Microstructure and mechanical properties of medium-carbon steel subjected to severe plastic deformation

Karavaeva, M. V.; Nurieva, S. K.; Zaripov, N. G.; Ганеев, А. В.; Valiev, Ruslan Z.

doi:10.1007/s11041-012-9473-8

Cited by 16 publications

(11 citation statements)

References 5 publications

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“…Before SPD processing the samples were water-quenched with preliminary heating at 800°C for 1 h. SPD processing was conducted by high-pressure torsion (HPT) at an elevated temperature of 350°C with a number of turns N = 5 and a pressure of P = 5 GPa [13,14]. The processing was performed on disk samples with a diameter of 10 mm and a thickness of 0.2 mm.…”

Section: Methodsmentioning

confidence: 99%

“…The reason for such a deviation is the complexity of microstructures from SPD processing, which is especially typical of multiphase materials. 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.…”

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: Methodsmentioning

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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“…Dobatkin et al deformed martensitic 0.14 wt% C and 0.1 wt% C‐B steels via equal‐channel angular pressing at 300 °C and proved the enhanced strength and more uniform microstructure after additional subsequent annealing as compared to the ferritic‐pearlitic counterparts as starting materials . Ganeev, Karavaeva et al investigated the deformation of martensitic 0.1 wt% C and 0.45 wt% C steels using HPT . A hardness increase as compared to the as‐quenched state and an ultimate tensile strength of 2.65 GPa was reported for 0.45 wt% C martensitic carbon steel after HPT deformation at 350 °C .…”

Section: Introductionmentioning

confidence: 99%

“…Ganeev, Karavaeva et al investigated the deformation of martensitic 0.1 wt% C and 0.45 wt% C steels using HPT . A hardness increase as compared to the as‐quenched state and an ultimate tensile strength of 2.65 GPa was reported for 0.45 wt% C martensitic carbon steel after HPT deformation at 350 °C . The effect of various deformation temperatures was only investigated in one of the studies and resulted in a maximum hardness of a 0.45 wt% C martensitic steel for a deformation temperature of 350 °C in the investigated temperature range from 300 to 450 °C .…”

Section: Introductionmentioning

confidence: 99%

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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“…The contribution of these constituents to strengthening is determined primarily by the deformation temperature. It has been shown [24,25] that at room temperature the dissolution of second-phase particles prevails, but as the deformation temperature is increased, precipitation is observed.…”

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confidence: 99%

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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Microstructure and mechanical properties of medium-carbon steel subjected to severe plastic deformation

Cited by 16 publications

References 5 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

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

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

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