Method for locating metallic nitride inclusions in metallic-alloy ingots
High speed rotating aircraft parts require high-strength metals such as titanium. Titanium nitride or oxynitride inclusions in titanium and titanium alloy parts lower strength, sometimes with disastrous results. Investigators have searched for the best means during various melting methods, for dissolving titanium nitride inclusions that may cause failure of high-speed, rotating, titanium alloy parts in jet engines. No accurate or quantitative means is presently available to determine the dissolution history of such inclusions. The invention provides a method of determining the location and history of metallic nitride and/or oxynitride inclusions in metallic melts. The method includes the steps of labeling metallic nitride and/or oxynitride inclusions by making a coreduced metallic-hafnium sponge. The ingots are neutron activated and the hafnium is located by radiometric means.
- Research Organization:
- Department of the Interior, Washington, DC (United States)
- Assignee:
- Department of the Interior, Washington, DC.
- Patent Number(s):
- PAT-APPL-7-696 805
- OSTI ID:
- 6268083
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400101* -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
ACTIVATION ANALYSIS
AIRCRAFT COMPONENTS
ALKALINE EARTH METALS
ALLOYS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DETECTION
DISSOLUTION
ELEMENTS
HAFNIUM
HALIDES
HALOGEN COMPOUNDS
INCLUSIONS
ISOTOPE APPLICATIONS
MAGNESIUM
MELTING
METALLURGY
METALS
NEUTRON ACTIVATION ANALYSIS
NITRIDES
NITROGEN COMPOUNDS
PHASE TRANSFORMATIONS
PNICTIDES
REDUCTION
TITANIUM ALLOYS
TITANIUM COMPOUNDS
TITANIUM NITRIDES
TRACER TECHNIQUES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM ALLOYS