The Hydrogen-Induced Cracking Resistance of Consumables for Use in the Fabrication of the COLLINS Class Submarines.

reportActive / Technical Report | Accession Number: ADA315630 | Open PDF

Abstract:

A MIL-121TM flux cored arc welding consumable, Alloy Rods Dualshieldregistered II 120-M2, has recently been qualified for use in the fabrication of the pressure hull of the Royal Australian Navy COLLINS class submarines. Gapped bead on plate testing has been carried out to compare the hydrogen-induced cracking resistance of welds produced using the flux cored arc consumable with welds produced using the manual metal arc and submerged arc consumables currently used on the submarines. These tests will ensure that the introduction of the flux cored arc welding consumable does not increase the risk of hydrogen-induced cracking in the submarine pressure hull. The resistance of the flux cored arc welding consumable was found to be better than either the manual metal arc or the submerged arc consumables and the introduction of the flux cored arc welding consumable for use in the welding of the COLLINS pressure hull does not increase the risk of hydrogen induced cracking. The lower strength level of the deposited flux cored arc weld metal, contributed to its greater hydrogen-induced cracking resistance by reducing the residual stress state in the weld metal and by improving its inherent resistance to hydrogen embrittlement. It is shown that there is no fundamental reason for a one to one relationship between hydrogen-induced cracking resistance and toughness in nominally 690 MPa yield stress weld metal. The hardness of the heat affected zones produced by each of the processes were not significantly different and gave no information regarding the likelihood of weld metal hydrogen induced cracking.

Author(s):
Davidson, James L.
Author Organization(s):
AERONAUTICAL AND MARITIME RESEARCH LAB MELBOURNE (AUSTRALIA)
Descriptive Note:
Technical rept.,
Pagination:
0027

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
DSTO-TR-0354, DODA-AR-009-729
Monitor Series:
AR-009-729, XD
 Subject Terms
Joint Capability Areas:
JCA_4.2.3_Manage Global Supplier Networks; JCA_4.2_Supply; JCA_5_Command and Control; JCA_1_Force Support; JCA_5.2.3_Share Knowledge and Situational Awareness; JCA_5.2_Understand; JCA_1.2_Force Preparation; JCA_5.5_Direct; JCA_1.2.3_Educating; JCA_5.5.1_Communicate Intent and Guidance; JCA_1.3_Human Capital Management; JCA_6.4.1_Secure Information Exchange; JCA_6_Net Centric; JCA_1.3.2_Personnel Management; JCA_6.2.1_Information Sharing; JCA_6.2.2_Computing Services; JCA_5.5.2_Task; JCA_6.4_Information Assurance
Communities of Interest:
Ground and Sea Platforms
Descriptor(s):
*RESISTANCE, *CRACKS, *HYDROGEN EMBRITTLEMENT, *SUBMARINES, *ARC WELDING, *PRESSURE HULLS, *FLUXES(FUSION), CORES, RISK, NAVY, TOUGHNESS, WELD METAL, WELDS, RESIDUAL STRESS, HEAT, AUSTRALIA, SUBMARINE HULLS, LOW STRENGTH, HARDNESS, WELDING, SUBMERGED ARC WELDING
Field(s)/Group(s):
Fabrication Metallurgy, Inorganic Chemistry, Physical Chemistry, Submarine Engineering
Keyword(s):
*COLLINS CLASS VESSELS, FOREIGN REPORTS, ARC WELDING CONSUMABLE, ALLOY RODS DUALSHIELD, CONSUMABLES
Report Date:
1996 Jul 01
Creation Date:
1996 Nov 13