Accession Number:

AD0669208

Title:

STRENGTHENING MECHANISMS IN DISPERSION HARDENED NICHROME,

Descriptive Note:

Corporate Author:

BOEING CO RENTON WASH AIRPLANE DIV

Personal Author(s):

• Webster,Donald

Report Date:

1968-01-23

Pagination or Media Count:

46.0

Abstract:

The strengthening mechanisms in TD Nichrome was examined at temperatures between 70F and 2000F. A contribution to strength at all temperatures comes from solid solution hardening, dispersion hardening and dislocation substructure hardening. Grain size hardening is operative only below 800F at higher temperatures a fine grain size results in a loss of strength. The contribution of dispersion hardening is almost constant up to 1000F and then drops sharply. Dislocation substructure strengthening becomes increasingly important as the testing temperature is increased and is the major strengthening factor at 2000F. Author

Descriptors:

• (*NICKEL ALLOYS
• *DISPERSION HARDENING)
• HARDENING
• CHROMIUM ALLOYS
• THORIUM COMPOUNDS
• DIOXIDES
• SOLID SOLUTIONS
• DISLOCATIONS
• GRAIN SIZE
• DUCTILITY
• TENSILE PROPERTIES
• GRAIN STRUCTURES(METALLURGY)
• FATIGUE(MECHANICS)
• STRESSES

Subject Categories:

• Metallurgy and Metallography
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE