Interpretation of steady-state creep rate in mechanically alloyed Al-C-O alloys

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(94)90163-5· OSTI ID:5119680

Dobes, F; Kucharova, K; Orlova, A; Milicka, K; Cadek, J ^[1]

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1. Academy of Sciences of the Czech Republic, Brno (Czechoslovakia). Inst. of Physical Metallurgy

The steady-state creep rate of pure aluminum and of four mechanically alloyed aluminum alloys was obtained within more extensive study of the creep behavior of these materials. Creep data can be rationalized by introducing a threshold stress below which the creep rate is negligible. The estimated threshold stress grows with the increasing content of both carbon and oxygen. Within the threshold stress concept it can be shown that the data are in accord with the natural creep law. The steady-state creep rate can alternatively be described by the equation of thermally activated detachment of dislocations from dispersed particles. A new procedure for evaluation of the relaxation parameter characterizing this process is presented.

• OSTI ID: 5119680
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 42:4; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
ALUMINIUM CARBIDES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON
CARBON ADDITIONS
CARBON COMPOUNDS
CHALCOGENIDES
CREEP
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MICROSTRUCTURE
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN
OXYGEN ADDITIONS
OXYGEN COMPOUNDS
TEMPERATURE DEPENDENCE