[Kovove materialy - Metallic materials]
    Mon - January 25, 2021 - 15:47 No. of hits : 1227862 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 53 (2015), Issue 4

The effect of grain size on storage and distribution of defects at plastic deformation of polycrystalline FCC alloys based on copper
KONEVA, N. A., KOZLOV, E. V., TRISHKINA, L. I.
vol. 53 (2015), no. 4, pp. 207 - 211

Abstract
The defect structure forming during deformation of the fcc polycrystalline solid solution Cu-Al and Cu-Mn with different grain sizes (10–240 μm) was studied by TEM. Plastic deformation of the alloy samples was carried out in tension at rate of 2 𘚥 10–2 sec–1 at the temperatures of 293–573 K. The scalar dislocation density and its components (the density of geometrically necessary dislocations and the density of statistically stored dislocations), the size of dislocation cells and the curvature-torsion crystalline lattice were measured. Both the average parameters of all the samples and the local ones were determined at various distances from the grain boundaries. The study showed the presence of a hardened zone near the grain boundaries, the size of which decreases with a decreasing grain size.

Key words
alloys, polycrystal, grains, grain boundaries, deformation, defects

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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