Grain Refinement in AlMgSi alloy during cyclic extrusion - compression: experiment and modelling

• Autorzy: Richert M. , Petryk H. , Stupkiewicz S.

Warianty tytułu

PL

Rozdrobnienie ziarna w stopie AlMgSi podczas cyklicznego wyciskania - ściskającego: badania i modelowanie

• Języki publikacji: EN

Abstrakty

EN

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.

PL

W pracy przeprowadzono ilościową analizę wpływu dużych deformacji plastycznych w procesie cyklicznego wyciskania ściskającego (CWS) na rozdrobnienie mikrostruktury i umocnienie plastyczne w stopie AlMgSi. Przedstawiono wyniki eksperymentalne pokazujące, że uzyskano strukturę nanokrystaliczną o średniej grubości mikropasm i wielkości ziarn poniżej 100 nm. W części dotyczącej modelowania, ewolucje mikrostruktury opisano przy użyciu efektywnego odkształcenia plastycznego, którego akumulacja jest spowolniona wskutek zmian kierunku prędkości odkształcenia na odwrotny. Przeprowadzono symulacje numeryczne zachowania się stopu AlMgSi w procesie CWS oraz porównano uzyskane wyniki z danymi doświadczalnymi.

Słowa kluczowe

EN

modelling; microstructure; hardening; severe plastic deformation

PL

modelowanie; mikrostruktura; ściskanie; deformacja plastyczna

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2007
• Tom: Vol. 52, iss. 1
• Strony: 49--54
• Opis fizyczny: Bibliogr. 22 poz., rys.

Twórcy

autor

Richert M.

autor

Petryk H.

autor

Stupkiewicz S.

• AGH University of Science and Technology, 30-059 Kraków, Mickiewicza 30, Poland

Bibliografia

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