A CRITICAL ANALYSIS OF THE SERRATED FLOW OF PORTEVIN - LE CHATELIER EFFECT

Authors

  • K CHIHAB Université de Béjaïa
  • L.P KUBIN Laboratoire d'Etude des Microstructures ONERA , Châtillon

Keywords:

Plastic instabilities, Portevin - Le Chatelier effect, relaxation oscillations, deformation bands, spatial correlation

Abstract

Plastic instabilities associated with the Portevin - Le Chatelier (PLC) effect will be examined with special attention to relaxation oscillations behaviour. The types of serrations are studied and interpreted in terms of a constitutive flow model which takes into account stress dependent changes accompanying a strain rate changes. The experimental data in aluminium - magnesium industrial dilute alloys are discussed in the light of the present study and a new analysis vision of PLC effect is proposed. Emphasis is put on the connection between the different types of instabilities and the relaxation oscillations behaviour. The spatial correlation in the case of A and B types of PLC instabilities is investigated and discussed with reference to A9G5 alloy.

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Author Biography

K CHIHAB, Université de Béjaïa

Equipe de Recherche Plasticité et Microstructures des Matériaux Métalliques
Département de Physique

References

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Published

2000-12-01

How to Cite

CHIHAB, K., & KUBIN, L. (2000). A CRITICAL ANALYSIS OF THE SERRATED FLOW OF PORTEVIN - LE CHATELIER EFFECT. Sciences & Technology. A, Exactes Sciences, (14), 25–28. Retrieved from https://revue.umc.edu.dz/a/article/view/1664

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