On the microstructural evolution and room-temperature creep behaviour of 9%Cr steel weld joint under prior creep–fatigue interaction

Yuxuan Song; Furao Qin; Jianan Chen; Zhouxin Pan; Xianwei Huang; Zhenyu Ding; Zengliang Gao; Taihua Zhang; Yi Ma

doi:10.1111/ffe.13370

On the microstructural evolution and room-temperature creep behaviour of 9%Cr steel weld joint under prior creep–fatigue interaction

Yuxuan Song
, Furao Qin
, Jianan Chen
, Zhouxin Pan
, Xianwei Huang
, Zhenyu Ding
, Zengliang Gao
, Taihua Zhang
, Yi Ma^*

^*Corresponding author for this work

School of Aeronautic Science and Engineering

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

19 Scopus citations

Abstract

The high-temperature creep–fatigue (CF) interaction on the service damage of P92 welded joint was uncovered based on the evolution of local creep behaviour by nanoindentation. The creep resistance and high-angle grain boundary (HAGB) distributions of the different regions of welded joint were investigated for the specimens under individual creep (stress relaxation [RS]), fatigue and CF loadings interrupted at lifetime fractions of 10%, 20%, 30%, 60% and 100%. According to structure evolution including the changes of HAGB and dislocation densities during high-temperature deformation, the local variation mechanism of creep behaviour at different microstructural zones was systematically discussed.

Original language	English
Pages (from-to)	444-460
Number of pages	17
Journal	Fatigue and Fracture of Engineering Materials and Structures
Volume	44
Issue number	2
DOIs	https://doi.org/10.1111/ffe.13370
State	Published - Feb 2021

Keywords

9%Cr steel
creep
creep–fatigue interaction
nanoindentation
strain rate sensitivity
welded joint

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10.1111/ffe.13370

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title = "On the microstructural evolution and room-temperature creep behaviour of 9\%Cr steel weld joint under prior creep–fatigue interaction",

abstract = "The high-temperature creep–fatigue (CF) interaction on the service damage of P92 welded joint was uncovered based on the evolution of local creep behaviour by nanoindentation. The creep resistance and high-angle grain boundary (HAGB) distributions of the different regions of welded joint were investigated for the specimens under individual creep (stress relaxation [RS]), fatigue and CF loadings interrupted at lifetime fractions of 10\%, 20\%, 30\%, 60\% and 100\%. According to structure evolution including the changes of HAGB and dislocation densities during high-temperature deformation, the local variation mechanism of creep behaviour at different microstructural zones was systematically discussed.",

keywords = "9\%Cr steel, creep, creep–fatigue interaction, nanoindentation, strain rate sensitivity, welded joint",

author = "Yuxuan Song and Furao Qin and Jianan Chen and Zhouxin Pan and Xianwei Huang and Zhenyu Ding and Zengliang Gao and Taihua Zhang and Yi Ma",

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year = "2021",

month = feb,

doi = "10.1111/ffe.13370",

language = "英语",

volume = "44",

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T1 - On the microstructural evolution and room-temperature creep behaviour of 9%Cr steel weld joint under prior creep–fatigue interaction

AU - Song, Yuxuan

AU - Qin, Furao

AU - Chen, Jianan

AU - Pan, Zhouxin

AU - Huang, Xianwei

AU - Ding, Zhenyu

AU - Gao, Zengliang

AU - Zhang, Taihua

AU - Ma, Yi

PY - 2021/2

Y1 - 2021/2

N2 - The high-temperature creep–fatigue (CF) interaction on the service damage of P92 welded joint was uncovered based on the evolution of local creep behaviour by nanoindentation. The creep resistance and high-angle grain boundary (HAGB) distributions of the different regions of welded joint were investigated for the specimens under individual creep (stress relaxation [RS]), fatigue and CF loadings interrupted at lifetime fractions of 10%, 20%, 30%, 60% and 100%. According to structure evolution including the changes of HAGB and dislocation densities during high-temperature deformation, the local variation mechanism of creep behaviour at different microstructural zones was systematically discussed.

AB - The high-temperature creep–fatigue (CF) interaction on the service damage of P92 welded joint was uncovered based on the evolution of local creep behaviour by nanoindentation. The creep resistance and high-angle grain boundary (HAGB) distributions of the different regions of welded joint were investigated for the specimens under individual creep (stress relaxation [RS]), fatigue and CF loadings interrupted at lifetime fractions of 10%, 20%, 30%, 60% and 100%. According to structure evolution including the changes of HAGB and dislocation densities during high-temperature deformation, the local variation mechanism of creep behaviour at different microstructural zones was systematically discussed.

KW - 9%Cr steel

KW - creep

KW - creep–fatigue interaction

KW - nanoindentation

KW - strain rate sensitivity

KW - welded joint

UR - https://www.scopus.com/pages/publications/85094153709

U2 - 10.1111/ffe.13370

DO - 10.1111/ffe.13370

M3 - 文章

AN - SCOPUS:85094153709

SN - 8756-758X

VL - 44

SP - 444

EP - 460

JO - Fatigue and Fracture of Engineering Materials and Structures

JF - Fatigue and Fracture of Engineering Materials and Structures

IS - 2

ER -

On the microstructural evolution and room-temperature creep behaviour of 9%Cr steel weld joint under prior creep–fatigue interaction

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