Delayed Cracking in Submarine Steel Weldments

PDF

Authors
  1. Pussegoda, L.N.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);Fleet Technology Ltd, Kanata ONT (CAN)
Abstract
An interactive 2-D hydrogen diffusion finite difference computer model was used to compare compare experimental delayed cracking time for repair welds with model predictions. Two repair simulations with widely differing hydrogen diffusion distances were evaluated. The shorter diffusion distance gave shorter delay time to reach peak hydrogen concentration at the critical cracking site compared with the larger diffusion distance. The complimentary experimental results demonstrated this. The model was also used to simulate hydrogen effusion experiments performed on standard specimens to determine diffusivity. Further use of the model was to derive a “critical hydrogen curve” for the single pass weld made from E11018 electrode on HY-80 base metal. Results from delayed cracking tests on the tempered weld metal displayed lower hydrogen sensitivity. Finally, the next steps for way-ahead on delayed cracking are outlined in the recommendations.

Il y a un résumé en français ici.

Report Number
DRDC-ATLANTIC-CR-2001-075 — Contractor Report
Date of publication
01 Jul 2001
Number of Pages
78
DSTKIM No
CA032139
CANDIS No
531206
Format(s):
CD ROM

Permanent link

Document 1 of 1

Date modified: