Paper Title:
Hydrogen Trap on the Microstructure of Cr-Mo Type Steels
  Abstract

Microstructure influence on hydrogen trapping in a Cr-Mo type steels −2.25Cr 1Mo and 2.25Cr 1Mo 0.25V− was studied by means of electrochemical permeation test, thermal desorption spectrometry, scanning and transmission electron microscopy analysis. Both steels, used in hydrogenation reactors, in as received and artificial aged conditions exhibit a bainitic microstructure with CrxMoy and CrxMoyVz carbides finely dispersed. The hydrogen diffusivity for the 2.25Cr-1Mo-0.25V is lower than 2.25Cr-1Mo due to its higher carbide precipitation. At aged conditions TDS on samples cathodically charged with hydrogen showed an increase on the hydrogen trapping capacity for 2.25Cr-1Mo and a reduction for the vanadium modified steel, compared with the as-received state.

  Info
Periodical
Defect and Diffusion Forum (Volumes 283-286)
Edited by
Andreas Öchsner, Graeme E. Murch and Ali Shokuhfar
Pages
370-375
DOI
10.4028/www.scientific.net/DDF.283-286.370
Citation
L.F. Lemus, J. H. Rodrigues, D.S. Santos, L.H. Almeida, "Hydrogen Trap on the Microstructure of Cr-Mo Type Steels", Defect and Diffusion Forum, Vols. 283-286, pp. 370-375, 2009
Online since
March 2009
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$32.00
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