ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 4

Experimental Determination of Lüders Band Parameters from Load-Elongation Data

Correia, MT
Assistant and research metallurgist, Universidade Nova de Lisboa, Lisboa Codex,

Fortes, MA
Professor, Instituto Superior Técnico, Lisboa Codex,

Abstract

Methods for measuring the various parameters of a Lüders band (particularly the width and average strain rate) are developed that use exclusively the load-crosshead displacement curves in tension. Experimental values obtained with these methods agree very well with those determined using extensometers. This allows the identification, in the tensile curve, of the points corresponding to the main events in Lüders band deformation leading to the Type A Portevin-Le Chatelier effect.

Keywords:
stress-strain diagrams, tension tests, extensometers, Lüders bands, Portevin-Le Chatelier effect, band parameters, bandwidth

Paper ID: JTE10265J
DOI: 10.1520/JTE10265J
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