AN EVALUATION OF THE NOTCH TOUGHNESS OF THE HEAT AFFECTED ZONE IN HY AND HSLA STEELS

Authors
  1. Bowker, J.T.
  2. Letts, M.W.
  3. Gianetto, J.A.
  4. 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
Using the Gleeble 1500 thermal/mechanical simulator the coarse-grain heat-affected zone region (CGHAZ) was simulated in the more conventional HY80, HY100 and Q1N high strength steels for naval application. The notch toughness properties of the CGHAZ of these steels were compared with that of the lower carbon precipitation hardened HSLA80 steel. The CGHAZ of the HSLA80 steel had a significantly higher toughness than the HY and Q1N steels in specimens simulated at an energy input of 2 kJ/mm. At an energy input of 4 kJ/mm all of the steels had poor toughness in the CGHAZ. The toughness results are explained on the basis of microstructural characteristics.
Report Number
PMRL-87-54(TR) — Contractor Report (Final)
Date of publication
15 Oct 1987
Number of Pages
21
DSTKIM No
88-01998
CANDIS No
55228
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Hardcopy

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