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- Title
Influence of screw extrusion on the atomic order in constructional steel.
- Authors
Samoilenko, Z.; Ivakhnenko, N.; Pushenko, E.; Pashinskaya, E.; Varyukhin, V.; Zavdoveev, A.
- Abstract
The atomic order in low-carbon steel strained by screw extrusion making the microstructure finer and changing the phase ratio in the material is studied by X-ray diffraction analysis. The steel is found to consist of multiscale structural fractions: a finely crystalline (300-600 Å) α-Fe matrix, nanodimensional (180-250 Å) FeC and FeSi or FeSi phases, and a fraction with randomly arranged atoms. A second-order order-disorder phase transition is revealed with order prevailing in the longitudinal (|) section of the samples and disorder prevailing in their cross (⊥) section. Sets of 'extended' and 'compressed' planes are found to coexist in the structure for the first time, with extended planes prevailing in the (|) section and compressed planes prevailing in the (⊥) one.
- Subjects
MILD steel; METAL extrusion; SCREWS; MICROSTRUCTURE; X-ray diffraction; CRYSTAL structure; PHASE transitions
- Publication
Technical Physics, 2013, Vol 58, Issue 7, p1011
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784213070189