Correlation between vanadium carbide size and hydrogen trapping in ferritic steel
Accepted version
Peer-reviewed
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Repository DOI
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Authors
Turk, A
San Martín, D
Rivera-Díaz-del-Castillo, PEJ
Galindo-Nava, EI
Abstract
Hydrogen trapping on vanadium carbides (VC) was studied in a low-carbon ferritic steel. Thermal desorption analysis was performed on two conditions with different carbide sizes but identical volume fractions. Smaller carbides with a higher effective surface area trapped significantly more hydrogen. A correlation between carbide size and hydrogen trap density was established, suggesting that trapping is surface-dominant and a scaling law for trap density was derived. The amount of trapped hydrogen was overall much lower than previously reported for VC-containing martensitic steels. It is therefore suggested that in the absence of a dislocated matrix VC traps relatively little hydrogen.
Description
Keywords
Hydrogen diffusion, Ferritic steels, Microstructure, Carbides, Thermal desorption analysis
Journal Title
Scripta Materialia
Conference Name
Journal ISSN
1359-6462
Volume Title
152
Publisher
Elsevier BV
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/L014742/1)
Engineering and Physical Sciences Research Council (EP/H500375/1)
Engineering and Physical Sciences Research Council (EP/H022309/1)
Engineering and Physical Sciences Research Council (EP/M005607/1)
Engineering and Physical Sciences Research Council (EP/H500375/1)
Engineering and Physical Sciences Research Council (EP/H022309/1)
Engineering and Physical Sciences Research Council (EP/M005607/1)
We gratefully acknowledge the funding received from the HEmS project (grant number EP/L014742/1) and the EPSRC-Rolls Royce strategic partnership (EPSRC grant numbers EP/H022309/1 and EP/H500375/1). E. I. Galindo-Nava acknowledges the Royal Academy of Engineering for his research fellowship funding.