Radiation-induced dissolution of Ni3 M intermetallic particles (M = Ti, Al, Zr) in displacement cascades in Fe-Ni-M alloys irradiated by neutrons at 340 K

Сагарадзе, В. В.; Шабашов, В. А.; Литвинов, А. В.; Koloskov, Valerie M.; Пархоменко, В. Д.

doi:10.1134/s0031918x1005008x

Cited by 8 publications

(11 citation statements)

References 5 publications

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“…Experimental data on the effect of the diffusion mobility and activity of chemical elements on the kinetics of mechanosynthesis, confirm an idea on the dual nature of the mechanism of mechanical alloying, namely, as concurrent competitive evolvement of the deformation-induced dissolution and precipitation of intermetallics. For analysis of the structure-phase transitions upon megaplastic deformation, we conducted experiments on the intense irradiation effect of electrons and neutrons [14,17,19,20,53,[55][56][57]. Such a comparison is explained by a specific feature common to both deformation and irradiation, namely, by a feature of saturation of the structure with mobile point defects.…”

Section: The Effect Of the Activity Of Chemical Elements On The Kinetmentioning

confidence: 99%

“…Such a comparison is explained by a specific feature common to both deformation and irradiation, namely, by a feature of saturation of the structure with mobile point defects. Earlier, the irradiation-induced dissolution of particles of the intermetallic γ phase was revealed on the Fe-Ni-(Ti, Al, Si, Zr) alloys, in the cascades of atomic displacements, upon irradiation of the alloys by fast neutrons [55][56][57]. The critical size of intermetallic particles was established, at which an active dissolution takes place and which is determined by its commensurability with the dimensions of the cascades of atomic displacements [55].…”

Section: The Effect Of the Activity Of Chemical Elements On The Kinetmentioning

confidence: 99%

“…To estimate the contribution from the formation of intermetallics to the kinetics of phase transformations, we performed an irradiation by electrons at 420 K of the alloys, disordered as a result of their deformation [16]. As when irradiating Fe-Ni-(Ti, Al, Si) alloys by fast neutrons, as when deforming, there takes place dissolution and precipitation of intermetallics [14,17,57]. One has a right to suppose that the efficiency of dissolution of intermetallics in the alloy with silicon is a consequence of the weak activity of concurrent aging.…”

Section: The Effect Of the Activity Of Chemical Elements On The Kinetmentioning

confidence: 99%

“…Apart from this, the effect of the deformation on the preliminarily aged steels and alloys was studied. As the main method of structural investigations, transmission Mössbauer spectroscopy was used which makes it possible to analyze the structure and atomic redistribution in iron alloys at the local level of the nearest neighborhoods (1-2 coordination shells) of the resonant 57 Fe.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: The Effect Of the Activity Of Chemical Elements On The Kinetmentioning

confidence: 99%

Section: The Effect Of the Activity Of Chemical Elements On The Kinetmentioning

confidence: 99%

Section: The Effect Of the Activity Of Chemical Elements On The Kinetmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Atomic Order and Submicrostructure in Iron Alloys at Megaplastic Deformation

Шабашов

Сагарадзе

Козлов

et al. 2018

Metals

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“…It follows from the mutual determinative factor of severe deformation and irradiation effects on structural phase transitions, namely, saturation of a structure by point defects. At the same time, it should be taken into consideration that processes of defect development in conditions of deformation and irradiation are of different natures [1][2][3]. The most crucial point in structural influences caused by deformation and irradiation is a high-energy dissipation behavior towards dynamic structural phase transitions [3,4].…”

Section: Introductionmentioning

confidence: 99%

Deformation–Induced Mechanical Synthesis of U and Fe

Kozlov,

Shabashov,

Kataeva

et al. 2023

Metals

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The phase composition of metallic α-U and Fe after mechanical synthesis in conditions of severe (mega) plastic deformation at room temperature using rotational Bridgman anvils was studied using Mössbauer spectroscopy, scanning and transmission electron microscopy. It was shown that mechanical synthesis results in U6Fe and UFe2 intermetallic formation with a precursor represented by UFe2(D) and UFe3(D) defective phases and a defective dispersed mechanical mixture of iron and uranium. Low-level annealing at 300 °C results in the ordering of the defective phases and transition of a dispersed mechanical mixture of iron and uranium into U6Fe and UFe2 intermetallics. The diffusion mechanism of intermetallic formation in conditions of cold deformation of iron and uranium mixture was established, and the high deformation and thermal phase stability of intermetallics U6Fe and UFe2 was shown.

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High-entropy alloys for nuclear applications

Chakraborty,

Tewari

2024

J Mater Sci

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High-entropy alloys (HEAs) because of their attractive properties, provide a unique opportunity to develop materials suitable for structural applications in the harsh environment (high-temperature and intense irradiation) prevailing in Gen IV nuclear power reactors. HEAs based on refractory elements (RHEAs) can display excellent stability at high temperatures and superior irradiation resistance due to the BCC-based structures obtained in most alloys. In this regard, the design and development of RHEAs based on the ZrNbVTiAl system have been actively pursued at BARC. Detailed characterization of microstructure and mechanical properties of these alloys having equiatomic and non-equiatomic compositions have been carried out. The study revealed the possibility of attaining significantly higher strengths up to 1.25 GPa and excellent fabricability as a result of dynamic recrystallization at high temperatures. In addition, the dissolution of AlZr-type intermetallics was observed after proton irradiation which helped in bringing the system towards a single-phase BCC structure.

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Radiation-induced dissolution of Ni3 M intermetallic particles (M = Ti, Al, Zr) in displacement cascades in Fe-Ni-M alloys irradiated by neutrons at 340 K

Cited by 8 publications

References 5 publications

Atomic Order and Submicrostructure in Iron Alloys at Megaplastic Deformation

Atomic Order and Submicrostructure in Iron Alloys at Megaplastic Deformation

Deformation–Induced Mechanical Synthesis of U and Fe

High-entropy alloys for nuclear applications

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