Author(s)

M. Beghini, L. Bertini & V. Fontanari

Abstract

Evaluation of the flow curve of metallic materials by means of spherical indentation M. Beghini*, L.Bertini*, V. Fontanarf '' Dip. Ingegneria Meccanica, Nucleare e della Produzione - Universita di Pisa -Italy T __ Dip. Ingegneria del Materiali - Universita di Trento -Italy Abstract A numerical approach aimed at evaluation of the stress-strain curve for metallic materials starting from the results of instrumented spherical indentation is presented. The spherical indentation process for materials having different a-e curves was modelled by means of a finite elements analysis. It was verified that the shape of the indentation crater depended upon the hardening properties of the materials. By means of proper use of these results, an iterative procedure was set up, which allows the a-e curve to be obtained with satisfactory accuracy for a large number of materials. Introduction When a small amount of material is available or destructive tes

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