Monitoring of welding induced strains during cladding

Authors
  1. Tiku, S.
  2. Pussegoda, N.
  3. Begg, D.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);BMT Fleet Technology Limited, Kanata Ont (CAN)
Abstract
Structural issues surrounding weld clad materials are becoming increasingly important. For VICTORIAclass submarines, weld cladding or weld buttering have been used to address both misalignment resulting from poor fit up between mating parts and to reclaim corrosion wastage. The use of weld cladding to reclaim corrosion wastage would potentially involve the deposition of considerable volume of weld material extending over a large surface area. Concern has been raised regarding the structural influence of depositing such significant volumes of weld material on the pressure hull. In response to this concern, DRDC Atlantic has undertaken research activities aimed at examining the influence of weld cladding on the structural behaviour. The primary purpose of this investigation is to monitor the development of welding induced strains during cladding, which will lead to an estimate of clad area limitations. The results generated from this activity will serve as both inputs and experimental validation for further numerical studies aimed at understanding the mechanical implications of the clad generated residual stress state and mismatched material behaviour. In the present program two Q1N plates measuring 427 mm X 427 mm X 30 mm were prepared. In the center of one plate, a 3 mm deep and 100 mm X 100 mm square groove was machined on one face. A 3 mm deep and 200 mm X 200 mm square groove was machined in the second plate. The plates were then rigidly affixed to a frame to prevent/minim

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Report Number
DRDC-ATLANTIC-CR-2008-114 — Contractor Report
Date of publication
01 Jul 2008
Number of Pages
108
DSTKIM No
CA031891
CANDIS No
530980
Format(s):
Electronic Document(PDF)

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