Hydrogen Induced Cracks in Armor Steel Weldments Fabricated with Austenitic Filler Alloys

reportActive / Technical Report | Accession Number: ADA188733 | Open PDF

Abstract:

Hydrogen induced cracks have been identified in the weld metal of cast armor steel weldments fabricated with austenitic electrodes. Cracks propagated through a well defined band of materials located between the fusion boundary and the composite region of the weld metal. Martensite band formation was found to result from the combined effects of vigorous hydrodynamic forces, especially in large molten weld pools, and the interdiffusion of alloying elements in that system formed between the base metal and the weld metal. Methods of controlling this form of cracking include limiting base metal dilution, minimizing the concentration of available hydrogen in the welding arc atmosphere, or the selection of more suitable ferritic filler alloys. Keywords Welding, Armor, Stainless steel, Hydrogen, Cracking.

Author(s):
Ricci, William S.
Author Organization(s):
ARMY LAB COMMAND WATERTOWN MA MATERIALTECHNOLOGY LAB
Descriptive Note:
Final rept.
Pagination:
0015

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MTL-TR-87-50
Task Number(s):
DA
Project Number(s):
1L263102D077
Monitor Series:
LABCOM
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_5_Command and Control; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_4.6_Engineering; JCA_5.2_Understand
Modernization Areas:
Space; Fully Networked C3
Communities of Interest:
Ground and Sea Platforms
Descriptor(s):
*ARMOR, *CRACKS, *WELDMENTS, *ORDNANCE STEEL, MELTS, STAINLESS STEEL, CRACK PROPAGATION, ELECTRODES, DILUTION, FERRITES, BASE METAL, FILLERS, WELDING, CASTINGS, HYDRODYNAMICS, DIFFUSION, LIMITATIONS, WELDS, AUSTENITE, HYDROGEN, WELD METAL
Field(s)/Group(s):
Properties of Metals and Alloys, Armor
Keyword(s):
AS077, PE63102A
Report Date:
1987 Sep 01