Microstructure evolution and property analysis of commercial pure Al alloy processed by radial-shear rolling

• Autorzy: Gamin Yu. V. , Akopyan T. K. , Koshmin A. N. , Dolbachev A. P. , Goncharuk A. V.

Identyfikatory

DOI

10.1007/s43452-020-00143-w

• Języki publikacji: EN

Abstrakty

EN

The features of microstructure formation and properties of commercial pure aluminum alloy (Al 99.5%) obtained by radial-shear rolling (RSR) method at the different heating temperatures of 25, 200, 250, 300 and 350 °C were examined. In this paper, the rods with diameter of 14 mm were obtained from initial billet with diameter of 60 mm in five passes. The microstructure analysis with electron backscatter diffraction (EBSD), measurements of microhardness HV over cross-section, and tension test for determination of mechanical properties were carried out for these rods. The FEM simulation of RSR process and calculation of Zener–Hollomon parameter (Z) were carried out with Software QFORM. The obtained rods have the gradient microstructure typical of RSR characterized by surface layer with ultrafine grain structure (UFG) and grain size from 0.3 to 5 µm. In the central part of rod, the fiber deformed structure with minimal fraction of recrystallized grains (< 5%) is formed. This combination is optimal for simultaneous achievement of high strength (UTS ~ 107–110 MPa; YS ~ 100–109 MPa; ~ 35–40 HV) and ductility (El ~ 15–30%). The most intensive growth of plastic properties is observed at rolling temperatures close to the temperature of the onset of recrystallization, it is associated with additional deformational heating of surface layers and the formation of partially recrystallized structure. The obtained distribution dependences of average size of dynamic recrystallized grain on Zener–Hollomon parameter showed that the decrease in parameter Z leads to the increase in size of recrystallized grain for RSR process.

Słowa kluczowe

EN

aluminum alloys; radial-shear rolling; finite element modelling; dynamic recrystallization; Zener-Hollomon parameter; microstructure evolution

PL

stop aluminium; walcowanie; modelowanie elementów skończonych; rekrystalizacja; mikrostruktura

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2020
• Tom: Vol. 20, no. 4
• Strony: 674--683
• Opis fizyczny: Bibliogr. 33 poz., rys., wykr.

Twórcy

autor

Gamin Yu. V.

• National University of Science and Technology “MISIS”, 4 Leninsky pr., Moscow 119049, Russia

autor

Akopyan T. K.

• National University of Science and Technology “MISIS”, 4 Leninsky pr., Moscow 119049, Russia
• Baikov Institute of Metallurgy and Materials Science, 49 Leninsky pr., Moscow 119991, Russia

autor

Koshmin A. N.

• National University of Science and Technology “MISIS”, 4 Leninsky pr., Moscow 119049, Russia

autor

Dolbachev A. P.

• National University of Science and Technology “MISIS”, 4 Leninsky pr., Moscow 119049, Russia

autor

Goncharuk A. V.

• National University of Science and Technology “MISIS”, 4 Leninsky pr., Moscow 119049, Russia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)