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| rdf:type
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| Description
| - High-purity cooper (99.99 pct) was processed by equal channel angular pressing (ECAP) at room temperature through a die with an angle of 105 degrees between the die channels. The samples were examined by transmission electron microscopy (TEM) and orientation imaging microscopy (OM) methods after one, four, and eight passes through the die. Between individual passes the pressed samples were rotated by 90 degrees in the same sense (route Bc). After the first pressing, TEM showed a sub-grain structure, which was elongated in the shearing direction. Corresponding OM data illustrated an inhomogeneous microstructure, in which band-like features were also aligned in the shearing direction. The lattice orientation in material varied from location to location. The boundary disorientation distribution determined from the OM data exhibited a peak at 2 degree to 5 degree, in agreement with a predominance of sub-grains in the microstructure. After four pressings, the microstructure data obtained by TEM and OM were mutually consistent. The disorientation data revealed a decrease in the population of 2 degree to 5 degree boundaries accompanied by an overall upward shift in the distribution. Two orientations were generally apparent in the texture, although specific orientations varied with location. Often the (111) orientation tended to align in the shear direction. After 8 ECAP passes, the grain size was reduced further to approx. 200 to 500 nm. The populations of high-angle boundaries (> 15 degrees) increased in the disorientation distribution. A texture characteristic of shear deformation of fcc metals became apparent, although the orientations and particular components varied with location. Micro-structural refinement during severe straining includes the development of large fractions of high angle boundaries.
- High-purity cooper (99.99 pct) was processed by equal channel angular pressing (ECAP) at room temperature through a die with an angle of 105 degrees between the die channels. The samples were examined by transmission electron microscopy (TEM) and orientation imaging microscopy (OM) methods after one, four, and eight passes through the die. Between individual passes the pressed samples were rotated by 90 degrees in the same sense (route Bc). After the first pressing, TEM showed a sub-grain structure, which was elongated in the shearing direction. Corresponding OM data illustrated an inhomogeneous microstructure, in which band-like features were also aligned in the shearing direction. The lattice orientation in material varied from location to location. The boundary disorientation distribution determined from the OM data exhibited a peak at 2 degree to 5 degree, in agreement with a predominance of sub-grains in the microstructure. After four pressings, the microstructure data obtained by TEM and OM were mutually consistent. The disorientation data revealed a decrease in the population of 2 degree to 5 degree boundaries accompanied by an overall upward shift in the distribution. Two orientations were generally apparent in the texture, although specific orientations varied with location. Often the (111) orientation tended to align in the shear direction. After 8 ECAP passes, the grain size was reduced further to approx. 200 to 500 nm. The populations of high-angle boundaries (> 15 degrees) increased in the disorientation distribution. A texture characteristic of shear deformation of fcc metals became apparent, although the orientations and particular components varied with location. Micro-structural refinement during severe straining includes the development of large fractions of high angle boundaries. (en)
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| Title
| - Grain refinement of a commercial pure cooper by Equal-Channel Angular Pressing.
- Grain refinement of a commercial pure cooper by Equal-Channel Angular Pressing. (en)
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| skos:prefLabel
| - Grain refinement of a commercial pure cooper by Equal-Channel Angular Pressing.
- Grain refinement of a commercial pure cooper by Equal-Channel Angular Pressing. (en)
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| skos:notation
| - RIV/61989100:27360/11:86081146!RIV12-GA0-27360___
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| http://linked.open...avai/predkladatel
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GA106/09/1598), Z(MSM6198910013)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/61989100:27360/11:86081146
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - mechanical properties; structure; cooper; ECAP (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Drápala, Jaromír
- Greger, Miroslav
- Snášel, Václav
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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| is http://linked.open...avai/riv/vysledek
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