The effect of grain size and grain orientation on deformation twinning in a Fe–22wt.% Mn–0.6wt.% C TWIP steel

Gutiérrez-Urrutia, I.; Zaefferer, Stefan; Raabe, Dierk

doi:10.1016/j.msea.2010.02.041

Cited by 646 publications

(278 citation statements)

References 32 publications

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“…32) Among previous studies, special focus has been laid on the microstructure, which induces mechanical twinning in TWIP steels; however, a number of these studies have been performed by using electron microscopy. [26][27][28][29][30] According to these studies, the mechanical properties of the TWIP steels are associated with grain refinement and texture formation by twinning, and the microstructure or twinning is correlated with SFE. However, since the steels are composed of polycrystalline grains, in discussing the mechanical properties of the TWIP steels, it is important to consider the conditions under which twinning in the microstructure occurs.…”

Section: Characterization Of Evolution Of Microscopic Stress and Stramentioning

confidence: 99%

“…[1][2][3][4] As the mechanical properties of these steels are often related with the formation of mechanical twins by deformation, these steels are called twinning-induced plasticity (TWIP) steels. The mechanical properties, [5][6][7][8][9][10][11][12][13][14][15] deformation mechanisms associated with stacking fault energies (SFE), [16][17][18][19][20][21][22][23] the thermodynamic properties, 24,25) and the microstructure [26][27][28][29][30][31] of the TWIP steels have been extensively investigated. Since a stacking fault may act as an embryo of a twin, the SFE or the chemical composition of the alloying elements, such as manganese, carbon, silicon, and aluminum, is an important factor affecting the twinning processes caused by plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Evolution of Microscopic Stress and Strain in High-Manganese Twinning-Induced Plasticity Steel

et al. 2015

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Section: Characterization Of Evolution Of Microscopic Stress and Stramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of Evolution of Microscopic Stress and Strain in High-Manganese Twinning-Induced Plasticity Steel

et al. 2015

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“…Deformation twinning is strongly dependent on crystallographic grain orien-58 tation and the average grain size of the material [17,18]. However, only a few 59 studies have been conducted which investigate the influence of grain size on the 60 strain hardening and twinning behaviour in TWIP steels [19,18,20,21,22].…”

mentioning

confidence: 99%

“…However, only a few 59 studies have been conducted which investigate the influence of grain size on the 60 strain hardening and twinning behaviour in TWIP steels [19,18,20,21,22]. In a separate study, Gutierrez-Urrutia et al [18] found that grain refinement 72 within the micrometer range does not suppress deformation twinning, although 73 it does become more difficult and a reduction in twin area fraction occurs in Gutierrez-Urrutia et al [18] used an alloy with a low stacking fault energy 82 (∼24 mJ m −2 [23,24,25]), whereas Ueji et al…”

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confidence: 99%

The effect of grain size on the twin initiation stress in a TWIP steel

2015

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The influence of grain size on the twinning stress of an Fe-15Mn-2Al-2Si-0.7C twinning induced plasticity (TWIP) steel has been investigated. Five grain sizes were obtained using a combination of cold rolling and annealing. Electron backscatter diffraction (EBSD) analysis revealed that the material exhibited a typical cold rolled and annealed texture. Tensile testing showed the yield stress to increase with decreasing grain size, however, the ductility of the material was not substantially affected by a reduction in grain size. Cyclic tensile testing at sub-yield stresses indicated the accumulation of plastic strain with each cycle, consequently the nucleation stress for twinning was determined. The twin stress was found to increase with decreasing grain size. Furthermore, the amount of strain accumulated was greater in the coarser grain material. It is believed that this is due to a difference in the twin thickness, which is influenced by the initial grain size of the material. SEM and TEM analysis of the material deformed to 5 % strain revealed thinner primary twins in the fine grain material compared to the coarse grain. TEM examination also showed the dislocation arrangement is affected by the grain size. Furthermore, a larger fraction of stacking faults was observed in the coarse-grained material. It is concluded that the twin nucleation stress and also the thickness of the deformation twins in a TWIP steel, is influenced by the initial grain size of the material. In addition grain refinement results in a boost in strength and energy absorption capabilities in the material.

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“…The cold working properties of high Al steels are also quite profoundly affected by the texture and by the grain size [40][41]. Adequate choose of electropulsing processing parameters can tailor steels texture and grain size [42] in some cases.…”

Section: Discussionmentioning

confidence: 99%

Influence of κ-carbide interface structure on the formability of lightweight steels

Qin

2016

Materials & Design

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Abstractκ-carbide () in high aluminium (Al) steels is grown from austenite () via + or α+ ( represents ferrite), and is a lamellar structure. This work demonstrates that the formability of high Al lightweight steels is affected by the lattice misfit and interface shape between  and matrix. The cold workability can be improved by either to change the steel chemical constitution or to implement an electro-thermo-mechanical process. For ferrite-matrix-based high Al steel, electric-current promotes the spheroidization and refinement of  structure and reduces volume fraction of  phase. This retards the crack nucleation and propagation, and hence improves the materials formability. The observation is caused by a direct effect of electric-current rather than side effects.

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The effect of grain size and grain orientation on deformation twinning in a Fe–22wt.% Mn–0.6wt.% C TWIP steel

Cited by 646 publications

References 32 publications

Characterization of Evolution of Microscopic Stress and Strain in High-Manganese Twinning-Induced Plasticity Steel

Characterization of Evolution of Microscopic Stress and Strain in High-Manganese Twinning-Induced Plasticity Steel

The effect of grain size on the twin initiation stress in a TWIP steel

Influence of κ-carbide interface structure on the formability of lightweight steels

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