Metallurgical and mechanical properties of hydrogen charged carbide-free bainitic weld metals

Janaki Ram, G.D. (2023) Metallurgical and mechanical properties of hydrogen charged carbide-free bainitic weld metals. International Journal of Hydrogen Energy, 48 (48). pp. 18514-18525. ISSN 0360-3199

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Abstract

Hydrogen embrittlement is a major concern during the welding of high-strength steels. The susceptibility of the welds to hydrogen embrittlement increases with increase in weld strength. The ever-increasing demand to increase the strength of steels necessitates the development of novel welding procedures and fillers to produce welds of high strength and with resistance to hydrogen embrittlement. In this current work, the susceptibility of carbide-free bainitic weld metals to hydrogen embrittlement is studied with varying volume fractions of constituent phases. Using three different weld metal compositions, six different weld metal microstructures of carbide-free bainite were generated. The hydrogen saturation behaviour of the various weld metals was studied by cathodic electrolytic charging and subsequent diffusible hydrogen measurements by the hot extraction method. Tensile tests were conducted on various weld metals with and without hydrogen charging to evaluate their susceptibility to hydrogen embrittlement. The results show that the carbide-free bainite weld metals are highly resistant to hydrogen embrittlement despite their very high strength.

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IITH Creators:

IITH Creators	ORCiD
Janaki Ram, G.D.	http://www.orcid.org/0000-0002-7580-763X

Item Type:

Article

Uncontrolled Keywords:

Carbide-free bainite weld; Diffusible hydrogen; Hydrogen embrittlement; Nanostructured bainitic steels; Retained austenite; Bainitic steel; Carbide-free bainite weld; Carbide-free bainites; Diffusible hydrogen; High-strength; Metallurgical and mechanical properties; Nano-structured; Nanostructured bainitic steel; Retained austenite; Weld metal; Bainite; Carbides; Extraction; High strength steel; Hydrogen embrittlement; Tensile testing; Welding; Welds

Subjects:

Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

04 Jan 2024 15:03

Last Modified:

04 Jan 2024 15:03

URI:

http://raiithold.iith.ac.in/id/eprint/11770