About oxide dispersion particles chemical compatibility with areas coherent dissipation/sub-grains of bcc-alloys in Fe - (Cr, V, Mo, W) systems
A concept of partial magnetic moments (PMM) of the iron atoms located in the first ч four coordination spheres (1÷4 CS) for bcc lattice have been introduced based on analysis of results obtained by quantum-mechanical calculations (QMC) for volume dependence of the average magnetic moment...
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University of Belgrade, Technical Faculty, Bor
2016-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600025U.pdf |
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| author | Udovsky A. Fabrichnaya O. |
| author_facet | Udovsky A. Fabrichnaya O. |
| author_sort | Udovsky A. |
| collection | DOAJ |
| description | A concept of partial magnetic moments (PMM) of the iron atoms located in the
first ч four coordination spheres (1÷4 CS) for bcc lattice have been
introduced based on analysis of results obtained by quantum-mechanical
calculations (QMC) for volume dependence of the average magnetic moment
ferromagnetic (FM) Fe. The values of these moments have been calculated for
pure bcc Fe and bcc - Fe-Cr alloys. This concept has been used to formulate
a three sub-lattice model for binary FM alloys of the Fe-M systems (M is an
alloying paramagnetic element). Physical reason for sign change dependence
of the short-range order and mixing enthalpy obtained by QMCs for Fe-(Cr, V)
bcc phases has been found. Using this model it has been predicted that
static displacements of Fe - atoms in alloy matrix increase with increasing
the of CS number and result in reducing of the area of coherent dissipation
(ACD) size with growth of the dimension factor (DF) in the Fe-(Cr, V, Mo, W)
systems in agreement with the X-ray experiments. It has been shown
theoretically that anisotropy of spin- density in bcc lattice Fe and DF in
binary Fe - (Cr, V, Mo, W) systems is main factor for origins of
segregations on small angle boundaries of ACD and sub-grains boundaries To
prevent the coagulation of both ACD and sub-grains, and to increase the
strength of alloys, it is advisable to add oxide dispersion particles into
ferrite steel taking into account their chemical compatibility and coherent
interfacing with the crystalline lattice of a ferrite matrix. Application of
phase diagrams for binary and ternary the Fe-(Y, Zr)-O systems to verify
chemical compatibility of oxide dispersion particles with ferrite matrix
have been discussed |
| format | Article |
| id | doaj-art-2e08cdd4aa854e15b05d66aad4d5c9af |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-2e08cdd4aa854e15b05d66aad4d5c9af2025-02-02T14:35:29ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752016-01-0152218518810.2298/JMMB151112025U1450-53391600025UAbout oxide dispersion particles chemical compatibility with areas coherent dissipation/sub-grains of bcc-alloys in Fe - (Cr, V, Mo, W) systemsUdovsky A.0Fabrichnaya O.1Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia + National Research Nuclear University «MEPhI», Moscow, RussiaTechnical University of Mining Academy, Freiberg, GermanyA concept of partial magnetic moments (PMM) of the iron atoms located in the first ч four coordination spheres (1÷4 CS) for bcc lattice have been introduced based on analysis of results obtained by quantum-mechanical calculations (QMC) for volume dependence of the average magnetic moment ferromagnetic (FM) Fe. The values of these moments have been calculated for pure bcc Fe and bcc - Fe-Cr alloys. This concept has been used to formulate a three sub-lattice model for binary FM alloys of the Fe-M systems (M is an alloying paramagnetic element). Physical reason for sign change dependence of the short-range order and mixing enthalpy obtained by QMCs for Fe-(Cr, V) bcc phases has been found. Using this model it has been predicted that static displacements of Fe - atoms in alloy matrix increase with increasing the of CS number and result in reducing of the area of coherent dissipation (ACD) size with growth of the dimension factor (DF) in the Fe-(Cr, V, Mo, W) systems in agreement with the X-ray experiments. It has been shown theoretically that anisotropy of spin- density in bcc lattice Fe and DF in binary Fe - (Cr, V, Mo, W) systems is main factor for origins of segregations on small angle boundaries of ACD and sub-grains boundaries To prevent the coagulation of both ACD and sub-grains, and to increase the strength of alloys, it is advisable to add oxide dispersion particles into ferrite steel taking into account their chemical compatibility and coherent interfacing with the crystalline lattice of a ferrite matrix. Application of phase diagrams for binary and ternary the Fe-(Y, Zr)-O systems to verify chemical compatibility of oxide dispersion particles with ferrite matrix have been discussedhttp://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600025U.pdfanisotropy of spin-densityferritic steelsdimension factorsegregations on grain borderschemical compatibilityphase diagramscoherency oxide segregations and bcc-matrixFe-Cr-(Mo,W)Fe-Y-OFe-Zr-O |
| spellingShingle | Udovsky A. Fabrichnaya O. About oxide dispersion particles chemical compatibility with areas coherent dissipation/sub-grains of bcc-alloys in Fe - (Cr, V, Mo, W) systems Journal of Mining and Metallurgy. Section B: Metallurgy anisotropy of spin-density ferritic steels dimension factor segregations on grain borders chemical compatibility phase diagrams coherency oxide segregations and bcc-matrix Fe-Cr-(Mo,W) Fe-Y-O Fe-Zr-O |
| title | About oxide dispersion particles chemical compatibility with areas coherent dissipation/sub-grains of bcc-alloys in Fe - (Cr, V, Mo, W) systems |
| title_full | About oxide dispersion particles chemical compatibility with areas coherent dissipation/sub-grains of bcc-alloys in Fe - (Cr, V, Mo, W) systems |
| title_fullStr | About oxide dispersion particles chemical compatibility with areas coherent dissipation/sub-grains of bcc-alloys in Fe - (Cr, V, Mo, W) systems |
| title_full_unstemmed | About oxide dispersion particles chemical compatibility with areas coherent dissipation/sub-grains of bcc-alloys in Fe - (Cr, V, Mo, W) systems |
| title_short | About oxide dispersion particles chemical compatibility with areas coherent dissipation/sub-grains of bcc-alloys in Fe - (Cr, V, Mo, W) systems |
| title_sort | about oxide dispersion particles chemical compatibility with areas coherent dissipation sub grains of bcc alloys in fe cr v mo w systems |
| topic | anisotropy of spin-density ferritic steels dimension factor segregations on grain borders chemical compatibility phase diagrams coherency oxide segregations and bcc-matrix Fe-Cr-(Mo,W) Fe-Y-O Fe-Zr-O |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2016/1450-53391600025U.pdf |
| work_keys_str_mv | AT udovskya aboutoxidedispersionparticleschemicalcompatibilitywithareascoherentdissipationsubgrainsofbccalloysinfecrvmowsystems AT fabrichnayao aboutoxidedispersionparticleschemicalcompatibilitywithareascoherentdissipationsubgrainsofbccalloysinfecrvmowsystems |