Dissimilar autogenous TIG joint of Alloy 617 and AISI 304H steel for AUSC application.

Sachin Sirohi, Amit Kumar, Shailesh M Pandey, Priyambada Purohit, Dariusz Fydrych, Sanjeev Kumar, Chandan Pandey

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Article in Heliyon, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Sachin SirohiDepartment of Mechanical Engineering, SRM Institute of Science and Technology, Delhi NCR Campus, Modinagar, 201204, Uttar Pradesh, India.

Amit KumarDepartment of Mechanical Engineering, Indian Institute of Technology Jodhpur, Jodhpur, 342037, Rajasthan, India.

Shailesh M PandeyDepartment of Mechanical Engineering, National Institute of Technology Patna, Patna, 500078, India.

Priyambada PurohitFaculty of Management Studies, SRM Institute of Science and Technology, Delhi NCR Campus, Modinagar, 201204, Uttar Pradesh, India.

Dariusz FydrychInstitute of Manufacturing and Materials Technology, Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Gabriela Narutowicza Street 11/12, 80-233 Gdańsk, Poland.

Sanjeev KumarDepartment of Mechanical Engineering, SRM Institute of Science and Technology, Delhi NCR Campus, Modinagar, 201204, Uttar Pradesh, India.

Chandan PandeyDepartment of Mechanical Engineering, Indian Institute of Technology Jodhpur, Jodhpur, 342037, Rajasthan, India.

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6 · The paper itself

Abstract

To reduce costs and improve high-temperature performance in Advanced Ultra Super Critical (AUSC) boilers, it is necessary to weld austenitic steel to Inconel alloy. In this study, the autogenous tungsten inert gas (TIG) welding process was used to join Alloy 617 and an austenitic AISI 304H steel plate of thickness 5 mm. Microstructural analysis showed that the microstructure formation was uneven along the weldments, with columnar and cellular dendrites near the interface while the central area of the weld exhibited a combination of columnar, cellular, and equiaxed dendrites. The use of energy dispersive spectroscopy and electron probe micro-analysis unveiled the presence of an unmixed layer at the interface between the weld and AISI 304H steel. Furthermore, a notable variation in the concentration of alloying elements such as Fe, Cr, Ni, Co, and Mo was observed. Within the weld metal, inter-dendritic areas showed the presence of precipitates rich in Cr, Ti, and Mo. Meanwhile, the heat-affected zone (HAZ) of Alloy 617 exhibited the presence of phases like Cr and Mo-rich M

Indexed as

Alloy 617Autogenous TIGDissimilarImpact toughnessMicrostructure

Identifiers

PMID37809790

DOI10.1016/j.heliyon.2023.e19945

PMCPMC10559579

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