Microstructure of ultrafine-grained Al produced by severe plastic deformation

• Autorzy: Rodak K. , Pawlicki J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The structure of Al subjected to severe plastic deformation by means of compression with oscillatory torsion and by combined method (compression followed by compression with oscillatory torsion) were investigated. Design/methodology/approach: Al samples were deformed at torsion frequency (f) changed from 0 Hz (compression) to 1.6 Hz under a constant torsion angle (α) ≈ 6° and compression speed (v)=0.1mm/s. For combined methods the samples were compressed for strain ε = 0.7 and next deformed at mentioned parameters of compression with oscillatory torsion. Structural investigations were conducted by using light microscopy (LM) and transmission electron microscopy (TEM). Findings: The structural analysis made by TEM shows that the processing by compression with oscillatory torsion ensures obtaining a structure (at selected parameters) with a mean grain size ≈ 1.6 µm. Combined methods of deformation lead to grain refinement to about ≈ 0.9µm moreover material with uniform ultra-fine grained (UFG) microstructure was obtained. Research limitations/implications: The understanding in refinement of Al 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. Originality/value: Oscillatory compression is a deformation procedure applied to achieve large strains. However there is no studies on evolution of the microstructures during deformation by using mentioned mode. This paper provides these information's.

Słowa kluczowe

EN

nanomaterials; Al; transmission electron microscopy; severe plastic deformation

PL

nanomateriały; aluminium; mikroskopia elektronowa prześwietleniowa; odkształcanie plastyczne

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2007
• Tom: Vol. 28, nr 7
• Strony: 409--412
• Opis fizyczny: Bibliogr. 15 poz., il., wykr.

Twórcy

autor

Rodak K.

autor

Pawlicki J.

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

Bibliografia

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