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Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints
This paper investigated the effect of repair welding on the microstructure, mechanical properties, and high cycle fatigue properties of S355J2 steel T-joints in orthotropic bridge decks. The test results found that the increase in grain size of the coarse, heat-affected zone decreased the hardness o...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10224267/ https://www.ncbi.nlm.nih.gov/pubmed/37241308 http://dx.doi.org/10.3390/ma16103682 |
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author | Zhao, Peng Yu, Banglong Wang, Ping Liu, Yong Song, Xiaoguo |
author_facet | Zhao, Peng Yu, Banglong Wang, Ping Liu, Yong Song, Xiaoguo |
author_sort | Zhao, Peng |
collection | PubMed |
description | This paper investigated the effect of repair welding on the microstructure, mechanical properties, and high cycle fatigue properties of S355J2 steel T-joints in orthotropic bridge decks. The test results found that the increase in grain size of the coarse, heat-affected zone decreased the hardness of the welded joint by about 30 HV. The tensile strength of the repair-welded joints was reduced by 20 MPa compared to the welded joints. For the high cycle fatigue behavior, the fatigue life of repair-welded joints is lower than that of the welded joints under the same dynamic load. The fracture positions of toe repair-welded joints were all at the weld root, while the fracture positions of the deck repair-welded joints were at the weld toe and weld root, with the same proportion. The fatigue life of toe repair-welded joints is reduced more than that of deck repair-welded joints. The traction structural stress method was used to analyze fatigue data of the welded and repair-welded joints, and the influence of angular misalignment on was considered. The fatigue data with and without AM are all within the ±95% confidence interval of the master S-N curve. |
format | Online Article Text |
id | pubmed-10224267 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-102242672023-05-28 Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints Zhao, Peng Yu, Banglong Wang, Ping Liu, Yong Song, Xiaoguo Materials (Basel) Article This paper investigated the effect of repair welding on the microstructure, mechanical properties, and high cycle fatigue properties of S355J2 steel T-joints in orthotropic bridge decks. The test results found that the increase in grain size of the coarse, heat-affected zone decreased the hardness of the welded joint by about 30 HV. The tensile strength of the repair-welded joints was reduced by 20 MPa compared to the welded joints. For the high cycle fatigue behavior, the fatigue life of repair-welded joints is lower than that of the welded joints under the same dynamic load. The fracture positions of toe repair-welded joints were all at the weld root, while the fracture positions of the deck repair-welded joints were at the weld toe and weld root, with the same proportion. The fatigue life of toe repair-welded joints is reduced more than that of deck repair-welded joints. The traction structural stress method was used to analyze fatigue data of the welded and repair-welded joints, and the influence of angular misalignment on was considered. The fatigue data with and without AM are all within the ±95% confidence interval of the master S-N curve. MDPI 2023-05-11 /pmc/articles/PMC10224267/ /pubmed/37241308 http://dx.doi.org/10.3390/ma16103682 Text en © 2023 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 Zhao, Peng Yu, Banglong Wang, Ping Liu, Yong Song, Xiaoguo Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints |
title | Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints |
title_full | Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints |
title_fullStr | Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints |
title_full_unstemmed | Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints |
title_short | Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints |
title_sort | influence of repair welding on the fatigue behavior of s355j2 t-joints |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10224267/ https://www.ncbi.nlm.nih.gov/pubmed/37241308 http://dx.doi.org/10.3390/ma16103682 |
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