Assessment of Meta-Lax on ASTM A517 and HY80 weldments

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Authors
  1. Pelletier, G.R.
  2. Porter, J.F.
  3. Lee, G.M.C.
Corporate Authors
Dalhousie Univ, Halifax NS (CAN) Dept of Metallurgical Engineering;Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Defence Research Establishment Atlantic Dockyard Laboratory (DREA/DL) purchased for assessment purposes. Meta-Lax stress-relieving equipment from Bonal Technologies Inc. Claims are that Meta-Lax will relieve thermal stresses within metal components by using non-destructive sub-harmonic vibration, thus, improving the mechanical properties of weldments when applied during welding. This technology was assessed by comparing the shielded metal arc welding (SMAW) weldments of ASTM A517 and HY80 steels. Five ASTM A517 steel plates and two HY80 steel plates were welded. Charpy V-Notch and Dynamic Tear impact tests specimens were removed from each welded plate and tested at temperatures ranging from 25C to -40C. The fractured Charpy V-Notch specimen surfaces were further examined with a scanning electron microscope (SEM). Metallography specimens were mounted, polished and etched. Rockwell Macro-Hardness tests were performed on specimens from each plate. The Charpy V-Notch and Dynamic Tear impact tests did not provide conclusive results with regards to the Meta-Lax process. However, the specimens that had the benefit of the Metalax process had consistently lower hardnesses.
Report Number
DREA-SR-2001-094-SES-VII-PAP-35 — Special Report
Date of publication
01 Oct 2001
Number of Pages
30
DSTKIM No
CA011872
CANDIS No
516450
Format(s):
Hardcopy;Document Image stored on Optical Disk

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