Crack Initiation Mechanism and Life Prediction of Ti60 Titanium Alloy Considering Stress Ratios Effect in Very High Cycle Fatigue Regime

Ultrasonic fatigue tests were performed on Ti60 titanium alloy up to a very high cycle fatigue (VHCF) regime at various stress ratios to investigate the characteristics. The S-N curves showed continuous declining trends with fatigue limits of 400, 144 and 130 MPa at 10(9) cycles corresponding to str...

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Autores principales: He, Ruixiang, Peng, Haotian, Liu, Fulin, Khan, Muhammad Kashif, Chen, Yao, He, Chao, Wang, Chong, Wang, Qingyuan, Liu, Yongjie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9027182/
https://www.ncbi.nlm.nih.gov/pubmed/35454493
http://dx.doi.org/10.3390/ma15082800
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author He, Ruixiang
Peng, Haotian
Liu, Fulin
Khan, Muhammad Kashif
Chen, Yao
He, Chao
Wang, Chong
Wang, Qingyuan
Liu, Yongjie
author_facet He, Ruixiang
Peng, Haotian
Liu, Fulin
Khan, Muhammad Kashif
Chen, Yao
He, Chao
Wang, Chong
Wang, Qingyuan
Liu, Yongjie
author_sort He, Ruixiang
collection PubMed
description Ultrasonic fatigue tests were performed on Ti60 titanium alloy up to a very high cycle fatigue (VHCF) regime at various stress ratios to investigate the characteristics. The S-N curves showed continuous declining trends with fatigue limits of 400, 144 and 130 MPa at 10(9) cycles corresponding to stress ratios of R = −1, 0.1 and 0.3, respectively. Fatigue cracks found to be initiated from the subsurface of the specimens in the VHCF regime, especially at high stress ratios. Two modified fatigue life prediction models based on fatigue crack initiation mechanisms for Ti60 titanium alloy in the VHCF regime were developed which showed good agreement with the experimental data.
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spelling pubmed-90271822022-04-23 Crack Initiation Mechanism and Life Prediction of Ti60 Titanium Alloy Considering Stress Ratios Effect in Very High Cycle Fatigue Regime He, Ruixiang Peng, Haotian Liu, Fulin Khan, Muhammad Kashif Chen, Yao He, Chao Wang, Chong Wang, Qingyuan Liu, Yongjie Materials (Basel) Article Ultrasonic fatigue tests were performed on Ti60 titanium alloy up to a very high cycle fatigue (VHCF) regime at various stress ratios to investigate the characteristics. The S-N curves showed continuous declining trends with fatigue limits of 400, 144 and 130 MPa at 10(9) cycles corresponding to stress ratios of R = −1, 0.1 and 0.3, respectively. Fatigue cracks found to be initiated from the subsurface of the specimens in the VHCF regime, especially at high stress ratios. Two modified fatigue life prediction models based on fatigue crack initiation mechanisms for Ti60 titanium alloy in the VHCF regime were developed which showed good agreement with the experimental data. MDPI 2022-04-11 /pmc/articles/PMC9027182/ /pubmed/35454493 http://dx.doi.org/10.3390/ma15082800 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
He, Ruixiang
Peng, Haotian
Liu, Fulin
Khan, Muhammad Kashif
Chen, Yao
He, Chao
Wang, Chong
Wang, Qingyuan
Liu, Yongjie
Crack Initiation Mechanism and Life Prediction of Ti60 Titanium Alloy Considering Stress Ratios Effect in Very High Cycle Fatigue Regime
title Crack Initiation Mechanism and Life Prediction of Ti60 Titanium Alloy Considering Stress Ratios Effect in Very High Cycle Fatigue Regime
title_full Crack Initiation Mechanism and Life Prediction of Ti60 Titanium Alloy Considering Stress Ratios Effect in Very High Cycle Fatigue Regime
title_fullStr Crack Initiation Mechanism and Life Prediction of Ti60 Titanium Alloy Considering Stress Ratios Effect in Very High Cycle Fatigue Regime
title_full_unstemmed Crack Initiation Mechanism and Life Prediction of Ti60 Titanium Alloy Considering Stress Ratios Effect in Very High Cycle Fatigue Regime
title_short Crack Initiation Mechanism and Life Prediction of Ti60 Titanium Alloy Considering Stress Ratios Effect in Very High Cycle Fatigue Regime
title_sort crack initiation mechanism and life prediction of ti60 titanium alloy considering stress ratios effect in very high cycle fatigue regime
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9027182/
https://www.ncbi.nlm.nih.gov/pubmed/35454493
http://dx.doi.org/10.3390/ma15082800
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