Study on the high-temperteraure tensile property and damage behavior in GH4141 superalloy

Zhang Zhao; Pei Binghong; Feng Xu; Xin Ruishan; Guo Xiaodong; Xiao Dongping; Zhou Yang

doi:10.7513/j.issn.1004-7638.2024.01.022

Volume 45 Issue 1

Feb. 2024

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Zhang Zhao, Pei Binghong, Feng Xu, Xin Ruishan, Guo Xiaodong, Xiao Dongping, Zhou Yang. Study on the high-temperteraure tensile property and damage behavior in GH4141 superalloy[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(1): 152-157. doi: 10.7513/j.issn.1004-7638.2024.01.022

Citation:

Zhang Zhao, Pei Binghong, Feng Xu, Xin Ruishan, Guo Xiaodong, Xiao Dongping, Zhou Yang. Study on the high-temperteraure tensile property and damage behavior in GH4141 superalloy[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(1): 152-157. doi: 10.7513/j.issn.1004-7638.2024.01.022

Citation:

Zhang Zhao, Pei Binghong, Feng Xu, Xin Ruishan, Guo Xiaodong, Xiao Dongping, Zhou Yang. Study on the high-temperteraure tensile property and damage behavior in GH4141 superalloy[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(1): 152-157. doi: 10.7513/j.issn.1004-7638.2024.01.022

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Study on the high-temperteraure tensile property and damage behavior in GH4141 superalloy

doi: 10.7513/j.issn.1004-7638.2024.01.022

1.
Ansteel Beijing Research Institute Co., Ltd., Beijing 102200, China
2.
State Key Laboratory of Metal Materials for Marine Equipment and Application, Anshan 114009, Liaoning, China
3.
Pangang Group Jiangyou Changcheng Special Steel Co., Ltd., Jiangyou 621704, Sichuan, China
4.
Chengdu Advanced Metal Materials Industrial Technology Institute Co., Ltd., Chengdu 610303, Sichuan, China

More Information

Received Date: 2023-02-02
Publish Date: 2024-02-29

Abstract

Abstract

This study focuses on the tensile properties of GH4141 superalloy tested at room temperature, 300 ℃ and 500 ℃, respectively. The tensile strength obtained at high temperatures of 300 ℃ and 500 ℃ with serrated stress-strain curves are lower than that obtained at room temperature. In addition, the tensile strength tested at 500 ℃ is comparable to the value achieved at 300 ℃. The microstructure near the fracture surface of the superalloy is characterized. It is showed that cracks are formed at the grain boundary, irrespective of the observation of MC type carbides. The carbide composed of M₆C and M₂₃C₆ with chain morphology endows grain boundary with a good plasticity which is reflected by numerous dimples in the fractographs. The initiation of cracks within the grains is associated with formation of slip bands. The activation of slip band can be delayed by dislocation pinning effect related to the interstitial elements, substituted elements and the γ′ strengthening precipitate phase. It should be noted that recrystallization occurred during tensile testing at 500 ℃ with a few carbides observed in the vicinity of fracture surface, while the intergranular fracture phenomenon was attenuated. However, the fractography of specimens tested at 300 ℃ exhibit both intergranular and transgranular fracture without recrystallization.
- GH4141 superalloy,
- high temperature tensile property,
- dynamic strain aging,
- damage,
- carbides

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References(15)

References

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