Method for locating metallic nitride inclusions in metallic-alloy ingots

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:6268083

White, J C; Schmitt, R A; Tratu, D E; Oden, L L

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
• Resource Relation: Patent File Date: 7 May 1991
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
TITANIUM ALLOYS
CHEMICAL ANALYSIS
TITANIUM NITRIDES
NEUTRON ACTIVATION ANALYSIS
AIRCRAFT COMPONENTS
CHLORIDES
DETECTION
DISSOLUTION
HAFNIUM
INCLUSIONS
MAGNESIUM
MELTING
METALLURGY
REDUCTION
TRACER TECHNIQUES
ZIRCONIUM ALLOYS
ACTIVATION ANALYSIS
ALKALINE EARTH METALS
ALLOYS
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
ISOTOPE APPLICATIONS
METALS
NITRIDES
NITROGEN COMPOUNDS
PHASE TRANSFORMATIONS
PNICTIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
400101* - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures