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:	Anupam Sauraw, Atul Kumar Sharma, Dariusz Fydrych, Sachin Sirohi, Ankur Gupta, Aleksandra Świerczyńska, Chandan Pandey, Grzegorz Rogalski
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	P91 steel P22 steel ERNiCrMo-3 GTAW welding dissimilar welded joint microstructure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/b9020a8a83d3439f9569d7fc6e8eea97
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spelling	oai:doaj.org-article:b9020a8a83d3439f9569d7fc6e8eea972021-11-11T18:08:37ZStudy on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels10.3390/ma142165911996-1944https://doaj.org/article/b9020a8a83d3439f9569d7fc6e8eea972021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6591https://doaj.org/toc/1996-1944This 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.Anupam SaurawAtul Kumar SharmaDariusz FydrychSachin SirohiAnkur GuptaAleksandra ŚwierczyńskaChandan PandeyGrzegorz RogalskiMDPI AGarticleP91 steelP22 steelERNiCrMo-3GTAW weldingdissimilar welded jointmicrostructureTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6591, p 6591 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	P91 steel P22 steel ERNiCrMo-3 GTAW welding dissimilar welded joint microstructure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	P91 steel P22 steel ERNiCrMo-3 GTAW welding dissimilar welded joint microstructure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Anupam Sauraw Atul Kumar Sharma Dariusz Fydrych Sachin Sirohi Ankur Gupta Aleksandra Świerczyńska Chandan Pandey Grzegorz Rogalski Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels
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.
format	article
author	Anupam Sauraw Atul Kumar Sharma Dariusz Fydrych Sachin Sirohi Ankur Gupta Aleksandra Świerczyńska Chandan Pandey Grzegorz Rogalski
author_facet	Anupam Sauraw Atul Kumar Sharma Dariusz Fydrych Sachin Sirohi Ankur Gupta Aleksandra Świerczyńska Chandan Pandey Grzegorz Rogalski
author_sort	Anupam Sauraw
title	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_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_sort	study on microstructural characterization, mechanical properties and residual stress of gtaw dissimilar joints of p91 and p22 steels
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b9020a8a83d3439f9569d7fc6e8eea97
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Study on Microstructural Characterization, Mechanical Properties and Residual Stress of GTAW Dissimilar Joints of P91 and P22 Steels

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