Semi-quantitative creep-fatigue damage analysis based on diffraction-based misorientation mapping and the correlation to macroscopic damage evolutions

Run Zi Wang; Lv Yi Cheng; Shun Peng Zhu; Peng Cheng Zhao; Hideo Miura; Xian Cheng Zhang; Shan Tung Tu

doi:10.1016/j.ijfatigue.2021.106227

Semi-quantitative creep-fatigue damage analysis based on diffraction-based misorientation mapping and the correlation to macroscopic damage evolutions

Run Zi Wang, Lv Yi Cheng, Shun Peng Zhu, Peng Cheng Zhao, Hideo Miura, Xian Cheng Zhang, Shan Tung Tu

ENG - Fracture and Reliability Research Institute

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

Abstract

A large number of strain-controlled creep-fatigue tests under wide loading waveforms are conducted at 650 ℃ in nickel-based forged GH4169 superalloy. Comprehensive characterizations, including scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM), are observed from the post-test examinations. Particular focus is brought to the physical understanding of damage mechanisms under wide creep-fatigue loading conditions using EBSD analysis. The representative misorientation parameters are calculated for constructing diffraction-based misorientation mapping. Semi-quantitative analysis of longitudinal EBSD observations is conducted to prove that strain ratio has little influence on creep-fatigue damage degrees, while dwell time causes noticeable changes to damage progressions. In particular for geometrically necessary dislocation (GND) map explored in this work, more fundamental information based on failure physics is obtained to analyze the creep-fatigue crack initiation mechanism.

Original language	English
Article number	106227
Journal	International Journal of Fatigue
Volume	149
DOIs	https://doi.org/10.1016/j.ijfatigue.2021.106227
Publication status	Published - 2021 Aug

Keywords

Crack initiation mechanism
EBSD analysis
Geometrically necessary dislocation
Misorientation

ASJC Scopus subject areas

Modelling and Simulation
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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Semi-quantitative creep-fatigue damage analysis based on diffraction-based misorientation mapping and the correlation to macroscopic damage evolutions. / Wang, Run Zi; Cheng, Lv Yi; Zhu, Shun Peng; Zhao, Peng Cheng; Miura, Hideo; Zhang, Xian Cheng; Tu, Shan Tung.

In: International Journal of Fatigue, Vol. 149, 106227, 08.2021.

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

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title = "Semi-quantitative creep-fatigue damage analysis based on diffraction-based misorientation mapping and the correlation to macroscopic damage evolutions",

abstract = "A large number of strain-controlled creep-fatigue tests under wide loading waveforms are conducted at 650 ℃ in nickel-based forged GH4169 superalloy. Comprehensive characterizations, including scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM), are observed from the post-test examinations. Particular focus is brought to the physical understanding of damage mechanisms under wide creep-fatigue loading conditions using EBSD analysis. The representative misorientation parameters are calculated for constructing diffraction-based misorientation mapping. Semi-quantitative analysis of longitudinal EBSD observations is conducted to prove that strain ratio has little influence on creep-fatigue damage degrees, while dwell time causes noticeable changes to damage progressions. In particular for geometrically necessary dislocation (GND) map explored in this work, more fundamental information based on failure physics is obtained to analyze the creep-fatigue crack initiation mechanism.",

keywords = "Crack initiation mechanism, EBSD analysis, Geometrically necessary dislocation, Misorientation",

author = "Wang, {Run Zi} and Cheng, {Lv Yi} and Zhu, {Shun Peng} and Zhao, {Peng Cheng} and Hideo Miura and Zhang, {Xian Cheng} and Tu, {Shan Tung}",

note = "Funding Information: This work was supported financially by the National Key Research and Development Program of China (2018YFC1902404), the National Natural Science Foundation of China (Nos. 51725503 and 52005185) and 111 Project. Zhang XC is also grateful for the Innovation Program of Shanghai Municipal Education Commission (2019-01-07-00-02-E00068). Wang RZ and Miura H also gratefully acknowledge the supports of the Postdoctoral Fellowships for Research in Japan (FY2020 P20350) by the Japan Society for the Promotion of Science (JSPS). Publisher Copyright: {\textcopyright} 2021",

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doi = "10.1016/j.ijfatigue.2021.106227",

language = "English",

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AU - Zhao, Peng Cheng

AU - Miura, Hideo

AU - Zhang, Xian Cheng

AU - Tu, Shan Tung

N1 - Funding Information: This work was supported financially by the National Key Research and Development Program of China (2018YFC1902404), the National Natural Science Foundation of China (Nos. 51725503 and 52005185) and 111 Project. Zhang XC is also grateful for the Innovation Program of Shanghai Municipal Education Commission (2019-01-07-00-02-E00068). Wang RZ and Miura H also gratefully acknowledge the supports of the Postdoctoral Fellowships for Research in Japan (FY2020 P20350) by the Japan Society for the Promotion of Science (JSPS). Publisher Copyright: © 2021

PY - 2021/8

Y1 - 2021/8

N2 - A large number of strain-controlled creep-fatigue tests under wide loading waveforms are conducted at 650 ℃ in nickel-based forged GH4169 superalloy. Comprehensive characterizations, including scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM), are observed from the post-test examinations. Particular focus is brought to the physical understanding of damage mechanisms under wide creep-fatigue loading conditions using EBSD analysis. The representative misorientation parameters are calculated for constructing diffraction-based misorientation mapping. Semi-quantitative analysis of longitudinal EBSD observations is conducted to prove that strain ratio has little influence on creep-fatigue damage degrees, while dwell time causes noticeable changes to damage progressions. In particular for geometrically necessary dislocation (GND) map explored in this work, more fundamental information based on failure physics is obtained to analyze the creep-fatigue crack initiation mechanism.

AB - A large number of strain-controlled creep-fatigue tests under wide loading waveforms are conducted at 650 ℃ in nickel-based forged GH4169 superalloy. Comprehensive characterizations, including scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM), are observed from the post-test examinations. Particular focus is brought to the physical understanding of damage mechanisms under wide creep-fatigue loading conditions using EBSD analysis. The representative misorientation parameters are calculated for constructing diffraction-based misorientation mapping. Semi-quantitative analysis of longitudinal EBSD observations is conducted to prove that strain ratio has little influence on creep-fatigue damage degrees, while dwell time causes noticeable changes to damage progressions. In particular for geometrically necessary dislocation (GND) map explored in this work, more fundamental information based on failure physics is obtained to analyze the creep-fatigue crack initiation mechanism.

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Semi-quantitative creep-fatigue damage analysis based on diffraction-based misorientation mapping and the correlation to macroscopic damage evolutions

Abstract

Keywords

ASJC Scopus subject areas

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