Institute of Fundamental Technological Research
Polish Academy of Sciences

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M. Richert


Recent publications
1.  Richert M., Petryk H., Stupkiewicz S., Grain refinement in AlMgSi alloy during cyclic extrusion-compression: Experiment and modelling, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, Vol.52, pp.49-54, 2007

Abstract:
The effect of severe plastic deformation (SPD) during cyclic extrusion-compression (CEC) on grain refinement and strain hardening in AlMgSi alloy is studied quantitatively. New experimental results are presented showing that the average microband thickness and grain size decrease below 100 nm, i.e. a nanocrystalline material is obtained. In the modelling part, the decrease in size of dislocation cells and microbands is expressed in terms of the effective plastic strain defined such that strain rate reversals slow down its accumulation. Examples of simulation of the behaviour of AlMgSi alloy severely deformed by cyclic extrusion-compression are calculated and compared to experimental data.

Keywords:
Modelling, Microstructure, Hardening, Severe plastic deformation

Affiliations:
Richert M. - other affiliation
Petryk H. - IPPT PAN
Stupkiewicz S. - IPPT PAN

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