Deformation-Induced Dissolution and Precipitation of Nitrides in Austenite and Ferrite of a High-Nitrogen Stainless Steel

Шабашов, В. А.; Makarov, A. V.; Козлов, К. А.; Сагарадзе, В. В.; Заматовский, А. Е.; Волкова, Е. Г.; Luchko, S. N.

doi:10.1134/s0031918x18020096

Cited by 13 publications

(22 citation statements)

References 18 publications

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“…The possibilities to control and govern atomic redistribution by means of large plastic deformation have found further realization in the works on deformation-induced dissolution and precipitation of disperse interstitial phases in austenitic and ferritic steels [10][11][12][21][22][23]32,33].…”

Section: The Formation Of Submicrostructure In High-nitrogen Fe-cr-n mentioning

confidence: 99%

“…To investigate the effect of the temperature of the megaplastic deformation in Bridgman anvils on the structure of nitrogen-and carbon-supersaturated steels Fe 71.2 Cr 22.7 Mn 1.3 N 4.8 , at %, [22,23] and Fe 64.7 Ni 33.6 C 1.7 , at %, [19,22], we employed the methods of Mössbauer spectroscopy and electron microscopy.…”

Section: The Effect Of Deformation Temperature On the Dissolution Andmentioning

confidence: 99%

“…The appearance of the works refs. [5,[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] on the induced dissolution of disperse particles, formation of supersaturated solid solutions, and dynamical aging, namely, accelerated ordering and decomposition with the formation of secondary phases that strengthen a metallic matrix, has enabled a development in studies on deformation-induced nanostructuring and mechanosynthesis. So, the effect of the conditions of mechanical activation on the mechanism of transformations and on the final modified structure of steels and alloys has been elucidated.…”

Section: Introductionmentioning

confidence: 99%

“…An attempt to compare the cases of deformation action and irradiation by high-energy elementary particles is explained by the generation in both cases of mobile point defects, namely, vacancies and interstitial atoms. The participation of point defects was analyzed at the initial stages of the (i) phase transformations in the form of the processes of the formation and destruction of short-range clustering in binary Fe-(Mn, Cr, Ni) iron alloys [18][19][20], of (ii) the formation and decomposition of the solid solutions of ferritic and austenitic Fe-(Mn, Cr, Ni)-N and Fe-Ni-C steels, supersaturated by nitrogen and carbon [10][11][12]19,[21][22][23], as well as of (iii) the dissolution and precipitation of intermetallic particles in ageing Fe-Ni-(Ti, Al, Si, Zr) alloys [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…To execute large plastic deformation and to control the conditions of the experiment, along with practically important external actions, such as milling in a ball mill (BM) [9][10][11], frictioning at friction treatment [21,32,33], and reducing at rolling [15], the high pressure torsion (HPT) method (of pressure torsion) in Bridgman anvils [12][13][14][15][16][17][18][19][20][21]23] was used. The method of HPT permits (i) the creation of high degrees of true deformation (ε~ 9) without the failure of samples and (ii) the control of the degree, rate, and temperature of deformation.…”

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 Formation Of Submicrostructure In High-nitrogen Fe-cr-n mentioning

confidence: 99%

Section: The Effect Of Deformation Temperature On the Dissolution Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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Improved Microstructure and Mechanical Properties of Fe-Cr-Mo-V-N Steel by Controlling the Quenching Temperature

Zheng

Yuan²,

Yang

2021

J. of Materi Eng and Perform

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Nitrogen is an alloying element that can significantly improve the yield strength of steel by means of interstitial solid solution strengthening. The effects of quenching temperature on the evolution of second phase and grain size were investigated, as well as tensile properties, impact energy and hardness of a new nitrogen-alloyed Fe-Cr-Mo-V-N steel. The results show that with the increase of quenching temperature, the number and size of the second phase decrease as the high temperature promotes the dissolution and refinement of the second phase. For instance, the number of second phase M 23 C 6 particles decreases gradually with temperature increasing. When the quenching temperature reaches 1050 °C, the grain is refined. Under the same tempering treatment, with the increase of quenching temperature, the tensile properties, impact energy and hardness increase first and then decrease. When the quenching temperature is 1050 °C and the tempering temperature is 180 °C, the obtained mechanical properties are the best. Under this condition, the tensile strength at room temperature is 2110 MPa, the yield strength is 1620 MPa, and the impact energy is 29.1 J, respectively.

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