihao ;

Ni, Tongwei ;

Wang, Minqing .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 738 :308-322

[2] The effect of stress on primary MC carbides degeneration of Waspaloy during long term thermal exposure [J].

Chen, Xiaofei ;

Yao, Zhihao ;

Dong, Jianxin ;

Shen, Hongwei ;

Wang, Yu .

JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 735 :928-937

[3]

Guo Jianting, 2010, MAT SCI ENG SUPERALL, P93

[4]

[郭茂文 Guo Maowen], 2017, [热加工工艺, Hot Working Technology], V46, P11

[5] Effective solution treatment can result in improved creep performance of superalloys [J].

Jia, Chonglin ;

Zhang, Fenglin ;

Wei, Kang ;

Lv, Shaomin .

JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 770 :166-174

[6]

Li Yuqin, 1990, GRAIN BOUNDARY INTER, P276

[7] Influence of cooling rate on the development of multiple generations of γ′ precipitates in a commercial nickel base superalloy [J].

Singh, A. R. P. ;

Nag, S. ;

Hwang, J. Y. ;

Viswanathan, G. B. ;

Tiley, J. ;

Srinivasan, R. ;

Fraser, H. L. ;

Banerjee, R. .

MATERIALS CHARACTERIZATION, 2011, 62 (09) :878-886

[8]

The Society of High-temperature Materials of the Chinese Society of Metals, 2012, CHINA SUPERALLOYS HD, P612

[9]

Tian SG, 2011, RARE METAL MAT ENG, V40, P807

[10]

Tong J Y, 2014, MAT SCI ENG A-STRUCT, V618, P05

← 1 2 →