Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime

Effect of microstructure on the crack initiation and early propagation mechanism in the very high cycle fatigue (VHCF) regime was studied in 316L stainless steel (316L SS) by atomic force microscope (AFM) and electron back scattered diffraction (EBSD). The results show that small fatigue cracks init...

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Autores principales: Hu, Yongtao, Chen, Yao, He, Chao, Liu, Yongjie, Wang, Qingyuan, Wang, Chong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7663227/
https://www.ncbi.nlm.nih.gov/pubmed/33126746
http://dx.doi.org/10.3390/ma13214820
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author Hu, Yongtao
Chen, Yao
He, Chao
Liu, Yongjie
Wang, Qingyuan
Wang, Chong
author_facet Hu, Yongtao
Chen, Yao
He, Chao
Liu, Yongjie
Wang, Qingyuan
Wang, Chong
author_sort Hu, Yongtao
collection PubMed
description Effect of microstructure on the crack initiation and early propagation mechanism in the very high cycle fatigue (VHCF) regime was studied in 316L stainless steel (316L SS) by atomic force microscope (AFM) and electron back scattered diffraction (EBSD). The results show that small fatigue cracks initiate from the slip band near the grain boundaries (GBs) or the twin boundaries (TBs). Early crack propagation along or cross the slip band is strongly influenced by the local microstructure such as grain size, orientation, and boundary. Besides, the gathered slip bands (SBs) are presented side by side with the damage grains of the run-out specimen. Finally, it is found that dislocations can either pass through the TBs, or be arrested at the TBs.
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spelling pubmed-76632272020-11-14 Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime Hu, Yongtao Chen, Yao He, Chao Liu, Yongjie Wang, Qingyuan Wang, Chong Materials (Basel) Article Effect of microstructure on the crack initiation and early propagation mechanism in the very high cycle fatigue (VHCF) regime was studied in 316L stainless steel (316L SS) by atomic force microscope (AFM) and electron back scattered diffraction (EBSD). The results show that small fatigue cracks initiate from the slip band near the grain boundaries (GBs) or the twin boundaries (TBs). Early crack propagation along or cross the slip band is strongly influenced by the local microstructure such as grain size, orientation, and boundary. Besides, the gathered slip bands (SBs) are presented side by side with the damage grains of the run-out specimen. Finally, it is found that dislocations can either pass through the TBs, or be arrested at the TBs. MDPI 2020-10-28 /pmc/articles/PMC7663227/ /pubmed/33126746 http://dx.doi.org/10.3390/ma13214820 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hu, Yongtao
Chen, Yao
He, Chao
Liu, Yongjie
Wang, Qingyuan
Wang, Chong
Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime
title Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime
title_full Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime
title_fullStr Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime
title_full_unstemmed Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime
title_short Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime
title_sort bending fatigue behavior of 316l stainless steel up to very high cycle fatigue regime
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7663227/
https://www.ncbi.nlm.nih.gov/pubmed/33126746
http://dx.doi.org/10.3390/ma13214820
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