A COMPARISON OF THE MICROSTRUCTURAL AND MECHANICAL PROPERTIES OF SUBMERGED ARC WELDS IN HY 80 AND HSLA 80 STEELS

Authors
  1. McGrath, J.T.
  2. Gianetto, J.A.
  3. Orr, R.F.
Corporate Authors
Canada Centre for Mineral and Energy Technology, Ottawa ONT (CAN) Physical Metallurgy Research Labs;Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The notch toughness properties HY80 and HSLA80 SAW weld metals were evaluated in weldments prepared with the same welding consumables and energy inputs. All welds exceeded the targeted Charpy impact energy levels of 81 J at -18C and 47 J at -50C. The HSLA 80 weld showed an increase in toughness at low temperatures with increasing energy input (2 to 4 kJ/mm) while the HY80 weld metal decreased slightly in toughness. The results are explained on the basis of yield strength, weld composition and microstructure. The notch toughness of the coarse grained HAZ measured at 1 mm from the fusion line decreased with increasing energy input for both HY80 and HSLA80 steels. The significance of the HAZ toughness is explained in terms of the type and amount of microstructural constituents at the notch location
Report Number
PMRL-87-55(TR) — Contractor Report (Final)
Date of publication
15 Oct 1987
Number of Pages
30
DSTKIM No
88-01997
CANDIS No
55227
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Hardcopy

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