Investigating the Advantages of Ultrasonic-assisted Welding Technique Applied in Underwater Wet Welding by in-situ X-ray Imaging Method

In this study, the effects of ultrasonic on melt pool dynamic, microstructure, and properties of underwater wet flux-cored arc welding (FCAW) joints were investigated. Ultrasonic vibration enhanced melt flow and weld pool oscillation. Grain fragmentation caused by cavitation changed microstructure m...

Descripción completa

Detalles Bibliográficos
Autores principales: Chen, Hao, Guo, Ning, Xu, Kexin, Liu, Cheng, Wang, Guodong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7142934/
https://www.ncbi.nlm.nih.gov/pubmed/32245272
http://dx.doi.org/10.3390/ma13061442
_version_ 1783519496837791744
author Chen, Hao
Guo, Ning
Xu, Kexin
Liu, Cheng
Wang, Guodong
author_facet Chen, Hao
Guo, Ning
Xu, Kexin
Liu, Cheng
Wang, Guodong
author_sort Chen, Hao
collection PubMed
description In this study, the effects of ultrasonic on melt pool dynamic, microstructure, and properties of underwater wet flux-cored arc welding (FCAW) joints were investigated. Ultrasonic vibration enhanced melt flow and weld pool oscillation. Grain fragmentation caused by cavitation changed microstructure morphology and decreased microstructure size. The proportion of polygonal ferrite (PF) reduced or even disappeared. The width of grain boundary ferrite (GBF) decreased from 34 to 10 μm, and the hardness increased from 204 to 276 HV. The tensile strength of the joint increased from 545 to 610 MPa, and the impact toughness increased from 65 to 71 J/mm(2) due to the microstructure refinement at the optimum ultrasonic power.
format Online
Article
Text
id pubmed-7142934
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-71429342020-04-14 Investigating the Advantages of Ultrasonic-assisted Welding Technique Applied in Underwater Wet Welding by in-situ X-ray Imaging Method Chen, Hao Guo, Ning Xu, Kexin Liu, Cheng Wang, Guodong Materials (Basel) Article In this study, the effects of ultrasonic on melt pool dynamic, microstructure, and properties of underwater wet flux-cored arc welding (FCAW) joints were investigated. Ultrasonic vibration enhanced melt flow and weld pool oscillation. Grain fragmentation caused by cavitation changed microstructure morphology and decreased microstructure size. The proportion of polygonal ferrite (PF) reduced or even disappeared. The width of grain boundary ferrite (GBF) decreased from 34 to 10 μm, and the hardness increased from 204 to 276 HV. The tensile strength of the joint increased from 545 to 610 MPa, and the impact toughness increased from 65 to 71 J/mm(2) due to the microstructure refinement at the optimum ultrasonic power. MDPI 2020-03-21 /pmc/articles/PMC7142934/ /pubmed/32245272 http://dx.doi.org/10.3390/ma13061442 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
Chen, Hao
Guo, Ning
Xu, Kexin
Liu, Cheng
Wang, Guodong
Investigating the Advantages of Ultrasonic-assisted Welding Technique Applied in Underwater Wet Welding by in-situ X-ray Imaging Method
title Investigating the Advantages of Ultrasonic-assisted Welding Technique Applied in Underwater Wet Welding by in-situ X-ray Imaging Method
title_full Investigating the Advantages of Ultrasonic-assisted Welding Technique Applied in Underwater Wet Welding by in-situ X-ray Imaging Method
title_fullStr Investigating the Advantages of Ultrasonic-assisted Welding Technique Applied in Underwater Wet Welding by in-situ X-ray Imaging Method
title_full_unstemmed Investigating the Advantages of Ultrasonic-assisted Welding Technique Applied in Underwater Wet Welding by in-situ X-ray Imaging Method
title_short Investigating the Advantages of Ultrasonic-assisted Welding Technique Applied in Underwater Wet Welding by in-situ X-ray Imaging Method
title_sort investigating the advantages of ultrasonic-assisted welding technique applied in underwater wet welding by in-situ x-ray imaging method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7142934/
https://www.ncbi.nlm.nih.gov/pubmed/32245272
http://dx.doi.org/10.3390/ma13061442
work_keys_str_mv AT chenhao investigatingtheadvantagesofultrasonicassistedweldingtechniqueappliedinunderwaterwetweldingbyinsituxrayimagingmethod
AT guoning investigatingtheadvantagesofultrasonicassistedweldingtechniqueappliedinunderwaterwetweldingbyinsituxrayimagingmethod
AT xukexin investigatingtheadvantagesofultrasonicassistedweldingtechniqueappliedinunderwaterwetweldingbyinsituxrayimagingmethod
AT liucheng investigatingtheadvantagesofultrasonicassistedweldingtechniqueappliedinunderwaterwetweldingbyinsituxrayimagingmethod
AT wangguodong investigatingtheadvantagesofultrasonicassistedweldingtechniqueappliedinunderwaterwetweldingbyinsituxrayimagingmethod

Ejemplares similares