Effect of notch and stress ratio on Very High Cycle Fatigue characteristics of the carburized 17CrNi high-strength steel and life prediction

Abdelhak Nehila; Wei Li

doi:10.1016/j.prostr.2023.10.082

Effect of notch and stress ratio on Very High Cycle Fatigue characteristics of the carburized 17CrNi high-strength steel and life prediction

Abdelhak Nehila^*
, Wei Li

^*Corresponding author for this work

School of Mechanical Engineering

Algerian Space Agency

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

In order to investigate the notch effect on the structural characteristics of the carburized 17CrNi high-strength steel in the very high cycle fatigue (VHCF) loading, the axial tests with the stress ratio (R) of -1 were performed and the S-N characteristics were studied. The microscopic observation revealed that surface induced failure was the only failure mode. Further, the effect of the notch was investigated: Based on the small crack theory, the calculation of the fatigue notch factor (K_f) was performed and has shown that K_fis slightly less than the theoretical stress concentration factor (K_t). Then, K_fwas used to study both the notch effect and stress ratio effect on fatigue life. Finally, the life prediction model associated with R and K_fwas established and the calculation results are valid according to the good agreement with the experimental data.

Original language	English
Pages (from-to)	152-159
Number of pages	8
Journal	Procedia Structural Integrity
Volume	51
DOIs	https://doi.org/10.1016/j.prostr.2023.10.082
Publication status	Published - 2023
Event	6th International Conference on Structural Integrity and Durability, ICSID 2022 - Dubrovnik, Croatia Duration: 20 Sept 2022 → 23 Sept 2022

Keywords

Very high cycle fatigue
crack morphology
life prediction
notch factor
stress radio

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10.1016/j.prostr.2023.10.082

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@article{64d2d60c86194d77a8e31c126be69f08,

title = "Effect of notch and stress ratio on Very High Cycle Fatigue characteristics of the carburized 17CrNi high-strength steel and life prediction",

abstract = "In order to investigate the notch effect on the structural characteristics of the carburized 17CrNi high-strength steel in the very high cycle fatigue (VHCF) loading, the axial tests with the stress ratio (R) of -1 were performed and the S-N characteristics were studied. The microscopic observation revealed that surface induced failure was the only failure mode. Further, the effect of the notch was investigated: Based on the small crack theory, the calculation of the fatigue notch factor (Kf) was performed and has shown that Kfis slightly less than the theoretical stress concentration factor (Kt). Then, Kfwas used to study both the notch effect and stress ratio effect on fatigue life. Finally, the life prediction model associated with R and Kfwas established and the calculation results are valid according to the good agreement with the experimental data.",

keywords = "Very high cycle fatigue, crack morphology, life prediction, notch factor, stress radio",

author = "Abdelhak Nehila and Wei Li",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.. All rights reserved.; 6th International Conference on Structural Integrity and Durability, ICSID 2022 ; Conference date: 20-09-2022 Through 23-09-2022",

year = "2023",

doi = "10.1016/j.prostr.2023.10.082",

language = "English",

volume = "51",

pages = "152--159",

journal = "Procedia Structural Integrity",

issn = "2452-3216",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of notch and stress ratio on Very High Cycle Fatigue characteristics of the carburized 17CrNi high-strength steel and life prediction

AU - Nehila, Abdelhak

AU - Li, Wei

PY - 2023

Y1 - 2023

N2 - In order to investigate the notch effect on the structural characteristics of the carburized 17CrNi high-strength steel in the very high cycle fatigue (VHCF) loading, the axial tests with the stress ratio (R) of -1 were performed and the S-N characteristics were studied. The microscopic observation revealed that surface induced failure was the only failure mode. Further, the effect of the notch was investigated: Based on the small crack theory, the calculation of the fatigue notch factor (Kf) was performed and has shown that Kfis slightly less than the theoretical stress concentration factor (Kt). Then, Kfwas used to study both the notch effect and stress ratio effect on fatigue life. Finally, the life prediction model associated with R and Kfwas established and the calculation results are valid according to the good agreement with the experimental data.

AB - In order to investigate the notch effect on the structural characteristics of the carburized 17CrNi high-strength steel in the very high cycle fatigue (VHCF) loading, the axial tests with the stress ratio (R) of -1 were performed and the S-N characteristics were studied. The microscopic observation revealed that surface induced failure was the only failure mode. Further, the effect of the notch was investigated: Based on the small crack theory, the calculation of the fatigue notch factor (Kf) was performed and has shown that Kfis slightly less than the theoretical stress concentration factor (Kt). Then, Kfwas used to study both the notch effect and stress ratio effect on fatigue life. Finally, the life prediction model associated with R and Kfwas established and the calculation results are valid according to the good agreement with the experimental data.

KW - Very high cycle fatigue

KW - crack morphology

KW - life prediction

KW - notch factor

KW - stress radio

UR - https://www.scopus.com/pages/publications/85182378673

U2 - 10.1016/j.prostr.2023.10.082

DO - 10.1016/j.prostr.2023.10.082

M3 - Conference article

AN - SCOPUS:85182378673

SN - 2452-3216

VL - 51

SP - 152

EP - 159

JO - Procedia Structural Integrity

JF - Procedia Structural Integrity

T2 - 6th International Conference on Structural Integrity and Durability, ICSID 2022

Y2 - 20 September 2022 through 23 September 2022

ER -

Effect of notch and stress ratio on Very High Cycle Fatigue characteristics of the carburized 17CrNi high-strength steel and life prediction

Abstract

Keywords

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