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Abstracts
Magnesium single crystals of purity (99.8 wt%) deformed to stage B on the work-hardening curve at the temperature of 293 K and at a strain rate of 10^{-3} s^{-1} were investigated. The modified Bridgman method was used to obtain the crystals of the preferred orientation of (0001)〈11\overline{2}0〉 as primary slip system. By using the method based on the experimental gradient matrix, the activity of slip systems was obtained in magnesium single crystals deformed to shear strain 1.2 γ, where well developed stage B of work hardening was observed. It was shown that primary (0001)〈11\overline{2}0〉 slip system was dominant in the whole investigated range of the examined deformation. The observation and analysis of etch pits on the {\overline{1}2\overline{1}0} plane showed the heterogeneous distribution of dislocations formed during deformation into walls of dislocations perpendicular to the (0001) slip plane. The suggested model of work hardening of magnesium single crystals, which is worth taking into consideration, shows the influence of the long-range stress field derivating from the groups of dislocations arranged in dislocation walls.
Discipline
- 81.40.Ef: Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
- 61.72.Lk: Linear defects: dislocations, disclinations
- 61.72.Ff: Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.)
- 61.72.Hh: Indirect evidence of dislocations and other defects (resistivity, slip, creep, strains, internal friction, EPR, NMR, etc.)
Journal
Year
Volume
Issue
Pages
528-531
Physical description
Dates
published
2012-09
Contributors
author
- AGH University of Science and Technology, Department of Metallic Materials and Nano-Engineering Faculty of Non-Ferrous Metals, al. A. Mickiewicza 30, 30-059 Cracow, Poland
author
- AGH University of Science and Technology, Department of Metallic Materials and Nano-Engineering Faculty of Non-Ferrous Metals, al. A. Mickiewicza 30, 30-059 Cracow, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv122z3p26kz