Influences of Nb-microalloying on microstructure and mechanical properties of Fe–25Mn–3Si–3Al TWIP steel

Li, Dejun; Feng, Yaorong; Shi, Song; Liu, Qiang; Bai, Qiang; Wu, Gang; Lv, Neng; Ren, Fang

doi:10.1016/j.matdes.2015.06.092

Cited by 49 publications

(13 citation statements)

References 20 publications

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“…Similar results were reported by Li et al [5] studying another Nb-microalloyed TWIP steel after a sequence of heat treatments and cold rolling steps. For hypereutectic high chromium cast irons, Zhi et al [6] reported that the addition of Nb led to the formation of NbC carbide during the solidification, reducing the carbon content in the liquid, which in turn resulted in carbide refinement and changes in the morphology of the M 7 C 3 primary carbide, which became more isotropic.…”

Section: Introductionsupporting

confidence: 89%

Physical Properties of the NbC Carbide

Cuppari

Santos

2016

Metals

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Transition metal carbides are interesting materials with a singular combination of properties, such as high melting points, high hardness, good transport properties and relatively low costs, which makes them excellent candidates for several technological applications. The possible applications of NbC carbide remained unexplored as it was in the past expensive and available in limited volumes. In order to guide investigations of the applicability of NbC, a deeper understanding of the physical properties of this carbide is fundamental. In this review paper, key physical properties of NbC are compiled with emphasis on its chemical bonding, a careful description of the C-Nb phase diagram, the phases formed and the crystal structures. Thermal properties are discussed and correlated with the intrinsic and extrinsic features of NbC. Finally, elastic properties are discussed.

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Section: Introductionsupporting

confidence: 89%

Physical Properties of the NbC Carbide

Cuppari

Santos

2016

Metals

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“…It is well accepted that four stages can be defined according to the true strain dependency of work-hardening rate (dσ/dε) at the as-annealed condition during the tensile deformation [17,27]. The work-hardening rate drops pronouncedly according to the dynamic recovery of dislocations (stage I) [15,28,29]. Then, the primary ε-martensite initially nucleates and grows in stage II.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…A schematic sketch of microstructure evolution during warm rolling and tensile deformation (green, red and yellow colors denote austenite matrix, deformation twin and ε-martensite, respectively). Figure 11 shows the resultant yield stress-ductility combination of Fe-30Mn-4Si-2Al TRIP/TWIP steel by prior warm rolling, together with the data from references [10,15,16,29,[36][37][38][39][40][41]. First, previous reporting attempted to refine grain size to improve the yield stress by the conventional cold rolling and annealing treatment.…”

Section: The Effect Of Warm Rolling Reduction On Tensile Deformation mentioning

confidence: 99%

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The Influence of Warm Rolling Reduction on Microstructure Evolution, Tensile Deformation Mechanism and Mechanical Properties of an Fe-30Mn-4Si-2Al TRIP/TWIP Steel

Dong

Sun

Xia

et al. 2018

Metals

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The effects of warm rolling reduction ratio ranging from 20% to 55% on microstructure evolution, the tensile deformation mechanism, and the associated mechanical properties of an Fe-30Mn-4Si-2Al TRIP/TWIP steel were studied. The warm rolling process resulted in the formation and proliferation of sub-structure, comprising dislocations, deformation twins as well as shear bands, and the densities of dislocation and twins were raised along with the increase in rolling reduction. The investigated steel, with a fully recrystallized state, exhibited a single ε-TRIP effect during the room temperature tensile deformation, on top of dislocation glide. However, the formation and growth of twin lamellae and ε-martensite were detected simultaneously during tensile deformation of the warm rolled specimen with rolling reduction of 35%, leading to a good balance between high yield strength of 785 MPa, good total ductility of 44%, and high work hardening rate. As the rolling reduction increased to 55%, the specimen revealed a relatively low work hardening rate, due to the high dislocation density, and dislocation glide was the main deformation mechanism. As a result, a tensile deformation mechanism that started from a single ε-martensitic transformation moved to a bi-mode of ε-martensitic transformation accompanied with deformation twinning, and finally to dislocation glide with the increasing warm rolling reduction was proposed.

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“…[ 6 ] It can be enhanced using strategies to adjust the microstructure toward grain refinement, including hot and cold rolling, recrystallization treatment, precipitation hardening, and addition of microalloying elements. [ 7 ]…”

Section: Introductionmentioning

confidence: 99%

Influence of Nb as Microalloying Element on the Recovery and Recrystallization of Fe–25Mn–12Cr–C–N Twinning‐Induced Plasticity Steels

Sierra

Baracaldo

Roncery

et al. 2021

steel research int.

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The influence of Nb on the microstructure during annealing at 950, 1000, and 1100 °C is analyzed in two types of twinning‐induced plasticity (TWIP) steels, Fe–25Mn–12Cr–C–N (TWIP‐0) and Fe–25Mn–12Cr–C–N–Nb (TWIP‐Nb). The addition of Nb as a microalloying element affects various phenomena taking place during annealing, namely, recrystallization, grain coarsening, and recovery processes. Microstructural characterization is conducted via light microscopy, scanning electron microscopy, and electron back scattering diffraction (EBSD). Recovery takes place after annealing at 950 °C, where remaining deformation and grain nucleation can be seen. Microstructural analyses indicate that the location of the recrystallization nuclei in the recovered structure is associated with the local chemical segregation of Mn and Cr, which leads to differences in the driving force for the martensitic transformation at microscale, and therefore local deformation mechanisms. The presence of Nb as a microalloying element decelerates recovery and recrystallization kinetics. At 1100 °C/10 min, both steels exhibit complete recrystallization; moreover, abnormal grain growth starts.

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Influences of Nb-microalloying on microstructure and mechanical properties of Fe–25Mn–3Si–3Al TWIP steel

Cited by 49 publications

References 20 publications

Physical Properties of the NbC Carbide

Physical Properties of the NbC Carbide

The Influence of Warm Rolling Reduction on Microstructure Evolution, Tensile Deformation Mechanism and Mechanical Properties of an Fe-30Mn-4Si-2Al TRIP/TWIP Steel

Influence of Nb as Microalloying Element on the Recovery and Recrystallization of Fe–25Mn–12Cr–C–N Twinning‐Induced Plasticity Steels

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