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Research Progress on the Hot Working of Hard-to-Deform Nickel-Based Superalloys for Turbine Disk Served Above 700 ℃(PDF)

MATERIALS CHINA[ISSN:1674-3962/CN:61-1473/TG]

Issue:
2024年第10期
Page:
902-911
Research Field:
Publishing date:

Info

Title:
Research Progress on the Hot Working of Hard-to-Deform Nickel-Based Superalloys for Turbine Disk Served Above 700 ℃
Author(s):
WU Jinjiang ZHAO Guangdi WANG Bo JIANG Haoyuan SUN Yixuan LIU Zhichao
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China
Keywords:
nickel-based wrought superalloy hot working process constitutive model processing map dynamic recrystallization
CLC:

PACS:
TG132.3
DOI:
10.7502/j.issn.1674-3962.202210002
DocumentCode:

Abstract:
The increasing thrust-weight ratio of aero-engines puts forward more stringent requirements for the high-temperature service performance of turbine disk alloys. The alloying degree and γ′ phase content of nickel-based wrought superalloys used in turbine disks with a service temperature of higher than 700 ℃ are extremely high, which significantly increases the deformation resistance, reduces the thermoplasticity and narrows the hot working window. Hence,cracking and structural instability are easy to occur during the hot deformation. This paper has introduced the hot working process of such hard-to-deform superalloys, corrections of friction and adiabatic heating effect, and construction methods of the constitutive model and processing map. Besides, the research progress on hot deformation behaviors of the typical hard-todeform superalloys, including Rene65, U720Li, ЭК151, ЭЛ975 and TMW has been reviewed. The future research direction of such alloys has been prospected, which can provide certain reference for optimization of the hot working process.

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Last Update: 2024-09-30