Hot salt stress corrosion cracking of titanium alloys: an improved model for the mechanism

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · Corrosion; (United States)

DOI:https://doi.org/10.5006/0010-9312-33.7.252· OSTI ID:7289933

Myers, J R ^[1]; Hall, J A

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1. Air Force Inst. of Tech., Wright-Patterson Air Force Base, OH

An improved model explains the hot salt stress corrosion cracking (HSSCC) of titanium alloys. Basically, corrosion produced hydrogen from a secondary cathodic reaction is responsible for the premature failure which can occur when tensile stressed titanium alloys are exposed to chloride containing hot salt environments. The electrochemical model is consistent with all observations and data which have been reported and verified by earlier HSSCC investigators. Examination of the mechanism provides an explanation why titanium alloy components in aircraft gas turbine engines probably have not failed by HSSCC in service. Microstructural factors are involved in the cracking process. Optically observable microstructures probably should not be used in discussing the relative susceptibility of titanium alloys to HSSCC.

• OSTI ID: 7289933
• Journal Information: Corrosion; (United States), Journal Name: Corrosion; (United States) Vol. 33:7; ISSN CORRA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHEMICAL REACTIONS
CORROSION
CRACKS
CRYSTAL STRUCTURE
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
STRESS CORROSION
TENSILE PROPERTIES
TITANIUM ALLOYS