Phase transformations in iron oxide–metal systems during intensive plastic deformation

Шабашов, В. А.; Литвинов, А. В.; Mukoseev, A. G.; Сагарадзе, В. В.; Desyatkov, D.V.; Pilyugin, V. P.; Sagaradze, I. V.; Вильданова, Н. Ф.

doi:10.1016/s0921-5093(03)00493-3

Cited by 11 publications

(13 citation statements)

References 10 publications

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“…The underlying processes explaining the differences are not yet clearly understood. The fragility of the oxide layer, the deterioration of its mechanical properties by raising the annealing temperature, coupled to dissolution and migration of the oxides in the metal matrix might be at the origin of these differences [15][16][17][18][19]. It is conceivable that the brittle oxides cannot accommodate the plastic strain during co-rolling at 550°C.…”

Section: Resultsmentioning

confidence: 99%

Effect of interfacial oxidation occurring during the duplex process combining surface nanocrystallisation and co-rolling

Waltz

Retraint

Roos

et al. 2011

Surface and Coatings Technology

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This paper presents an investigation of the interface quality of nanocristallised 316L stainless steel multilayer structures. They were produced by a duplex process, combining the Surface Mechanical Attrition Treatment (SMAT) and the co-rolling process at two different annealing temperatures (550°C and 650°C). Oxide layers were observed at the interfaces between the sheets and their morphology was characterised by optical microscopy. Their chemical composition was determined by Energy Dispersive X-ray spectrometry. The microstructure near the interfaces was analysed by Transmission Electron Microscopy (TEM). In the laminate co-rolled at 550°C, the presence of ultrafine grains was demonstrated. Additional tensile tests have shown an influence of the annealing temperature on the yield strength, as well as on the resistance of the interfaces of the co-rolled multilayer structures.

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Section: Resultsmentioning

confidence: 99%

Effect of interfacial oxidation occurring during the duplex process combining surface nanocrystallisation and co-rolling

Waltz

Retraint

Roos

et al. 2011

Surface and Coatings Technology

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“…Secondary phases (intermetallides, carbides, nitrides, oxides, and others) hamper the growth of grains and provide conditions for the formation of a thermally stable structure. The employment in the capacity of oxygen carriers of the low-stable oxides (Fe 2 O 3 , Fe 3 O 4 , and others) or low-stable nitrides (Fe 4 N, CrN, and others), which are easily dissolvable in the matrix of alloys at «cold» deformation under mechanical alloying, permits the development of novel advanced technologies for obtaining heat-resistant steels and alloys strengthened by special oxides (Y 2 O 3 , TiO 2 , and others) [9,31,58,59] and nitrides (Cr 2 N, TiN, AlN, and others) [5,10,11,14,33]. The surface layers modified by deformation-those of rubbing machine parts-can have increased wear resistance, which gives the opportunity to purposefully design new wear-resistant dispersion-hardenable materials with particles difficult to dissolve upon deformation.…”

Section: The Modification Of the Structure And Properties In Steel Wimentioning

confidence: 99%

“…In the present review the main attention has been paid to the results of our original investigations over the last five years on the phase transformations in iron alloys and steels induced by large plastic deformations. The authors of these works were initiators of the first studies on anomalous low-temperature phase transformations [24][25][26][27][28][29][30][31]. Analysis of the effect of the temperature and rate of large plastic deformation on the mechanism of phase transformations, as well as a comparison with the case of irradiation action, has become a specific feature of these works [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Atomic Order and Submicrostructure in Iron Alloys at Megaplastic Deformation

Шабашов

Сагарадзе

Козлов

et al. 2018

Metals

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The subject of the present review consists of summing up our previous results on the study of the relaxation of structure along the way (i) of atomic redistribution—in the form of short-range clustering in binary iron alloys—induced by megaplastic deformation (i.e., of super large value), and (ii) of the dissolution and precipitation of disperse nitrides and carbides in steels and intermetallics in ageing alloys. Within the capacity of the main method of executing megaplastic deformation, along with the practically important milling in ball mills and friction-providing external action, we employed high pressure torsion (HPT) in Bridgman anvils, which permitted the control of the degree, rate, and temperature of deformation action. At the local level of two nearest neighbors (one or two coordination shells in relation to an iron atom) we studied atomic mass transfer, stipulated by generation of a large number of point defects of deformation origin, and conducted a comparison with a case of irradiation by high-energy electrons. We established a change in the direction of phase transformations, as well as anomalous acceleration of the ordering and precipitation of disperse phases upon altering the temperature (T < 0.3Tmelt) and rate of deformation (from 2 × 10−2 to 8 × 10−2 s−1). We also demonstrated the possibility of regulating the ultra-fine-grained structure with solid–solution strengthening and dispersion hardening.

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“…[4][5][6][7][8][9][10]. One classical example of severe plastic deformation of two phase alloys can be seen in well known pearlite wire that is widely used as suspension cables, tire cords and fishing wires.…”

Section: Introductionmentioning

confidence: 99%

Complementary use of transmission electron microscopy and atom probe tomography for the investigation of steels nanostructured by severe plastic deformation

Sauvage

Lefebvre²,

Genevois³

et al. 2009

Scripta Materialia

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The properties of bulk nanostructured materials are often controlled by atomic scale features like segregation along defects or composition gradients. Here we discuss about the complimentary use of TEM and APT to obtain a full description of nanostructures. The advantages and limitations of both techniques are highlighted on the basis of experimental data collected in severely deformed steels with a special emphasis on carbon spatial distribution.

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Phase transformations in iron oxide–metal systems during intensive plastic deformation

Cited by 11 publications

References 10 publications

Effect of interfacial oxidation occurring during the duplex process combining surface nanocrystallisation and co-rolling

Effect of interfacial oxidation occurring during the duplex process combining surface nanocrystallisation and co-rolling

Atomic Order and Submicrostructure in Iron Alloys at Megaplastic Deformation

Complementary use of transmission electron microscopy and atom probe tomography for the investigation of steels nanostructured by severe plastic deformation

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