Relevant bibliographies by topics / Environment-assisted fatigue

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Academic literature on the topic 'Environment-assisted fatigue'

Author: Grafiati
Published: 11 March 2023

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Journal articles on the topic "Environment-assisted fatigue"

1

Wu, X. J., and W. Wallace. "On low-temperature environment-assisted fatigue crack propagation." Metallurgical and Materials Transactions A 25, no. 3 (1994): 658–59. http://dx.doi.org/10.1007/bf02651611.

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2

Sandviknes, J. S. S., N. D. Adasooriya, D. Pavlou, and T. Hemmingsen. "Environment-assisted fatigue of steel bridges: A conceptual framework for life assessment." IOP Conference Series: Materials Science and Engineering 1201, no. 1 (2021): 012045. http://dx.doi.org/10.1088/1757-899x/1201/1/012045.

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Abstract This paper presents a framework based on a recently proposed fatigue strength curve of corroded steel to assess the life of an existing steel bridge exposed to environment-assisted fatigue. Environment-assisted cracking (EAC) and how it affects the structural integrity of steel bridges are introduced by the framework. Determination of both corroded and uncorroded details in a corrosive environment are also included in this framework. To conform the applicability and significance, a fatigue life of a railway bridge was assessed by methods given in the framework. The obtained fatigue lives were compared. The difference of the estimated fatigue lives emphasizes the importance of having this framework to consider the interaction of corrosion and fatigue mechanisms.
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3

Zelizko, V., A. Grossmuller, and M. V. Swain. "Environment Assisted Fatigue Crack Growth Behaviour of Mg-PSZ." Materials Science Forum 34-36 (January 1991): 201–5. http://dx.doi.org/10.4028/www.scientific.net/msf.34-36.201.

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4

Shen, R., Y. B. He, and M. Cao. "Research on the Environment Assisted Fatigue Based on Flaw Tolerance Method." Procedia Engineering 130 (2015): 1580–91. http://dx.doi.org/10.1016/j.proeng.2015.12.329.

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5

Gu, Kyoung Hee, Ki Sik Lee, Gum Hwa Lee, and Ki Woo Nam. "Evaluation of Fatigue Life of Ultra-High-Strength Steel under Stress Corrosion Environment." Applied Mechanics and Materials 907 (June 22, 2022): 1–7. http://dx.doi.org/10.4028/p-s303xf.

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Ultra-high-strength steel (UHSS) structures are exposed to corrosive environments during service, and hydrogen-assisted cracking (HAC) may occur owing to stress corrosion cracking and hydrogen embrittlement. In this study, the HAC threshold stress intensity factor and fatigue life of UHSS steel were evaluated by applying stress in a corrosive environment to prevent structural fracture. For specimen with semicircular slits by electric discharge machining, fatigue limit was obtained by static fatigue test under corrosive environment. The fatigue limit of the crack specimen was evaluated by the fatigue limit of the experiment and HAC threshold stress intensity factor, and comparative evaluation was performed. On the surface of cracks, grain boundaries were embrittled by corrosion, and grains were clearly observed. Meanwhile, cracks in the surface direction propagated slightly, unlike cracks in the depth direction. The static fatigue limit of UHSS (SKD11:HV670) was determined to be 400 MPa, and the fatigue limit of the crack specimen could be evaluated. The experimental results agreed well with the evaluation results.
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6

Bruchhausen, Matthias, Gintautas Dundulis, Alec McLennan, et al. "Characterization of Austenitic Stainless Steels with Regard to Environmentally Assisted Fatigue in Simulated Light Water Reactor Conditions." Metals 11, no. 2 (2021): 307. http://dx.doi.org/10.3390/met11020307.

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A substantial amount of research effort has been applied to the field of environmentally assisted fatigue (EAF) due to the requirement to account for the EAF behaviour of metals for existing and new build nuclear power plants. We present the results of the European project INcreasing Safety in NPPs by Covering Gaps in Environmental Fatigue Assessment (INCEFA-PLUS), during which the sensitivities of strain range, environment, surface roughness, mean strain and hold times, as well as their interactions on the fatigue life of austenitic steels has been characterized. The project included a test campaign, during which more than 250 fatigue tests were performed. The tests did not reveal a significant effect of mean strain or hold time on fatigue life. An empirical model describing the fatigue life as a function of strain rate, environment and surface roughness is developed. There is evidence for statistically significant interaction effects between surface roughness and the environment, as well as between surface roughness and strain range. However, their impact on fatigue life is so small that they are not practically relevant and can in most cases be neglected. Reducing the environmental impact on fatigue life by modifying the temperature or strain rate leads to an increase of the fatigue life in agreement with predictions based on NUREG/CR-6909. A limited sub-programme on the sensitivity of hold times at elevated temperature at zero force conditions and at elevated temperature did not show the beneficial effect on fatigue life found in another study.
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7

Chen, Xingyang, Linlin Ma, Haoping Xie, Fengting Zhao, Yufeng Ye, and Lin Zhang. "Effects of external hydrogen on hydrogen-assisted crack initiation in type 304 stainless steel." Anti-Corrosion Methods and Materials 67, no. 3 (2020): 331–35. http://dx.doi.org/10.1108/acmm-02-2020-2258.

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Purpose The purpose of this paper is to present a crack initiation mechanism of the external hydrogen effect on type 304 stainless steel, as well as on fatigue crack propagation in the presence of hydrogen gas. Design/methodology/approach The effects of external hydrogen on hydrogen-assisted crack initiation in type 304 stainless steel were discussed by performing fatigue crack growth rate and fatigue life tests in 5 MPa argon and hydrogen. Findings Hydrogen can reduce the incubation period of fatigue crack initiation of smooth fatigue specimens and greatly promote the fatigue crack growth rate during the subsequent fatigue cycle. During the fatigue cycle, hydrogen invades into matrix through the intrusion and extrusion and segregates at the boundaries of α′ martensite and austenite. As the fatigue cycle increased, hydrogen-induced cracks would initiate along the slip bands. The crack initiation progress would greatly accelerate in the presence of hydrogen. Originality/value To the best of the authors’ knowledge, this paper is an original work carried out by the authors on the hydrogen environment embrittlement of type 304 stainless steel. The effects of external hydrogen and argon were compared to provide understanding on the hydrogen-assisted crack initiation behaviors during cycle loading.
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8

FUKUTA, Yuichi, Hiroshi KANASAKI, Seiji ASADA, and Toshiya SARUWATARI. "OS0803 Refinement of Strain Rate that Shows No Environment Assisted Fatigue for Austenitic Stainless Steels in PWR Environment." Proceedings of the Materials and Mechanics Conference 2012 (2012): _OS0803–1_—_OS0803–3_. http://dx.doi.org/10.1299/jsmemm.2012._os0803-1_.

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9

Octavia, Johanna Renny, Peter Feys, and Karin Coninx. "Development of Activity-Related Muscle Fatigue during Robot-Mediated Upper Limb Rehabilitation Training in Persons with Multiple Sclerosis: A Pilot Trial." Multiple Sclerosis International 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/650431.

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Robot-assisted rehabilitation facilitates high-intensity training of the impaired upper limb in neurological rehabilitation. It has been clinically observed that persons with Multiple Sclerosis (MS) have difficulties in sustaining the training intensity during a session due to the development of activity-related muscle fatigue. An experimental observational pilot study was conducted to examine whether or not the muscle fatigue develops in MS patients during one session of robot-assisted training within a virtual learning environment. Six MS patients with upper limb impairment (motricity index ranging from 50 to 91/100) and six healthy persons completed five training bouts of three minutes each performing lifting tasks, while EMG signals of anterior deltoid and lower trapezius muscles were measured and their subjective perceptions on muscle fatigue were registered. Decreased performance and higher subjective fatigue perception were present in the MS group. Increased mean EMG amplitudes and subjective perception levels on muscle fatigue were observed in both groups. Muscle fatigue development during 15′ training has been demonstrated in the arm of MS patients, which influences the sustainability of training intensity in MS patients. To optimize the training performance, adaptivity based on the detection of MS patient’s muscle fatigue could be provided by means of training program adjustment.
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10

Poulain, Thibault, Laurent de Baglion, Jose Mendez, and Gilbert Hénaff. "Influence of Strain Rate and Waveshape on Environmentally-Assisted Cracking during Low-Cycle Fatigue of a 304L Austenitic Stainless Steel in a PWR Water Environment." Metals 9, no. 2 (2019): 197. http://dx.doi.org/10.3390/met9020197.

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In this paper, the low cycle fatigue resistance of a 304L austenitic stainless steel in a simulated pressurized water reactor (PWR) primary water environment has been investigated by paying a special attention to the interplay between environmentally-assisted cracking mechanisms, strain rate, and loading waveshape. More precisely, one of the prime interests of this research work is related to the consideration of complex waveshape signals that are more representative of solicitations encountered by real components. A detailed analysis of stress-strain relation, surface damage, and crack growth provides a preliminary ranking of the severity of complex, variable strain rate signals with respect to triangular, constant strain-rate signals associated with environmental effects in air or in PWR water. Furthermore, as the fatigue lives in PWR water environment are mainly controlled by crack propagation, the crack growth rates derived from striation spacing measurement and estimated from interrupted tests have been carefully examined and analyzed using the strain intensity factor range ΔKε. It is confirmed that the most severe signal with regards to fatigue life also induces the highest crack growth enhancement. Additionally two characteristic parameters, namely a threshold strain εth* and a time T*, corresponding to the duration of the effective exposure of the open cracks to PWR environment have been introduced. It is shown that the T* parameter properly accounts for the differences in environmentally-assisted growth rates as a function of waveshape.
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