CRACK ARREST TOUGHNESS OF A SHIP STRUCTURAL STEEL

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Authors
  1. Pussegoda, L.N.
  2. Malik, L.
  3. Morrison, J.
  4. Garneau, S.
Corporate Authors
Fleet Technology Ltd, Kanata ONT (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Esquimalt Defence Research Detachment and Director Maritime Ship Support have initiated a project to develop procedures and then determine the crack arrest toughness of ship structural steels typical of those used in naval surface ships. In the project to date, a 16 mm thick 350 WT steel has been characterized in terms of its standard mechanical properties (CVN, DT etc.) in both the L-T and T-L orientations. Tests have been performed in the L-T orientation, using the procedure in ASTM Standard E1221 to determine Plane Strain Crack Arrest Toughness but with little success in meeting all of the validity requirements. Full thickness compact crack arrest tests with embrittled chevron notch were then tried using specimens machined in both L-T and T-L orientations, and resulted in improved success. However, further work is required to improve the success rate. The crack arrest toughness results obtained in the project will be presented and attempts made to relate these to the steel's conventional toughness properties.
Report Number
DREA-SR-97-002-PAP-26 — CONTAINED IN 98-00986
Date of publication
01 Oct 1997
Number of Pages
16
DSTKIM No
98-01012
CANDIS No
507229
Format(s):
Hardcopy;Document Image stored on Optical Disk

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