Journal ArticleDOI
On the mechanism of serrated yielding and dynamic strain ageing
TLDR
Theoretical models of dynamic strain ageing in general and the onset of serrated yielding in particular are based on the interaction between moving dislocations and diffusing solute atoms as discussed by the authors.About:
This article is published in Acta Metallurgica.The article was published on 1980-07-01. It has received 155 citations till now. The article focuses on the topics: Strain rate & Deformation (engineering).read more
Citations
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Journal ArticleDOI
Serrated plastic flow
TL;DR: In this paper, the authors present an assessment of the current understanding of the phenomenon of serrated plastic flow, which manifests itself as serrations, load drops, jerkiness or other discontinuities in the stress-strain curves obtained in constant extension rate tensile tests, and as sudden bursts of strain in constant loading rate tests and in constant load (stress) creep tests (the so called staircase creep).
Journal ArticleDOI
Evolution of dislocation densities and the critical conditions for the Portevin-Le Châtelier effect
L.P. Kubin,Y. Estrin +1 more
TL;DR: In this paper, a model for the critical strains associated with the Portevin-Le Châtelier effect (PLC) in terms of the strain dependence of the densities of mobile and forest dislocations is proposed.
Journal ArticleDOI
Microstructural and mechanical influences on dynamic strain aging phenomena
J. M. Robinson,M. P. Shaw +1 more
TL;DR: The PLC effect is a manifestation of macroscopic scale non-uniformities which have their origins on a microstructural level as discussed by the authors, and the coordination of dislocation level events with respect to PLC has been studied extensively.
Journal ArticleDOI
The Portevin-Le Chatelier effect: a review of experimental findings.
TL;DR: The characteristic behaviors of localized strain bands and techniques commonly used to study the PLC effect are summarized and some discussion on the mechanisms of the effect are included.
Journal ArticleDOI
The strain dependence of static and dynamic strain-aging
A. van den Beukel,U.F. Kocks +1 more
TL;DR: In this article, a model that combines possible aging effects on the friction stress and on forest hardening is proposed, and the dependence of both static and dynamic strain-aging on strain is predicted and compared with available experimental information.
References
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Journal ArticleDOI
A model for the Portevin-Le Chatelier effect in substitutional alloys
TL;DR: In this article, the authors derived a model for the onset of the Portevin-Le Chatelier effect in substitutional alloys, based on the solute locking of dislocations temporarily arrested at obstacles in the glide path.
Journal ArticleDOI
LXXXVI. A note on the Portevin-Le Chatelier effect
TL;DR: In this paper, the concentration of vacancies is increased by plastic deformations, which can cause strain ageing at room temperature, and the authors propose a method to deal with this problem.
Journal ArticleDOI
Theory of the effect of dynamic strain aging on mechanical properties
TL;DR: In this paper, the authors described dynamic strain aging (DSA) in solid solutions as diffusion of solute atoms to mobile dislocations, temporarily arrested at obstacles, and calculated the dependence of the flow stress on strain rate, temperature, and strain in the presence of DSA.
Journal ArticleDOI
New observations on the mechanisms of dynamic strain aging and of jerky flow
R.A. Mulford,U.F. Kocks +1 more
TL;DR: In this article, the rate sensitivity of the flow stress was investigated as a function of pre-strain for a commercial nickel alloy (INCONEL 600) and for polycrystalline Al-1% Mg. over a wide temperature range encompassing the regime of jerky flow.
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New observations on the mechanisms of dynamic strain aging and of jerky flow
R.A. Mulford,U.F. Kocks +1 more