On the nature of high-strength state of carbon steel produced by severe plastic deformation

Ганеев, А. В.; Karavaeva, M. V.; Sauvage, Xavier; Courtois-Manara, Eglantine; Ivanisenko, Yulia; Valiev, Ruslan Z.

doi:10.1088/1757-899x/63/1/012128

Cited by 13 publications

(12 citation statements)

References 4 publications

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“…For instance, during SPD processing of carbon steels, in addition to grain refinement, dissolution of cementite particles has been discovered [10,11], as well as formation of segregations of carbon and cementite particles at the boundaries of nanocrystalline grains formed through deformation [12][13][14][15][16]. This provides an opportunity to realize a set of strengthening mechanisms in UFG carbon steels; in particular, in addition to the grain boundary strengthening mechanism, also the dislocation strengthening, precipitate strengthening and solid solution strengthening mechanisms [12,15], as well as the new strengthening mechanism associated with solute segregation at grain boundaries [15,16], make their contributions. Such a superposition of the strengthening mechanisms allows to enhance considerably the strength of carbon steels [12,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…This provides an opportunity to realize a set of strengthening mechanisms in UFG carbon steels; in particular, in addition to the grain boundary strengthening mechanism, also the dislocation strengthening, precipitate strengthening and solid solution strengthening mechanisms [12,15], as well as the new strengthening mechanism associated with solute segregation at grain boundaries [15,16], make their contributions. Such a superposition of the strengthening mechanisms allows to enhance considerably the strength of carbon steels [12,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Superior strength of carbon steel with an ultrafine-grained microstructure and its enhanced thermal stability

et al. 2015

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The paper presents the results of a study on the microstructure and mechanical properties of a mediumcarbon steel (0.45 % C) processed by severe plastic deformation (SPD) via high-pressure torsion (HPT). Martensite quenching was first applied to the material, and then HPT processing was conducted at a temperature of 350°C. As a result, a nanocomposite type microstructure is formed: an ultrafine-grained (UFG) ferrite matrix with fine cementite particles located predominantly at the boundaries of ferrite grains. The processed steel is characterized by a high-strength state, with an ultimate tensile strength over 2500 MPa. Special attention is given to analysis of the thermal stability of the microstructure and properties of the steel after HPT processing in comparison with quenching. It is shown that the thermal stability of the UFG structure produced by HPT is visibly higher than that of quenchinginduced martensite. The origin of the enhanced strength and thermal stability of the UFG steel is discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superior strength of carbon steel with an ultrafine-grained microstructure and its enhanced thermal stability

et al. 2015

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“…Varying SPD parameters one can purposefully form the targeted features in the produced UFG materials and put into action the corresponding strengthening mechanisms. In UFG materials produced by SPD, strengthening can be achieved due to several mechanisms [1][2][3][4][5][6][7]23]:…”

Section: Discussionmentioning

confidence: 99%

“…Severe plastic deformation (SPD) processing significantly improves the mechanical properties of a broad range of metallic materials due to the formation of an ultrafine-grained (UFG) structure, ensuring the concurrent action of several mechanisms of strengthening thanks to the hardening contributions of solid solution, precipitations and particles, defect structures and, primarily, grain refinement [1][2][3][4][5][6][7]. A high-strength state is provided by controlling the microstructural parameters that are sensitive to SPD processing regimes.…”

Section: Introductionmentioning

confidence: 99%

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Superior Strength of Austenitic Steel Produced by Combined Processing, including Equal-Channel Angular Pressing and Rolling

Karavaeva

Abramova

Enikeev

et al. 2016

Metals

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Enhancement in the strength of austenitic steels with a small content of carbon can be achieved by a limited number of methods, among which is ultrafine-grained (UFG) structure formation. This method is especially efficient with the use of severe plastic deformation (SPD) processing, which significantly increases the contribution of grain-boundary strengthening, and also involves a combination of the other strengthening factors (work hardening, twins, etc.). In this paper, we demonstrate that the use of SPD processing combined with conventional methods of deformation treatment of metals, such as rolling, may lead to additional strengthening of UFG steel.In the presented paper we analyze the microstructure and mechanical properties of the Cr-Ni stainless austenitic steel after a combined deformation. We report on substantial increases in the strength properties of this steel, resulting from a consecutive application of SPD processing via equal-channel angular pressing and rolling at a temperature of 400 • C. This combined loading yields a strength more than 1.5 times higher than those produced by either of these two techniques used separately.

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Nanostructured Low Carbon Steels Obtained from the Martensitic State via Severe Plastic Deformation, Precipitation, Recovery, and Recrystallization

et al. 2018

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The range of accessible microstructures from the combination of severe plastic deformation (SPD) and heat treatments of a low carbon steel martensite under various processing conditions is evaluated. SPD results in a temperature decrease for recrystallization and austenitization upon subsequent annealing. On the contrary, the precipitation of cementite takes place at higher temperatures after SPD. Whereas, a certain thermal stability is observed for subsequent processing, even low annealing temperatures have a strong impact on the results of simultaneous SPD and heat treatments which results from the differences of dynamic and static recovery. It is shown that with each processing sequence unique microstructures can be produced that have to be taken into account in order to produce a material with optimized tailored properties.

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On the nature of high-strength state of carbon steel produced by severe plastic deformation

Cited by 13 publications

References 4 publications

Superior strength of carbon steel with an ultrafine-grained microstructure and its enhanced thermal stability

Superior strength of carbon steel with an ultrafine-grained microstructure and its enhanced thermal stability

Superior Strength of Austenitic Steel Produced by Combined Processing, including Equal-Channel Angular Pressing and Rolling

Nanostructured Low Carbon Steels Obtained from the Martensitic State via Severe Plastic Deformation, Precipitation, Recovery, and Recrystallization

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