Effect of Niobium Content on the Microstructure and Mechanical Properties of Simulated Coarse-Grained Heat-Affected Zone (CGHAZ) of High-Strength Low-Alloy (HSLA) Steels

The effect of Nb-content and heat input rate on the mechanical properties and microstructure of simulated coarse-grained heat-affected zone (CGHAZ) of high-strength low-alloy steel (HSLA) was investigated. While using a low heat input (20 kJ/cm), the toughness of simulated CGHAZ was improved by incr...

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Autores principales: Yu, Hongwei, Wu, Kaiming, Dong, Baoqi, Yu, Liling, Liu, Jingxi, Liu, Zicheng, Xiao, Daheng, Jing, Xing, Liu, Hankun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9104738/
https://www.ncbi.nlm.nih.gov/pubmed/35591649
http://dx.doi.org/10.3390/ma15093318
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author Yu, Hongwei
Wu, Kaiming
Dong, Baoqi
Yu, Liling
Liu, Jingxi
Liu, Zicheng
Xiao, Daheng
Jing, Xing
Liu, Hankun
author_facet Yu, Hongwei
Wu, Kaiming
Dong, Baoqi
Yu, Liling
Liu, Jingxi
Liu, Zicheng
Xiao, Daheng
Jing, Xing
Liu, Hankun
author_sort Yu, Hongwei
collection PubMed
description The effect of Nb-content and heat input rate on the mechanical properties and microstructure of simulated coarse-grained heat-affected zone (CGHAZ) of high-strength low-alloy steel (HSLA) was investigated. While using a low heat input (20 kJ/cm), the toughness of simulated CGHAZ was improved by increasing the Nb-content. The maximum toughness was obtained when the Nb-content was 0.110 wt.% and the heat input was 20 kJ/cm. The samples made at this condition had fine martensite/austenite (M/A-constituent), acicular ferrite and refined austenite grains. As the heat input was increased to 200 kJ/cm, the toughness of simulated CGHAZ was significantly decreased irrespective of the Nb-content because of the formation of coarse austenite grains, low angle grain boundaries, and massive M/A-constituents.
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spelling pubmed-91047382022-05-14 Effect of Niobium Content on the Microstructure and Mechanical Properties of Simulated Coarse-Grained Heat-Affected Zone (CGHAZ) of High-Strength Low-Alloy (HSLA) Steels Yu, Hongwei Wu, Kaiming Dong, Baoqi Yu, Liling Liu, Jingxi Liu, Zicheng Xiao, Daheng Jing, Xing Liu, Hankun Materials (Basel) Article The effect of Nb-content and heat input rate on the mechanical properties and microstructure of simulated coarse-grained heat-affected zone (CGHAZ) of high-strength low-alloy steel (HSLA) was investigated. While using a low heat input (20 kJ/cm), the toughness of simulated CGHAZ was improved by increasing the Nb-content. The maximum toughness was obtained when the Nb-content was 0.110 wt.% and the heat input was 20 kJ/cm. The samples made at this condition had fine martensite/austenite (M/A-constituent), acicular ferrite and refined austenite grains. As the heat input was increased to 200 kJ/cm, the toughness of simulated CGHAZ was significantly decreased irrespective of the Nb-content because of the formation of coarse austenite grains, low angle grain boundaries, and massive M/A-constituents. MDPI 2022-05-05 /pmc/articles/PMC9104738/ /pubmed/35591649 http://dx.doi.org/10.3390/ma15093318 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
Yu, Hongwei
Wu, Kaiming
Dong, Baoqi
Yu, Liling
Liu, Jingxi
Liu, Zicheng
Xiao, Daheng
Jing, Xing
Liu, Hankun
Effect of Niobium Content on the Microstructure and Mechanical Properties of Simulated Coarse-Grained Heat-Affected Zone (CGHAZ) of High-Strength Low-Alloy (HSLA) Steels
title Effect of Niobium Content on the Microstructure and Mechanical Properties of Simulated Coarse-Grained Heat-Affected Zone (CGHAZ) of High-Strength Low-Alloy (HSLA) Steels
title_full Effect of Niobium Content on the Microstructure and Mechanical Properties of Simulated Coarse-Grained Heat-Affected Zone (CGHAZ) of High-Strength Low-Alloy (HSLA) Steels
title_fullStr Effect of Niobium Content on the Microstructure and Mechanical Properties of Simulated Coarse-Grained Heat-Affected Zone (CGHAZ) of High-Strength Low-Alloy (HSLA) Steels
title_full_unstemmed Effect of Niobium Content on the Microstructure and Mechanical Properties of Simulated Coarse-Grained Heat-Affected Zone (CGHAZ) of High-Strength Low-Alloy (HSLA) Steels
title_short Effect of Niobium Content on the Microstructure and Mechanical Properties of Simulated Coarse-Grained Heat-Affected Zone (CGHAZ) of High-Strength Low-Alloy (HSLA) Steels
title_sort effect of niobium content on the microstructure and mechanical properties of simulated coarse-grained heat-affected zone (cghaz) of high-strength low-alloy (hsla) steels
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9104738/
https://www.ncbi.nlm.nih.gov/pubmed/35591649
http://dx.doi.org/10.3390/ma15093318
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