Inverse critical strains for jerky flow in Al-Mg alloys

The influence of the initial precipitation microstructure, as produced by various treatments, has been investigated in the past years in several Al alloys. However, the results obtained so far have been inconclusive or contradictory. The working hypothesis to be tested in the present work is that th...

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Bibliographic Details
Published in:Scripta materialia 2000-02, Vol.42 (5), p.465-471
Main Authors: Balı́k, J, Lukáč, P, Kubin, L.P
Format: Article
Language:English
Subjects:
ALUMINIUM ALLOYS
Applied sciences
CONCENTRATION RATIO
Condensed matter: structure, mechanical and thermal properties
Critical strains
DEFORMATION
Deformation and plasticity (including yield, ductility, and superplasticity)
Exact sciences and technology
EXPERIMENTAL DATA
MAGNESIUM ALLOYS
MATERIALS SCIENCE
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Metals. Metallurgy
MICROSTRUCTURE
Physics
Plastic instabilities
Portevin-Le Chatelier effect
STRAIN RATE
STRAINS
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Summary:The influence of the initial precipitation microstructure, as produced by various treatments, has been investigated in the past years in several Al alloys. However, the results obtained so far have been inconclusive or contradictory. The working hypothesis to be tested in the present work is that the initial dislocation density governs the critical strain behavior. For this purpose, the influence of prestrains performed in different conditions is examined and discussed in simple terms.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(99)00373-5