Effect of Stress Ratio on Fatigue Crack Growth Rate of EH36 Steel in the Marine Corrosive Environment

被引：0

作者：

Zhong Y. ^{[1
]}

Shao Y. ^{[1
]}

Gao X. ^{[2
]}

Luo X. ^{[2
]}

Zhu H. ^{[2
]}

Yang D. ^{[3
]}

机构：

[1] School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu

[2] School of Mechatronic Engineering, Southwest Petroleum University, Chengdu

[3] Technology Inspection Center, China Petroleum ＆ Chemical Corporation, Shandong, Dongying

来源：

Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 19期

基金：

中国国家自然科学基金;

关键词：

EH36; steel; fatigue crack growth rate; fracture morphology; seawater splash environment; stress ratio;

D O I：

10.11896/cldb.22050330

中图分类号：

学科分类号：

摘要：

EH36 steel is widely used in large offshore platforms due to its high strength, excellent toughness at low temperature and light weight. To evaluate the influence of stress ratio on the corrosion fatigue performance of EH36 steel in the marine corrosive environment, the fatigue crack growth tests of EH36 steel were carried out in laboratory air, seawater environment and splashing environment at three different stress ratios (R = 0.1, 0.3, 0.5), respectively. It is concluded that the fatigue crack growth rate of EH36 steel was accelerated by increasing stress ratio R in all three environments for a given value of the stress intensity factor range (ΔK). The stress ratio R has great influence on the crack growth rate in air, but has little effect on the material constants C and m. Increasing the stress ratio in the seawater and splashing environment promotes crack growth and changes the material constants C and m as well. It is evident that the crack growth rates in seawater and splashing environment are higher than those in the air under the same loading conditions, and the effects of both corrosion environments have almost identical effects on fatigue crack growth behavior. The fracture morphology of the specimens in the air environment shows quasi-cleavage fracture characteristics. It is almost the same fracture morphology in both corrosion environments, which is close to cleavage fracture. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

共 25 条

[1]

Zhu Q, Zhang P, Peng X, Et al., Materials, 14, 21, (2021)

[2]

Wahab M A, Sakano M., Journal of Materials Processing Technology, 118, 1-3, (2001)

[3]

Jia Z, Yang Y, He Z, Et al., Applied Ocean Research, 93, (2019)

[4]

Su M, Xu L, Peng C, Et al., International Journal of Fatigue, 156, (2022)

[5]

Hong B, Huang Y, Wu Z M., Journal of Water Resources and Architectural Engineering, 13, 5, (2015)

[6]

Cheng Y W., International Journal of Fatigue, 7, 2, (1985)

[7]

Weng L, Zhang J, Kalnaus S, Et al., International Journal of Fatigue, 48, (2013)

[8]

Hao W, Liu Z, Wu W, Et al., Materials Science and Engineering:A, 710, (2018)

[9]

Zhang S F, Zeng W D, Long Y, Et al., Rare Metal Materials and Engineering, 47, 12, (2018)

[10]

Guo H C, Wei H C, Yang D X, Et al., China Civil Engineering Journal, 54, 5, (2021)

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