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Designing steel to resist hydrogen embrittlement Part 2–precipitate characterisation

Published version
Peer-reviewed

Type

Article

Change log

Authors

Abstract

jats:p A novel, low-alloy steel has been designed for use in the oil and gas industry. Its high strength and hydrogen trapping potential are derived from a martensitic microstructure containing a dispersion of fine vanadium–molybdenum alloy carbides that evolve during tempering. In this second paper, the effect of quench rate from austenitisation and tempering conditions are investigated with respect to the microstructure. The alloy loses its tempering resistance following slow-cooling from austenitisation as a result of MC precipitation, leading to vanadium depletion and significant M[Formula: see text]C coarsening. This is predicted using computer simulation and confirmed by high energy X-ray diffraction, combined with electron microscopy. </jats:p>

Description

Keywords

Hydrogen embrittlement, precipitate coarsening, precipitate transformation, alloy design hydrogen embrittlement, precipitate coarsening, precipitate transformation, alloy design

Journal Title

Materials Science and Technology (United Kingdom)

Conference Name

Journal ISSN

0267-0836
1743-2847

Volume Title

34

Publisher

SAGE Publications
Sponsorship
BP-ICAM