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Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels

This article deals with the dissimilar joining of two different grade Cr-Mo steel (2.25Cr-1Mo: P22 and modified 9Cr-1Mo: P91) for power plant application. The dissimilar butt-welded joint was produced for conventional V groove design by using the gas tungsten arc welding (GTAW) process with the appl...

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Autores principales: Sauraw, Anupam, Sharma, Atul Kumar, Fydrych, Dariusz, Sirohi, Sachin, Gupta, Ankur, Świerczyńska, Aleksandra, Pandey, Chandan, Rogalski, Grzegorz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585238/
https://www.ncbi.nlm.nih.gov/pubmed/34772132
http://dx.doi.org/10.3390/ma14216591
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author Sauraw, Anupam
Sharma, Atul Kumar
Fydrych, Dariusz
Sirohi, Sachin
Gupta, Ankur
Świerczyńska, Aleksandra
Pandey, Chandan
Rogalski, Grzegorz
author_facet Sauraw, Anupam
Sharma, Atul Kumar
Fydrych, Dariusz
Sirohi, Sachin
Gupta, Ankur
Świerczyńska, Aleksandra
Pandey, Chandan
Rogalski, Grzegorz
author_sort Sauraw, Anupam
collection PubMed
description This article deals with the dissimilar joining of two different grade Cr-Mo steel (2.25Cr-1Mo: P22 and modified 9Cr-1Mo: P91) for power plant application. The dissimilar butt-welded joint was produced for conventional V groove design by using the gas tungsten arc welding (GTAW) process with the application of an ERNiCrMo-3 Ni-based super alloy filler. A microstructure characterization was performed to measure the inhomogeneity in the microstructure and element diffusion across the interface in a welded joint. The experiments were also performed to evaluate the mechanical properties of the dissimilar welded joint in as-welded (AW) and post-weld heat treatment (PWHT) conditions. An acceptable level of the mechanical properties was obtained for the AW joint. After PWHT, a significant level of the element diffusion across the interface of the weld metal and P22 steel was observed, resulting in heterogeneity in microstructure near the interface, which was also supported by the hardness variation. Inhomogeneity in mechanical properties (impact strength and hardness) was measured across the weldments for the AW joint and was reduced after the PWHT. The tensile test results indicate an acceptable level of tensile properties for the welded joint in both AW and PWHT conditions and failure was noticed in the weak region of the P22 steel instead of the weld metal.
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spelling pubmed-85852382021-11-12 Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels Sauraw, Anupam Sharma, Atul Kumar Fydrych, Dariusz Sirohi, Sachin Gupta, Ankur Świerczyńska, Aleksandra Pandey, Chandan Rogalski, Grzegorz Materials (Basel) Article This article deals with the dissimilar joining of two different grade Cr-Mo steel (2.25Cr-1Mo: P22 and modified 9Cr-1Mo: P91) for power plant application. The dissimilar butt-welded joint was produced for conventional V groove design by using the gas tungsten arc welding (GTAW) process with the application of an ERNiCrMo-3 Ni-based super alloy filler. A microstructure characterization was performed to measure the inhomogeneity in the microstructure and element diffusion across the interface in a welded joint. The experiments were also performed to evaluate the mechanical properties of the dissimilar welded joint in as-welded (AW) and post-weld heat treatment (PWHT) conditions. An acceptable level of the mechanical properties was obtained for the AW joint. After PWHT, a significant level of the element diffusion across the interface of the weld metal and P22 steel was observed, resulting in heterogeneity in microstructure near the interface, which was also supported by the hardness variation. Inhomogeneity in mechanical properties (impact strength and hardness) was measured across the weldments for the AW joint and was reduced after the PWHT. The tensile test results indicate an acceptable level of tensile properties for the welded joint in both AW and PWHT conditions and failure was noticed in the weak region of the P22 steel instead of the weld metal. MDPI 2021-11-02 /pmc/articles/PMC8585238/ /pubmed/34772132 http://dx.doi.org/10.3390/ma14216591 Text en © 2021 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
Sauraw, Anupam
Sharma, Atul Kumar
Fydrych, Dariusz
Sirohi, Sachin
Gupta, Ankur
Świerczyńska, Aleksandra
Pandey, Chandan
Rogalski, Grzegorz
Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels
title Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels
title_full Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels
title_fullStr Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels
title_full_unstemmed Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels
title_short Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels
title_sort study on microstructural characterization, mechanical properties and residual stress of gtaw dissimilar joints of p91 and p22 steels
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585238/
https://www.ncbi.nlm.nih.gov/pubmed/34772132
http://dx.doi.org/10.3390/ma14216591
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