Cyclic deformation and damage mechanisms of 9%Cr steel under hybrid stress-strain controlled creep fatigue interaction loadings

Tianyu Zhang; Xiaowei Wang; Yunnan Ji; Jianqun Tang; Yong Jiang; Xiancheng Zhang; Jianming Gong

doi:10.1016/j.ijfatigue.2021.106357

Cyclic deformation and damage mechanisms of 9%Cr steel under hybrid stress-strain controlled creep fatigue interaction loadings

Tianyu Zhang, Xiaowei Wang, Yunnan Ji, Jianqun Tang, Yong Jiang, Xiancheng Zhang, Jianming Gong

School of Mechanical and Power Engineering

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

21 Scopus citations

Abstract

The hybrid stress–strain controlled creep-fatigue interaction (HCFI) loadings at various dwell conditions were conducted on 9%Cr steel at 625 °C to investigate the deformation and damage mechanisms. Results reveal that the HCFI tests with conservative dwell conditions show complicated cyclic responses and low creep strain. The failure specimens demonstrate strong creep-fatigue interaction damage (CFID) with many branched surface cracks. With the increase in dwell stress and time, the HCFI tests show continuous softening and remarkable creep deformation. The creep-dominant damage (CDD) featured by internal creep cavities and blunt surface cracks leads to the final failure.

Original language	English
Article number	106357
Journal	International Journal of Fatigue
Volume	151
DOIs	https://doi.org/10.1016/j.ijfatigue.2021.106357
State	Published - Oct 2021

Keywords

Creep-fatigue interaction
Deformation behavior
Hybrid stress-strain controlled
Microstructure evolution

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10.1016/j.ijfatigue.2021.106357

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title = "Cyclic deformation and damage mechanisms of 9%Cr steel under hybrid stress-strain controlled creep fatigue interaction loadings",

abstract = "The hybrid stress–strain controlled creep-fatigue interaction (HCFI) loadings at various dwell conditions were conducted on 9%Cr steel at 625 °C to investigate the deformation and damage mechanisms. Results reveal that the HCFI tests with conservative dwell conditions show complicated cyclic responses and low creep strain. The failure specimens demonstrate strong creep-fatigue interaction damage (CFID) with many branched surface cracks. With the increase in dwell stress and time, the HCFI tests show continuous softening and remarkable creep deformation. The creep-dominant damage (CDD) featured by internal creep cavities and blunt surface cracks leads to the final failure.",

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author = "Tianyu Zhang and Xiaowei Wang and Yunnan Ji and Jianqun Tang and Yong Jiang and Xiancheng Zhang and Jianming Gong",

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T1 - Cyclic deformation and damage mechanisms of 9%Cr steel under hybrid stress-strain controlled creep fatigue interaction loadings

AU - Zhang, Tianyu

AU - Wang, Xiaowei

AU - Ji, Yunnan

AU - Tang, Jianqun

AU - Jiang, Yong

AU - Zhang, Xiancheng

AU - Gong, Jianming

PY - 2021/10

Y1 - 2021/10

N2 - The hybrid stress–strain controlled creep-fatigue interaction (HCFI) loadings at various dwell conditions were conducted on 9%Cr steel at 625 °C to investigate the deformation and damage mechanisms. Results reveal that the HCFI tests with conservative dwell conditions show complicated cyclic responses and low creep strain. The failure specimens demonstrate strong creep-fatigue interaction damage (CFID) with many branched surface cracks. With the increase in dwell stress and time, the HCFI tests show continuous softening and remarkable creep deformation. The creep-dominant damage (CDD) featured by internal creep cavities and blunt surface cracks leads to the final failure.

AB - The hybrid stress–strain controlled creep-fatigue interaction (HCFI) loadings at various dwell conditions were conducted on 9%Cr steel at 625 °C to investigate the deformation and damage mechanisms. Results reveal that the HCFI tests with conservative dwell conditions show complicated cyclic responses and low creep strain. The failure specimens demonstrate strong creep-fatigue interaction damage (CFID) with many branched surface cracks. With the increase in dwell stress and time, the HCFI tests show continuous softening and remarkable creep deformation. The creep-dominant damage (CDD) featured by internal creep cavities and blunt surface cracks leads to the final failure.

KW - Creep-fatigue interaction

KW - Deformation behavior

KW - Hybrid stress-strain controlled

KW - Microstructure evolution

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DO - 10.1016/j.ijfatigue.2021.106357

M3 - 文章

AN - SCOPUS:85107679919

SN - 0142-1123

VL - 151

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 106357

ER -

Cyclic deformation and damage mechanisms of 9%Cr steel under hybrid stress-strain controlled creep fatigue interaction loadings

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Keywords

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