Application of X-ray Technique to Study the Structure of Ultrafine-Grained Ferritic/Martensitic Steel

Ситдиков, В. Д.; Исламгалиев, Р. К.; Nikitina, M. A.; Sitdikova, Gulnaz

doi:10.1007/s11665-019-04440-1

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…XRD analysis was also performed at the cross‐section of the disk using a high‐resolution Rigaku Ultima IV XRD system with Cu‐Kα radiation. The lattice parameter, the size of coherent scattering domains, and the average dislocation density were estimated based on the analysis of the XRD data described thoroughly in Stidikov et al [ 49 ] The phase content was quantified by means of Rietveld analysis. Differential scanning calorimetry was performed in a NETZSCH 404 differential thermal analyzer with a heating rate of °C min −1 within the temperature interval 200–900 °C in an argon atmosphere.…”

Section: Methodsmentioning

confidence: 99%

Structure and Mechanical Behavior of Al–Nb Hybrids Obtained by High‐Pressure‐Torsion‐Induced Diffusion Bonding and Subsequent Annealing

Korznikova

Nazarov

et al. 2020

Adv Eng Mater

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The main approach of mechanical consolidation of dissimilar metals consists in solid state joining of thin discs or powders by means of pressure‐assisted shear deformation. Prior to this research, most strongly dissimilar systems, such as Al–W and Al–Ti, were only bonded by means of mechanical alloying and subsequent powder compaction. Herein, pioneering experimental research on the one‐step synthesis of an Al–Nb composite by means of diffusion bonding through high‐pressure torsion that allows figuring out several unusual results is presented. The maximal microhardness value is revealed to locate in the middle radius area, decreasing at the sample edge. Formation of a small amount of Al3Nb intermetallic phase is detected at room temperature deformation, while its equilibrium formation normally occurs above 600 °C. Post‐deformational annealing at 400 °C results in the overall decrease of the microhardness value along with its growth on the sample edge. Annealing at 600 °C does not lead to any degradation of the mechanical characteristics by comparison to those after annealing at 400 °C. The obtained results are discussed and explained in frames of contribution of different factors to the strengthening and softening dynamics of the composite material.

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Section: Methodsmentioning

confidence: 99%

Structure and Mechanical Behavior of Al–Nb Hybrids Obtained by High‐Pressure‐Torsion‐Induced Diffusion Bonding and Subsequent Annealing

Korznikova

Nazarov

et al. 2020

Adv Eng Mater

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“…Вместе с тем новые возможности в направлении регулирования функциональных свойств металлов и сплавов открывает формирование ультрамелкозернистой (УМЗ) структуры методами интенсивной пластической деформации (ИПД) [7][8][9], в основе которых лежит применение больших деформаций сдвигом в условиях высоких давлений и относительно низких гомологических температур. Известно, что методами ИПД можно измельчить зерно до размеров менее 300 нм в различных металлах и сплавах [9; 10].…”

Section: Introductionunclassified

Thermal stability and corrosion resistance of ultrafine-grained high-entropy Fe30Ni30Mn30Cr10 alloy

Nesterov¹,

Фаррахов²,

Aubakirova³

et al. 2022

FMT

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One of the promising research areas developing in recent times in the materials science is the development and research of high-entropy alloys containing several metal elements with the concentration close to equiatomic. The interest to them is generated by the fact that such alloys demonstrate the improved mechanical and functional properties. Another promising area improving strength of metallic materials is grain refinement using the severe plastic deformation methods. This work uses both approaches to form an ultrafine-grained (UFG) structure in the high-entropy Fe30Ni30Mn30Cr10 alloy. The paper presents the structure, strength, thermal stability, and corrosion resistance of a high-entropy alloy subjected to the high pressure torsion (HPT). The study of the structure carried out by scanning electron microscopy showed that the application of the HPT deformation leads to the formation of an UFG structure with an average grain diameter less than 200 nm depending on temperature of HPT processing. Microhardness measuring and tensile tests at room temperature showed that after grain refinement, an increase in microhardness and ultimate tensile strength occurs in a high-entropy alloy, which is more than three times higher compared to the initial coarse-grained sample. At the same time, the UFG samples of a high-entropy alloy manifested thermal stability of microhardness after annealing up to temperature of 500 °С. The electrochemical tests carried out in an aqueous solution of 3.5 % NaCl at the temperature of 37 °С demonstrated a high corrosion resistance of the UFG high-entropy alloy.

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Unusual Rolling Texture in Ferritic/Martensitic Steel

Ситдиков

Исламгалиев

Sitdikova

et al. 2021

J. of Materi Eng and Perform

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This paper presents the results of studies on texture formation in ferritic/martensitic steel 12Cr-2W subjected to equal channel angular pressing, warm rolling, and additional heat treatment. X-ray diffraction analysis, transmission electron microscopy, and electron backscatter diffraction were used to study the structure. An unusual texture transition H {001} <110> fi L {0 11} <011> was observed for the first time during additional heat treatment of rolled ferritic/martensitic steel. A possibility of such texture transition is due to activation of twinning processes and increase of a number of boundaries with the coincidence site lattice relationships (the CSL boundaries).

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Application of X-ray Technique to Study the Structure of Ultrafine-Grained Ferritic/Martensitic Steel

Cited by 4 publications

References 40 publications

Structure and Mechanical Behavior of Al–Nb Hybrids Obtained by High‐Pressure‐Torsion‐Induced Diffusion Bonding and Subsequent Annealing

Structure and Mechanical Behavior of Al–Nb Hybrids Obtained by High‐Pressure‐Torsion‐Induced Diffusion Bonding and Subsequent Annealing

Thermal stability and corrosion resistance of ultrafine-grained high-entropy Fe30Ni30Mn30Cr10 alloy

Unusual Rolling Texture in Ferritic/Martensitic Steel

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