Creep/fatigue accelerated failure of Ni-based superalloy turbine blade: Microscopic characteristics and void migration mechanism

Lei Han; Peiyuan Li; Shengjie Yu; Cao Chen; Chengwei Fei; Cheng Lu

doi:10.1016/j.ijfatigue.2021.106558

Creep/fatigue accelerated failure of Ni-based superalloy turbine blade: Microscopic characteristics and void migration mechanism

Lei Han, Peiyuan Li, Shengjie Yu, Cao Chen, Chengwei Fei, Cheng Lu

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

Creep/fatigue accelerated failures of K403 superalloy turbine blades are inspected, and the damage behaviors are revealed and failure modes are determined in laboratory. It is concluded that: (1) significant discrepancies of fractographies and cross-sectional microstructures are interpreted by qualitative and quantitative investigations; (2) the observed morphologies are mainly attributed to the dendrite separation and γ' phase rafting behaviors, together with the development of ‘void migration mechanism’, i.e., grain interior → grain boundary → sub grain boundary; (3) the failure of turbine blade changes from the mixed to the intergranular mode, which is essentially controlled by the contribution proportion of creep damage and fatigue damage.

Original language	English
Article number	106558
Journal	International Journal of Fatigue
Volume	154
DOIs	https://doi.org/10.1016/j.ijfatigue.2021.106558
State	Published - Jan 2022
Externally published	Yes

Keywords

Creep/fatigue
Damage mechanism
Microscopic characteristic
Superalloy
Turbine blade

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10.1016/j.ijfatigue.2021.106558

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title = "Creep/fatigue accelerated failure of Ni-based superalloy turbine blade: Microscopic characteristics and void migration mechanism",

abstract = "Creep/fatigue accelerated failures of K403 superalloy turbine blades are inspected, and the damage behaviors are revealed and failure modes are determined in laboratory. It is concluded that: (1) significant discrepancies of fractographies and cross-sectional microstructures are interpreted by qualitative and quantitative investigations; (2) the observed morphologies are mainly attributed to the dendrite separation and γ' phase rafting behaviors, together with the development of {\textquoteleft}void migration mechanism{\textquoteright}, i.e., grain interior → grain boundary → sub grain boundary; (3) the failure of turbine blade changes from the mixed to the intergranular mode, which is essentially controlled by the contribution proportion of creep damage and fatigue damage.",

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T1 - Creep/fatigue accelerated failure of Ni-based superalloy turbine blade

T2 - Microscopic characteristics and void migration mechanism

AU - Han, Lei

AU - Li, Peiyuan

AU - Yu, Shengjie

AU - Chen, Cao

AU - Fei, Chengwei

AU - Lu, Cheng

PY - 2022/1

Y1 - 2022/1

N2 - Creep/fatigue accelerated failures of K403 superalloy turbine blades are inspected, and the damage behaviors are revealed and failure modes are determined in laboratory. It is concluded that: (1) significant discrepancies of fractographies and cross-sectional microstructures are interpreted by qualitative and quantitative investigations; (2) the observed morphologies are mainly attributed to the dendrite separation and γ' phase rafting behaviors, together with the development of ‘void migration mechanism’, i.e., grain interior → grain boundary → sub grain boundary; (3) the failure of turbine blade changes from the mixed to the intergranular mode, which is essentially controlled by the contribution proportion of creep damage and fatigue damage.

AB - Creep/fatigue accelerated failures of K403 superalloy turbine blades are inspected, and the damage behaviors are revealed and failure modes are determined in laboratory. It is concluded that: (1) significant discrepancies of fractographies and cross-sectional microstructures are interpreted by qualitative and quantitative investigations; (2) the observed morphologies are mainly attributed to the dendrite separation and γ' phase rafting behaviors, together with the development of ‘void migration mechanism’, i.e., grain interior → grain boundary → sub grain boundary; (3) the failure of turbine blade changes from the mixed to the intergranular mode, which is essentially controlled by the contribution proportion of creep damage and fatigue damage.

KW - Creep/fatigue

KW - Damage mechanism

KW - Microscopic characteristic

KW - Superalloy

KW - Turbine blade

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DO - 10.1016/j.ijfatigue.2021.106558

M3 - 文章

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Creep/fatigue accelerated failure of Ni-based superalloy turbine blade: Microscopic characteristics and void migration mechanism

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Keywords

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