Effect of precipitation hardening on dynamic strain aging and jerky flow
Strain-rate sensitivity measurements were performed over a wide temperature range in commercial, precipitation hardened Ni and Al alloys. The results indicate that the dynamic strain-aging mechanism is not strongly affected by the presence of a precipitate dispersion. However, since precipitates influence the development of Luders type bands as well as the work hardening rate and other metallurgical variables, the critical strain for the onset of jerky flow is influenced. Therefore, the behavior of the critical strain cannot always be used to examine different theories for the origin of the negative strain-rate dependence of the flow stress which develops during straining and is a necessary (but not sufficient) condition for jerky flow.
- Research Organization:
- Argonne National Lab., IL
- OSTI ID:
- 5764453
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 10:10; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
AGING
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
COPPER ADDITIONS
COPPER ALLOYS
HARDENING
INCONEL ALLOYS
INCONEL X750
IRON ALLOYS
MAGNESIUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
PRECIPITATION HARDENING
SENSITIVITY
SILICON ADDITIONS
SILICON ALLOYS
STRAIN AGING
STRAIN RATE
STRAINS
TITANIUM ALLOYS