Numerical modeling of the Portevin-Le Chatelier effect

Journal Article · Mon May 01 04:00:00 EDT 1995 · Acta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-7151(94)00390-4· OSTI ID:55346

McCormick, P G; Ling, C P ^[1]

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1. Univ. of Western Australia, Nedlands (Australia). Dept. of Mechanical and Materials Engineering

A numerical model has been developed to describe the inhomogeneous deformation associated with the Portevin-Le Chatelier effect. The model is based on the transient behavior of dynamic strain aging resulting from the time dependence of the solute concentration at arrested dislocations. Spatial effects are included through a Bridgman-type factor which takes into account stress triaxiality effects at geometrical inhomogeneities. Numerically simulated stress-strain curves are shown to be in excellent agreement with experiment, with all of the important features of the Portevin-Le Chatelier effect being exhibited by the model.

• OSTI ID: 55346
• Journal Information: Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 5 Vol. 43; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
DEFORMATION
DISLOCATIONS
FLOW STRESS
MAGNESIUM ALLOYS
MATHEMATICAL MODELS
METALLURGICAL EFFECTS
PORTEVIN-LE CHATELIER EFFECT
SILICON ALLOYS
STRAIN AGING