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Hydrogen transport and embrittlement in 300 M and AerMet100 ultra high strength steels

By Douglas J. Figueroa-Gordon and M. J. Robinson

Abstract

This paper describes how hydrogen transport affects the severity of hydrogen embrittlement in 300 M and AerMet100 ultra high strength steels. Slow strain rate tests were carried out on specimens coated with electrodeposited cadmium and aluminium-based SermeTel 1140/962. Hydrogen diffusivities were measured using two-cell permeation and galvanostatic charging methods and values of 8.0 × 10−8 and 1.0 × 10−9 cm2 s−1 were obtained for 300 M and AerMet100, respectively. A two-dimensional diffusion model was used to predict the hydrogen distributions in the SSR specimens at the time of failure. The superior embrittlement resistance of AerMet100 was attributed to reverted austenite forming around martensite laths during t

Topics: A. Steel, B. Hydrogen permeation, B. Galvanostatic, C. Hydrogen embrittlement
Publisher: Elsevier Science B.V., Amsterdam.
Year: 2010
DOI identifier: 10.1016/j.corsci.2010.01.001
OAI identifier: oai:dspace.lib.cranfield.ac.uk:1826/4322
Provided by: Cranfield CERES
Journal:

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