Near-threshold fatigue crack growth behavior of 10% Cr martensitic steel welded joint with 9% Cr weld metal in high temperature air

Qixing Sun; Kejian Li; Xiaogang Li; Shao Shi Rui; Zhipeng Cai; Jiluan Pan

doi:10.1016/j.ijfatigue.2020.105650

Near-threshold fatigue crack growth behavior of 10% Cr martensitic steel welded joint with 9% Cr weld metal in high temperature air

Qixing Sun
, Kejian Li
, Xiaogang Li
, Shao Shi Rui^*
, Zhipeng Cai
, Jiluan Pan

^*此作品的通讯作者

Tsinghua University
Key Laboratory of Precision Opto-Mechatronics Technology (Ministry of Education)

科研成果: 期刊稿件 › 文章 › 同行评审

21 引用（Scopus）

摘要

The near-threshold fatigue crack growth (FCG) behavior under different stress ratios (R) of a 9%–12% Cr steel welded joint was studied in 538 °C air. The most significant oxide-induced crack closure (OICC) occurred in weld metal (WM) due to the lowest Cr content, resulting in the highest threshold value (ΔK_th) of WM. The base metal (BM) with coarser grains and denser lath structures had more obvious roughness-induced crack closure (RICC) and more severe crack deflection, which led to a higher ΔK_th of BM than heat affected zone (HAZ). The ΔK_th of WM, HAZ and BM decreased as R increased.

源语言	英语
文章编号	105650
期刊	International Journal of Fatigue
卷	137
DOI	https://doi.org/10.1016/j.ijfatigue.2020.105650
出版状态	已出版 - 8月 2020
已对外发布	是

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@article{d6378eab16eb41e8a5b6986d44aa3244,

title = "Near-threshold fatigue crack growth behavior of 10\% Cr martensitic steel welded joint with 9\% Cr weld metal in high temperature air",

abstract = "The near-threshold fatigue crack growth (FCG) behavior under different stress ratios (R) of a 9\%–12\% Cr steel welded joint was studied in 538 °C air. The most significant oxide-induced crack closure (OICC) occurred in weld metal (WM) due to the lowest Cr content, resulting in the highest threshold value (ΔKth) of WM. The base metal (BM) with coarser grains and denser lath structures had more obvious roughness-induced crack closure (RICC) and more severe crack deflection, which led to a higher ΔKth of BM than heat affected zone (HAZ). The ΔKth of WM, HAZ and BM decreased as R increased.",

keywords = "Crack closure, Fatigue crack growth, High temperature air, Martensitic steel welded joint, Threshold value",

author = "Qixing Sun and Kejian Li and Xiaogang Li and Rui, \{Shao Shi\} and Zhipeng Cai and Jiluan Pan",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = aug,

doi = "10.1016/j.ijfatigue.2020.105650",

language = "英语",

volume = "137",

journal = "International Journal of Fatigue",

issn = "0142-1123",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Near-threshold fatigue crack growth behavior of 10% Cr martensitic steel welded joint with 9% Cr weld metal in high temperature air

AU - Sun, Qixing

AU - Li, Kejian

AU - Li, Xiaogang

AU - Rui, Shao Shi

AU - Cai, Zhipeng

AU - Pan, Jiluan

PY - 2020/8

Y1 - 2020/8

N2 - The near-threshold fatigue crack growth (FCG) behavior under different stress ratios (R) of a 9%–12% Cr steel welded joint was studied in 538 °C air. The most significant oxide-induced crack closure (OICC) occurred in weld metal (WM) due to the lowest Cr content, resulting in the highest threshold value (ΔKth) of WM. The base metal (BM) with coarser grains and denser lath structures had more obvious roughness-induced crack closure (RICC) and more severe crack deflection, which led to a higher ΔKth of BM than heat affected zone (HAZ). The ΔKth of WM, HAZ and BM decreased as R increased.

AB - The near-threshold fatigue crack growth (FCG) behavior under different stress ratios (R) of a 9%–12% Cr steel welded joint was studied in 538 °C air. The most significant oxide-induced crack closure (OICC) occurred in weld metal (WM) due to the lowest Cr content, resulting in the highest threshold value (ΔKth) of WM. The base metal (BM) with coarser grains and denser lath structures had more obvious roughness-induced crack closure (RICC) and more severe crack deflection, which led to a higher ΔKth of BM than heat affected zone (HAZ). The ΔKth of WM, HAZ and BM decreased as R increased.

KW - Crack closure

KW - Fatigue crack growth

KW - High temperature air

KW - Martensitic steel welded joint

KW - Threshold value

UR - https://www.scopus.com/pages/publications/85083398430

U2 - 10.1016/j.ijfatigue.2020.105650

DO - 10.1016/j.ijfatigue.2020.105650

M3 - 文章

AN - SCOPUS:85083398430

SN - 0142-1123

VL - 137

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 105650

ER -

Near-threshold fatigue crack growth behavior of 10% Cr martensitic steel welded joint with 9% Cr weld metal in high temperature air

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