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Evaluation of Fatigue and Creep-Fatigue Damage of Steel
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Evaluation of Fatigue and Creep-Fatigue Damage of Steel

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: closed (20 November 2024) | Viewed by 1750

Special Issue Editor

Dr. Bin Yang

E-Mail Website
Guest Editor
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
Interests: steel; smart manufacturing; advanced energy structure materials; light metal structure-function integrated materials; new nanocrystalline and high-entropy alloys

Special Issue Information

Dear Colleagues,

Fatigue is the gradual process of crack initiation and propagation in materials subjected to repetitive loading, while creep-fatigue combines the creep characteristics of materials with loading at elevated temperatures. Steel is widely used in engineering applications, and thus the evaluation of its fatigue and creep-fatigue properties is crucial. The fatigue and creep-fatigue damage of steel in usage environments is one of the most common failure modes for steels. The purpose of this Special Issue on “Evaluation of Fatigue and Creep-Fatigue Damage of Steel” is to explore the complex relationship between performance, processing, microstructure, and environmental degradation in steels and various environments.

This Special Issue delves into the assessment of fatigue and creep-fatigue damage in steel over prolonged usage periods. Encompassing various aspects, including fundamental principles, testing methodologies, numerical simulations, and practical engineering applications, articles within this Special Issue can focus on the fatigue life of steel under different loads and temperature conditions, as well as theoretical analyses of creep-fatigue damage mechanisms. These evaluations guide the design and utilization of steel in practical engineering, aiming to enhance its performance and durability. Furthermore, modifications to steel materials aimed at enhancing their fatigue and creep resistance are welcomed, alongside an exploration of the potential applications of material design and structural optimization in mitigating fatigue and creep-fatigue damage.

This Special Issue will cover the fatigue and creep-fatigue damage of steel in different environments as well as different industries (transportation, energy, oil and gas, nuclear, etc.) and process history (cast, wrought, and additive manufacturing).

Overall, this Special Issue invites contributions from academia, researchers, industry professionals, and engineers.

Dr. Bin Yang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • creep
  • fatigue
  • corrosion fatigue
  • creep-fatigue
  • steels

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Published Papers (4 papers)

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Research

14 pages, 8356 KiB  
Article
Residual Stress Measurement Using EMAT for X80 Pipeline Steel: Effects of Coating Thickness and Surface Roughness Under Low Surface Preparation Requirements
by Chunlang Luo, Bing Chen, Li Xia, Lintao Xu, Xuan Liu, Sunmin Zou, Dongchuan Peng and Guoqing Gou
Materials 2024, 17(23), 5799; https://doi.org/10.3390/ma17235799 (registering DOI) - 26 Nov 2024
Abstract
The residual stress significantly affects the operational safety of oil and gas pipelines. Traditional ultrasonic stress measurement methods require pipeline surface pretreatment, which reduces detection efficiency. EMAT, as a non-contact measurement method, shows promising applications for residual stress detection in oil and gas [...] Read more.
The residual stress significantly affects the operational safety of oil and gas pipelines. Traditional ultrasonic stress measurement methods require pipeline surface pretreatment, which reduces detection efficiency. EMAT, as a non-contact measurement method, shows promising applications for residual stress detection in oil and gas pipelines. Therefore, based on field conditions for residual stress detection in oil and gas pipelines, this study prepared X80 pipeline steel specimens with epoxy resin coatings of 0.58 mm, 1 mm, 1.58 mm, and 1.9 mm thickness to verify the influence of coating thickness on the stress measurement accuracy of EMAT. Additionally, X80 pipeline steel specimens with varying surface roughness were prepared to study the impact of surface roughness on the residual stress measurement. The results indicate that within the range of coating thickness variations, the residual stress measurement error falls in the range of 50 MPa, while the change of residual stress caused by surface roughness is less than 30 MPa. This validates the feasibility and accuracy of the EMAT method for residual stress measurement in in-service pipelines without the need for surface treatment. Full article
(This article belongs to the Special Issue Evaluation of Fatigue and Creep-Fatigue Damage of Steel)
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7 pages, 1928 KiB  
Communication
A Modification of the Ostergren Model for Thermomechanical Fatigue Life Prediction of Die-Casting Die Steel
by Pengpeng Zuo, Xijuan He, Jie Ji and Xiaochun Wu
Materials 2024, 17(23), 5744; https://doi.org/10.3390/ma17235744 - 24 Nov 2024
Viewed by 289
Abstract
The Ostergren model is simple in form and widely used in engineering practice, also serving as the modeling basis of both the damage differentiation and crack propagation models. However, the shortcomings of the Ostergren model are that the modeling process is affected by [...] Read more.
The Ostergren model is simple in form and widely used in engineering practice, also serving as the modeling basis of both the damage differentiation and crack propagation models. However, the shortcomings of the Ostergren model are that the modeling process is affected by thermomechanical fatigue (TMF) test parameters. To establish a TMF life normalized model, a modified Ostergren model based on hysteresis energy damage and TMF data for H13 steel was proposed. The model was successfully applied to TMF life prediction for 4Cr5Mo2V steel. The band of predicted life and test life is basically within the factor of 1.5. In summary, the modified Ostergren model is suitable for the TMF life prediction of Cr-Mo-V-type die-casting die steel. Full article
(This article belongs to the Special Issue Evaluation of Fatigue and Creep-Fatigue Damage of Steel)
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16 pages, 16092 KiB  
Article
Effect of Constant Cyclic Stress Coupling on the Fatigue Behavior of 304LN Stainless Steel
by Huanchun Wu, Huiqiang Liu, Chaoliang Xu, Wenqing Jia, Qiwei Quan, Jian Yin, Yuanfei Li, Xiao Jin, Wangjie Qian, Haitao Dong and Xiangbing Liu
Materials 2024, 17(21), 5220; https://doi.org/10.3390/ma17215220 - 26 Oct 2024
Viewed by 521
Abstract
The stress state of the primary circuit main pipeline is very complex mixed constant stress and periodic cyclic stress during the operation of nuclear power plants, which often affects the failure behavior of the stainless steel (SS) pipe. The fatigue behavior of 304LN [...] Read more.
The stress state of the primary circuit main pipeline is very complex mixed constant stress and periodic cyclic stress during the operation of nuclear power plants, which often affects the failure behavior of the stainless steel (SS) pipe. The fatigue behavior of 304LN SS under mixed constant stress and cyclic stress was investigated, and it was found that the coupling effect of constant stress and cyclic stress has a significant collaborative acceleration on the fatigue behavior. The research results showed that the cracks in the 304LN SS did not propagate even after 78 days under both constant load conditions of 5 KN and 7.5 KN, while the crack growth rate (CGR) of the specimen increased by about an order of magnitude when coupled with a cyclic fatigue load. The fatigue life of 304LN SS was the longest under 200 °C high-temperature water, and its life was roughly the same under 250 °C and 300 °C water. In a 300 °C high-temperature water environment, the fatigue life under the coupling of constant stress and cyclic fatigue stress is significantly lower than that under symmetric cyclic stress alone. There is a synergistic acceleration effect on the fatigue life of 304LN SS when constant stress is coupled with periodic cyclic stress, which is attributed to the combined effect of a corrosion environment and mechanical factors. Full article
(This article belongs to the Special Issue Evaluation of Fatigue and Creep-Fatigue Damage of Steel)
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14 pages, 6142 KiB  
Article
Prediction of Residual Life of In-Service P91 Steel Joints Based on Fracture Behavior
by Kai Yan, Yongjiang Cai, Denghui Wang, Shichao Zhang, Shuang Yi, Fulai Yang and Zheng Zhang
Materials 2024, 17(12), 2789; https://doi.org/10.3390/ma17122789 - 7 Jun 2024
Viewed by 602
Abstract
P91 steel and P91 steel joints experience performance degradation after serving for 30,000 h in working conditions. To clarify the damage and failure behavior and remaining life of the joints during subsequent service, further creep testing was conducted on the welded joints of [...] Read more.
P91 steel and P91 steel joints experience performance degradation after serving for 30,000 h in working conditions. To clarify the damage and failure behavior and remaining life of the joints during subsequent service, further creep testing was conducted on the welded joints of P91 steel that had been in service for 30,000 h at three temperatures: 550 °C, 575 °C, and 600 °C. The fracture surface and the cross-section damage behavior were characterized by SEM and EBSD methods. The results show that there are two types of fracture modes in the joints at different temperatures: ductile cracking occurring at the BM, and type IV cracking occurring in the FGHAZ. The threshold stress for fracture mode transition decreases with an increase in working temperature. Type IV cracking near the HAZ is the main reason for the premature failure of joints during service. And based on the fracture mode, the dual-constant L-M method was proposed to predict the strength of in-service joint materials. The testing data are discussed and classified based on the fracture mode in this method, which has high accuracy and can prevent the premature failure of joints. Full article
(This article belongs to the Special Issue Evaluation of Fatigue and Creep-Fatigue Damage of Steel)
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