Processing of Copper by Hydrostatic Extrusion – Studies of Microstructure and Properties

• Autorzy: Leszczyńska-Madej B. , Richert M. W. , Nejman I. , Zawadzka P.

Identyfikatory

DOI

10.1515/amm-2016-0257

• Języki publikacji: EN

Abstrakty

EN

The present study attempts to apply HE to 99.99% pure copper. The microstructure of the samples was investigated by both light microscopy and scanning transmission electron microscopy (STEM). Additionally, the microhardness was measured, the tensile test was made, and statistical analysis of the grains and subgrains was performed. Based on Kikuchi diffraction patterns, misorientation was determined. The obtained results show that microstructure of copper deformed by hydrostatic extrusion (HE) is rather inhomogeneous. The regions strongly deformed with high dislocation density exist near cells and grains/subgrains free of dislocations. The measurements of the grain size have revealed that the sample with an initial in annealed-state grain size of about 250 μm had this grain size reduced to below 0.35μm when it was deformed by HE to the strain ε=2.91. The microhardness and UTS are stable within the whole investigated range of deformation.

Słowa kluczowe

EN

HE; ultra-fine grained copper; microstructure characterization; mechanical properties

• 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: 2016
• Tom: Vol. 61, iss. 3
• Strony: 1575--1580
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Leszczyńska-Madej B.

• AGH University of Science and Technology, Faculty of Non Ferrous Metals, Department of Materials Science and Non – Ferrous Metals Engineering, Al. Mickiewicza 30, Kraków, Poland

autor

Richert M. W.

• AGH University of Science and Technology, Faculty of Non Ferrous Metals, Department of Materials Science and Non – Ferrous Metals Engineering, Al. Mickiewicza 30, Kraków, Poland

autor

Nejman I.

• AGH University of Science and Technology, Faculty of Non Ferrous Metals, Department of Materials Science and Non – Ferrous Metals Engineering, Al. Mickiewicza 30, Kraków, Poland

autor

Zawadzka P.

• AGH University of Science and Technology, Faculty of Non Ferrous Metals, Department of Materials Science and Non – Ferrous Metals Engineering, Al. Mickiewicza 30, Kraków, Poland

Bibliografia

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Uwagi

EN

The financial support of the Polish State Committee for Scientific Research under the grant number 11.11.180.653 is kindly acknowledged. The authors would like to thank MSc Eng. Jacek Skiba from the Institute of High Pressure Physics of the Polish Academy of Sciences (UNTPRESS) for his help in the research.