Prediction of the critical strain in the Portevin-LeChatelier effect

R. Onodera; T. Morikawa

doi:10.2320/jinstmet1952.65.4_236

Prediction of the critical strain in the Portevin-LeChatelier effect

R. Onodera, T. Morikawa

Materials Processing

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The critical (onset) strain ε_c of a serrated flow was predicted by phenomenological theory based on the strain-softening model. The critical strain predicted by the theory agreed quantitatively with experimental data. In particular, the theory could explain the relation between ε_c and strain rate ε: 3 ln ε_c=C+ln ε+E/RT without using the concept of a Cottrell atmosphere. Moreover, the increase in the critical strain for very small strain rates (the so-called type C serration) could also be simply explained by the theory.

Original language	English
Pages (from-to)	236-243
Number of pages	8
Journal	Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume	65
Issue number	4
DOIs	https://doi.org/10.2320/jinstmet1952.65.4_236
Publication status	Published - Jan 1 2001

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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AB - The critical (onset) strain εc of a serrated flow was predicted by phenomenological theory based on the strain-softening model. The critical strain predicted by the theory agreed quantitatively with experimental data. In particular, the theory could explain the relation between εc and strain rate ε: 3 ln εc=C+ln ε+E/RT without using the concept of a Cottrell atmosphere. Moreover, the increase in the critical strain for very small strain rates (the so-called type C serration) could also be simply explained by the theory.

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Prediction of the critical strain in the Portevin-LeChatelier effect

Abstract

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