Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints

In this paper, the microstructure and impact toughness of a S32101 duplex stainless steel underwater local-dry keyhole tungsten inert gas welded joint were studied. The impact toughness value of the underwater weld metal reached 78% of the onshore weld metal, which is in accordance with the underwat...

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Autores principales: Cui, Shuwan, Xian, Zhiyong, Shi, Yonghua, Liao, Baoyi, Zhu, Tao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567175/
https://www.ncbi.nlm.nih.gov/pubmed/31137474
http://dx.doi.org/10.3390/ma12101638
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author Cui, Shuwan
Xian, Zhiyong
Shi, Yonghua
Liao, Baoyi
Zhu, Tao
author_facet Cui, Shuwan
Xian, Zhiyong
Shi, Yonghua
Liao, Baoyi
Zhu, Tao
author_sort Cui, Shuwan
collection PubMed
description In this paper, the microstructure and impact toughness of a S32101 duplex stainless steel underwater local-dry keyhole tungsten inert gas welded joint were studied. The impact toughness value of the underwater weld metal reached 78% of the onshore weld metal, which is in accordance with the underwater welding standards. The proportion of austenite in the underwater weld metal was 0.9% lower than that of the onshore weld metal. The proportion of the Σ3 coincidence site lattice boundaries and random phase boundaries in the underwater weld metal, which significantly influence the impact toughness of the weld metal, were smaller than that of the onshore weld metal.
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spelling pubmed-65671752019-06-17 Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints Cui, Shuwan Xian, Zhiyong Shi, Yonghua Liao, Baoyi Zhu, Tao Materials (Basel) Article In this paper, the microstructure and impact toughness of a S32101 duplex stainless steel underwater local-dry keyhole tungsten inert gas welded joint were studied. The impact toughness value of the underwater weld metal reached 78% of the onshore weld metal, which is in accordance with the underwater welding standards. The proportion of austenite in the underwater weld metal was 0.9% lower than that of the onshore weld metal. The proportion of the Σ3 coincidence site lattice boundaries and random phase boundaries in the underwater weld metal, which significantly influence the impact toughness of the weld metal, were smaller than that of the onshore weld metal. MDPI 2019-05-20 /pmc/articles/PMC6567175/ /pubmed/31137474 http://dx.doi.org/10.3390/ma12101638 Text en © 2019 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
Cui, Shuwan
Xian, Zhiyong
Shi, Yonghua
Liao, Baoyi
Zhu, Tao
Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints
title Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints
title_full Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints
title_fullStr Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints
title_full_unstemmed Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints
title_short Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints
title_sort microstructure and impact toughness of local-dry keyhole tungsten inert gas welded joints
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567175/
https://www.ncbi.nlm.nih.gov/pubmed/31137474
http://dx.doi.org/10.3390/ma12101638
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