Microstructure and deformation behavior of the hot-rolled medium manganese steels with varying aluminum-content

Cai, Zhiping; Cai, Ban; Ding, Hua; Chen, Y.; Misra, R.D.K.

doi:10.1016/j.msea.2016.08.119

Cited by 36 publications

(17 citation statements)

References 33 publications

(40 reference statements)

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“…In addition, γ(α )+α layers show a higher capacity for crack arrest in cold-rolled 3Si samples. However, δ-ferrite was considered a soft phase in medium Mn steels [20,21], which contradicts the result of Sun et al Zhang et al [26] revealed that the propagation of cracks was slightly deflected when the cracks met the soft δ-ferrite phase. On the basis of these results, the influence of δ-ferrite resulting from the interaction of Si and Al on fracture behavior is not yet clear.Strain rate dependent TRIP effects, mechanical properties, and fracture behavior are vital factors during car crashes.…”

mentioning

confidence: 90%

“…It is known that C and Mn can stabilize austenite, whereas Al and Si can stabilize ferrite [17]. Apparently, the formation of δ-ferrite is promoted as the Al/Si content increases [19,20]. Sun et al [19] revealed that 3 wt.% Si added to 0.2C-10Mn-3Al-(0-3)Si steel resulted in a large fraction of δ-ferrite, while there was no δ-ferrite at the addition of 1 wt.% Si.…”

Section: Microstructurementioning

confidence: 99%

“…On the basis of the Hall-Petch equation, it is inferred that refinement strengthening is a major factor resulting in higher YS and UTS in 0Si than in 0.6Si. In addition, the presence of soft δ-ferrite can increase TEL of 0.6Si [20].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…In addition, plenty of coarse δ-ferrite could be gained at the addition of 3 wt.% Si, resulting in poor mechanical properties [19]. However, Cai et al [20] obtained the best TEL when the microstructure contained plenty of δ-ferrite, demonstrating that results from different studies are often controversial. Meanwhile, other researchers have shown that δ-ferrite can sustain more strain during deformation owing to the strain partitioning [21,22].…”

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confidence: 99%

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The Influence of Microstructure on the Mechanical Properties and Fracture Behavior of Medium Mn Steels at Different Strain Rates

Wang

2019

Materials

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The primary task of automotive industry materials is to guarantee passengers’ safety during a car crash. To simulate a car crash, the influence of strain rates on mechanical properties and fracture behavior of medium Mn steels with different Si content (0Si without δ-ferrite and 0.6Si with about 20% δ-ferrite) was conducted using the uniaxial tensile test. The results show that ultimate tensile strength is higher, whereas total elongation is lower in 0Si than in 0.6Si. As the strain rate increases, ultimate tensile strength and total elongation decrease in both 0Si and 0.6Si; nonetheless, total elongation of 0.6Si decreases faster. Meanwhile, the area reduction of 0.6Si increases as the strain rate increases. The microcrack′s number on a rolling direction (RD)-transverse direction (TD) surface is considerably increased; nonetheless, the microcrack′s size is restrained in 0.6Si compared with 0Si. Microcracks start at γ(α′)/α-ferrite interfaces in both 0Si and 0.6Si, whereas little nucleation sites have also been found at (γ(α′)+α-ferrite)/δ-ferrite boundaries in 0.6Si. Meanwhile, δ-ferrite reveals a higher capacity for microcrack arrest. As the strain rate decreases, increased lower crack growth results in fine and even dimples on fractographs with abundant second cracks on fractographs; meanwhile, the small microcrack′s number increases, while the large microcrack′s number decreases on an RD-TD surface.

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confidence: 90%

Section: Microstructurementioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

mentioning

confidence: 99%

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The Influence of Microstructure on the Mechanical Properties and Fracture Behavior of Medium Mn Steels at Different Strain Rates

Wang

2019

Materials

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“…7 Apart from that, the addition of Al also lowers density of this steel. 3 Si decreases the SFE and decreases the possibility of carbide precipitation. 8 It has been observed 7,8 that the conventional TWIP steel has Mn content in the range of 20–30 wt%, Al content nearly about 3 wt%, and Si content lies between 2 and 3 wt% with low carbon content to get desirable mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Deformation behaviour of low carbon high Mn twinning-induced plasticity steel

Tewary

Ghosh

Chatterjee

2017

Proceedings of the Institution of Mechanical Engineers, Part C:

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The present study deals with the deformation behaviour of low carbon and high manganese twinning-induced plasticity (TWIP) steel (Fe–21Mn–3Si–3Al–0.06C, wt%) through microstructural investigation. Low carbon with high manganese along with the addition of aluminium in TWIP steel results in lowering of specific weight with higher strain hardening due to the formation of mechanical twins during deformation. The full austenite phase is obtained after solution treatment and deformation twins appear and austenite grains become flattened during application of 10% to 50% cold deformation. The annealing twins are relatively coarser compared to the newly formed deformation twins. With the increasing amount of cold deformation, deformation twins and dislocation density are increased. Deformation twinning can be considered to be the dominant deformation mechanism during the course of cold rolling applied in the present study. The cold deformation results in the evolution of dislocation substructure, stacking faults, deformation twins and twin–dislocation interaction, which may be correlated with the lower stacking fault energy (∼24 mJ/m2) of the investigated steel. Excellent combination of strength and ductility has been obtained in the present TWIP steel with a small rolling reduction of 10% and 30%. With the increasing amount of cold deformation, tensile strength notably increases and maximum tensile strength is obtained at 50% cold-deformed sample along with the diminutive sacrifice of the ductility.

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Unveiling the Correlation among Microstructure, Texture, Slip System Activity, and Tensile Property in a Hot Rolled Ni Containing Medium‐Mn Steel

Kumar,

Ghosh,

Rakshit

et al. 2024

steel research int.

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The microstructure–texture–tensile property relationships in a Ni‐containing medium‐Mn steel (Ni‐MMS), subjected to limited thermomechanical processing steps (i.e., hot forging and hot rolling), have been established in this study. The microstructure of the specimens hot rolled (HR) at 1173 (HR‐1173K) and 1373 K (HR‐1373K) exhibits ferrite and austenite phases. The austenite phase fraction in the HR‐1173K specimen is found to be higher than the HR‐1373K condition. The volume fraction of austenite to martensite transformation during tensile testing is also observed to be higher in the HR‐1173K specimen (≈13%) than the HR‐1373K condition (≈2%). This suggests the occurrence of more efficient transformation‐induced plasticity effect in the HR‐1173K specimen in comparison to the HR‐1373K condition, resulting in improved strength–ductility synergy in the former specimen. The smaller grain size of both the phases and higher fraction of twin boundaries as well the evolution of higher intensity γ‐fiber <111>//ND in the HR‐1173K specimen leads to better tensile properties. In addition, the overall activation of the primary slip systems (combination of face‐centered cubic and body‐centered cubic phases slip system), estimated through visco‐plastic self‐consistent simulation, is higher in HR‐1173K specimens, resulting in improved strain hardening response as compared to HR‐1373K one.

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Microstructure and deformation behavior of the hot-rolled medium manganese steels with varying aluminum-content

Cited by 36 publications

References 33 publications

The Influence of Microstructure on the Mechanical Properties and Fracture Behavior of Medium Mn Steels at Different Strain Rates

The Influence of Microstructure on the Mechanical Properties and Fracture Behavior of Medium Mn Steels at Different Strain Rates

Deformation behaviour of low carbon high Mn twinning-induced plasticity steel

Unveiling the Correlation among Microstructure, Texture, Slip System Activity, and Tensile Property in a Hot Rolled Ni Containing Medium‐Mn Steel

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