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Plastic deformation; Portevin–Le Chatelier effect; aluminum alloy; steel; Poisson distribution.

The Portevin–Le Chatelier (PLC) effect is a kind of plastic instability observed in many dilute alloys when deformed at certain ranges of strain rate and temperature. In this paper we present a comprehensive statistical analysis of the observed experimental data obtained during PLC effect and establish that the occurrence probability of the stress drops in the dynamical process responsible for PLC effect is Poisson in nature.

A Chatterjee¹ P Mukherjee¹ N Gayathri¹ P Barat¹ Arnab Barat² A Sarkar³

1. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
2. Indian Statistical Institute, 203 B.T. Road, Kolkata 700 105, India
3. Mechanical Metallurgy Section, Bhabha Atomic Research Centre, Mumbai 400 085, India

Published

August 2011

Manuscript received

19 October 2010