Ultrafine grained Cu processed by compression with oscillatory torsion

• Autorzy: Rodak K.
• Konferencja: 12th International Scientific Conference CAM3S'2006, 27-30th November 2006, Gliwice-Zakopane
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this work is a study of Cu microstructure after severe plastic deformation process by using compression with oscillatory torsion test. Design/methodology/approach: Cu samples were deformed at torsion frequency (f) changed from 0 Hz (compression) to 1.8 Hz under a constant torsion angle (alpha) sim 8 degree and compression speed (v)=0.1 mm/s. Structural investigations were conducted by using light microscopy (LM) and transmission electron microscopy (TEM). Findings: The structural analysis made by TEM shows that the process lead to grain refinement by the reconstruction of the banded (laminar) structure, typical for conventional deformation (compression), into a subgrain structure. Deformation at lower (f) and higher (v) were the most effective in refining grains, while using higher (f) and lower (v) may be characterized as a recovered and coarsened structure. This method facilitates obtaining a submicrocrystalline structure with nanocrystalline elements localised in the shear bands' region. Research limitations/implications: The understanding in refinement of Cu structure could help to modify the process and design deformation parameters. Practical implications: The knowledge of the characteristic features of unconventionally deformed materials will provide the usefulness of the employed method to produce materials having the desirable functional properties.

Słowa kluczowe

EN

nanomaterials; Cu; copper; transmission electron microscopy; plastic deformation; severe plastic deformation

PL

nanomateriały; Cu; miedź; mikroskopia elektronowa transmisyjna; odkształcenie plastyczne; odkształcenie plastyczne duże

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 20, nr 1-2
• Strony: 491--494
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Rodak K.

• Department of Materials Science, Silesian University of Technology, ul. Krasińskiego 8, Katowice 40-019, Poland,

Bibliografia

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