Present Research Situation and Prospect of Hot Working of Cast & Wrought Superalloys for Aero-Engine Turbine Disk in China

doi:10.11900/0412.1961.2021.00153

Acta Metall Sin

2021, Vol. 57

Issue (10): 1215-1228 DOI: 10.11900/0412.1961.2021.00153

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Present Research Situation and Prospect of Hot Working of Cast & Wrought Superalloys for Aero-Engine Turbine Disk in China

ZHANG Rui¹, LIU Peng¹, CUI Chuanyong¹(

), QU Jinglong², ZHANG Beijiang², DU Jinhui², ZHOU Yizhou¹, SUN Xiaofeng¹

^1.Shi -Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^2.High-Temperature Materials Division, Central Iron and Steel Research Institute, Beijing 100081, China

Cite this article:

ZHANG Rui, LIU Peng, CUI Chuanyong, QU Jinglong, ZHANG Beijiang, DU Jinhui, ZHOU Yizhou, SUN Xiaofeng. Present Research Situation and Prospect of Hot Working of Cast & Wrought Superalloys for Aero-Engine Turbine Disk in China. Acta Metall Sin, 2021, 57(10): 1215-1228.

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Abstract

In recent years, the demand for high-performance aero-engines has become crucial in China, and the service environment of turbine disk alloy becomes increasingly severe. A series of high resistant cast & wrought superalloys for turbine disks, such as GH4065, GH4720Li, GH4068, and GH4151, with working temperatures > 700°C, have been studied, produced, and applied widely. The current studies on cast & wrought alloys for turbine disks in China were summarized under the categories of homogenization treatment, cogging, disk forging, and microstructure and property regulation to promote the development of these superalloys and improve their comprehensive properties. The difficulties encountered during the research and preparation of these hard-to-deform superalloys and explored the alloys' potential development trend were outlined. The review would improve the production stability of the disk superalloys and promote their development.

Key words: turbine disk cast & wrought superalloy hot working microstructure and property

Received: 12 April 2021

ZTFLH:

TG14

Fund: National Key Research and Development Program of China(2019YFA0705300、2017YFA-0700703);National Science and Technology Magjor Project of China(2019-VI-0006-0120);Doctoral Foundation of Liaoning Province(2020-BS-007);IMR Innovation Fund(2021-PY09)

About author: CUI Chuanyong, professor, Tel: (024)83978292, E-mail: chycui@imr.ac.cn

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	Rui ZHANG
	Peng LIU
	Chuanyong CUI
	Jinglong QU
	Beijiang ZHANG
	Jinhui DU
	Yizhou ZHOU
	Xiaofeng SUN

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https://www.ams.org.cn/EN/10.11900/0412.1961.2021.00153 OR https://www.ams.org.cn/EN/Y2021/V57/I10/1215

Fig.1 Alloying elements present in nickel-based superalloys^[10]

Table 1 Normal compositions of cast & wrought superalloys for aero-engine turbine disk^[11-14]

Table 2 Characteristic parameters of cast & wrought superalloys for aero-engine turbine disk^[15]

Fig.2 Microstructure of as-cast GH4151 alloy (vacuum induction melting (VIM) ingot with diameter of 80 mm)^[26]

Fig.3 Backscattered electron image of the interdendritic area (a) and elements distributions in the dendrite (b-h) of the solidified GH4720Li alloy^[27]

Fig.4 Microstructures of GH4065 alloy prepared by improper cogging process^[15]

Fig.5 Schematic of double-cone compression test^[34]

Fig.6 Microstructures of GH4068 alloy after homogenization treatment (a) and cogging (b) (Insets show the magnification of select boxes)

Fig.7 Dynamic recrystallization mechanisms of GH4068 alloy^[43]

Fig.8 Processing map of GH4068 alloy based on microstructure evolution ( $ε ˙$ —strain rate)^[37]

Fig.9 Processing map of U720Li alloy based on microstructure evolution^[42]

Fig.10 Superplasticity of GH4068 alloy with γ + γ' micro-duplex microstructure

Fig.11 Microstructures of γ' phase in GH4068 with different cooling of solution treatment^[48]

Table 3 High temperature endurance performances of cast & wrought superalloys for aero-engine turbine disk^[5,19]

Fig.12 Creep mechanisms of several typical disk superalloys^[48]

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