Influence of Mo–Nb–Ti additions and peak annealing temperature on the microstructure and mechanical properties of low alloy steels after ultrafast heating process

Hernandez-Duran, E.I.; Corallo, Luca; Ros-Yanez, T.; Castro-Cerda, F.M.; Petrov, Roumen H.

doi:10.1016/j.msea.2021.140928

Cited by 9 publications

(9 citation statements)

References 47 publications

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“…Pilot-scale installations for ultrafast heating applications are reported elsewhere [22,23]. The enhanced combination of mechanical properties in lean alloyed UFH steels is developed through the formation of fine-grained heterogeneous microstructures [8,[15][16][17][18]24,25]. The microstructural grain refinement reached in ultrafast heating experiments is related to several factors including (i) preferential nucleation of austenite [26,27] and interaction between ferrite recrystallization and austenite phase transformation [20,28]; (ii) pinning effect by undissolved cementite carbides [21]; (iii) restricted austenitic grain growth by the high heating rate employed [29].…”

Section: Introductionmentioning

confidence: 99%

“…The microstructural grain refinement reached in ultrafast heating experiments is related to several factors including (i) preferential nucleation of austenite [26,27] and interaction between ferrite recrystallization and austenite phase transformation [20,28]; (ii) pinning effect by undissolved cementite carbides [21]; (iii) restricted austenitic grain growth by the high heating rate employed [29]. Moreover, current research on this topic has confirmed that solute heterogeneities in austenite, produced due to the lack of time for homogenization during the annealing step, are responsible for the formation of a complex mixture of constituents upon cooling [15][16][17]24,30].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Different Annealing Strategies on the Microstructure Development and Mechanical Response of Austempered Steels

Durán

Corallo

Ros-Yanez

et al. 2021

Metals

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This study focuses on the effect of non-conventional annealing strategies on the microstructure and related mechanical properties of austempered steels. Multistep thermo-cycling (TC) and ultrafast heating (UFH) annealing were carried out and compared with the outcome obtained from a conventionally annealed (CA) 0.3C-2Mn-1.5Si steel. After the annealing path, steel samples were fast cooled and isothermally treated at 400 °C employing the same parameters. It was found that TC and UFH strategies produce an equivalent level of microstructural refinement. Nevertheless, the obtained microstructure via TC has not led to an improvement in the mechanical properties in comparison with the CA steel. On the other hand, the steel grade produced via a combination of ultrafast heating annealing and austempering exhibits enhanced ductility without decreasing the strength level with respect to TC and CA, giving the best strength–ductility balance among the studied steels. The outstanding mechanical response exhibited by the UFH steel is related to the formation of heterogeneous distribution of ferrite, bainite and retained austenite in proportions 0.09–0.78–0.14. The microstructural formation after UFH is discussed in terms of chemical heterogeneities in the parent austenite.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of Different Annealing Strategies on the Microstructure Development and Mechanical Response of Austempered Steels

Durán

Corallo

Ros-Yanez

et al. 2021

Metals

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“…A similar steel grade (0.2 wt. % C) was considered by Hernandez-Duran et al [57], who studied the effect of the same HR as that in [40] on the ferritic grain size, and the results, reported in Figure 2, show a similar refinement of ferritic grain size, with a reduction from 2 to 1.6 mm.…”

Section: Effect Of Ufh On Grain Sizementioning

confidence: 63%

“…In medium/low carbon steels, the application of UFH leads to a significant decrease in grain size due to the suppression of grain boundary movements, and thus the growth of austenite grains [52][53][54][55][56][57][58]. Figure 1 shows the prior austenite grain (PAG) size dependence of heating rate (HR) [40].…”

Section: Effect Of Ufh On Grain Sizementioning

confidence: 99%

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Ultrafast Heating Heat Treatment Effect on the Microstructure and Properties of Steels

Gaggiotti

Albini

Nunzio

et al. 2022

Metals

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The adoption of the ultrafast heating (UFH) process has gained much attention in the last few years, as the green energy and minimization of CO2 emissions are the main aspects of contemporary metal science and thermal treatment. The effect of ultrafast heating (UFH) treatment on carbon steels, non-oriented grain (NGO) electrical steels, and ferriticor austenitic stainless steels is reported in this review. The study highlights the effect of ultrarapid annealing on microstructure and textural evolution in relation to microstructural constituents, recrystallization temperatures, and its effect on mechanical properties. A strong influence of the UFH process was reported on grain size, promoting a refinement in terms of both prior austenite and ferrite grain size. Such an effect is more evident in medium–low carbon and NGO steels than that in ferritic/austenitic stainless steels. A comparison between conventional and ultrafast annealing on stainless steels shows a slight effect on the microstructure. On the other hand, an evident increase in uniform elongation was reported due to UFH. Textural evolution analysis shows the effect of UFH on the occurrence of the Goss component (which promotes magnetic properties), and the opposite with the recrystallization g-fiber. The recovery step during annealing plays an important role in determining textural features; the areas of higher energy content are the most suitable for the nucleation of the Goss component. As expected, the slow annealing process promoted equiaxed grains, whereas rapid heating promoted microstructures with elongated grains as a result of the cold deformation.

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Construction of a prediction model for properties of wear-resistant steel using industrial data based on machine learning approach

Gao,

Fan,

Xing

et al. 2024

J. Iron Steel Res. Int.

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Influence of Mo–Nb–Ti additions and peak annealing temperature on the microstructure and mechanical properties of low alloy steels after ultrafast heating process

Cited by 9 publications

References 47 publications

The Effect of Different Annealing Strategies on the Microstructure Development and Mechanical Response of Austempered Steels

The Effect of Different Annealing Strategies on the Microstructure Development and Mechanical Response of Austempered Steels

Ultrafast Heating Heat Treatment Effect on the Microstructure and Properties of Steels

Construction of a prediction model for properties of wear-resistant steel using industrial data based on machine learning approach

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