The Influence of Loading Mode on the Stress Corrosion Susceptibility of Various Alloy/Environment Systems.

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Abstract:

The influence of loading mode on stress-corrosion susceptibility has been examined for the following systems Ti- 8Al 1Mo 1V alloyaqueous chlorides alpha - brassammoniacal environments, 7075-T6 Al alloy in NaClK2Cr2O7 solutions. With the exception of the alpha- brassammonia system, the stress-corrosion susceptibility of the metals was found to be much greater under tensile mode I loading than torsional mode III loading. Further, in certain instances the addition of hydrogen-recombination cathodic poisons, i.e., arsenic, was found to enhance susceptibility to cracking as a function of loading mode is interpreted to indicate that hydrogen damage is the dominant mechanism leading to failure. Implications of these results to mechanistic understanding are discussed.

Author(s):
Green, J. A. S. ; Hayden, H. W. ; Montague, W. G.
Author Organization(s):
MARTIN MARIETTA LABS BALTIMORE MD
Descriptive Note:
Interim technical rept.,
Pagination:
0035

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MML-TR-75-30c
Contract/Grant Number(s):
N00014-74-C-0277
Project Number(s):
NR-031-716
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*ALUMINUM ALLOYS, *HYDROGEN EMBRITTLEMENT, *STRESS CORROSION, *TITANIUM ALLOYS, *BRASS, CHROMATES, AMMONIA, CRACK PROPAGATION, TENSION, SODIUM CHLORIDE, TORSION, POTASSIUM COMPOUNDS
Field(s)/Group(s):
Properties of Metals and Alloys
Keyword(s):
Fracture toughness, Titanium alloy 8Al 1Mo 1V, Aluminum alloy 7075, Potassium dichromate
Report Date:
1975 Aug 01