Effect of cold rolling on recrystallization and tensile behavior of a high-Mn steel

Yanushkevich, Zhanna; Belyakov, Andrey; Kaibyshev, Rustam; Haase, Christian; Molodov, Dmitri A.

doi:10.1016/j.matchar.2015.12.021

Cited by 74 publications

(57 citation statements)

References 39 publications

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“…The yield strength ( σ 0.2 ) is commonly related to the grain size ( D ) through Hall–Petch type relationship as shown in Figure a for the present steels along with other results for hot‐rolled high‐Mn steels . The yield strength of hot‐rolled steels can roughly be expressed as σ 0.2 = 200 + 300 D −0.5 in Figure a.…”

Section: Resultssupporting

confidence: 56%

Microstructure and Mechanical Properties of 18%Mn TWIP/TRIP Steels Processed by Warm or Hot Rolling

Belyakov

Kaibyshev

Torganchuk

2016

steel research int.

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Two Fe–18%Mn steels with carbon content of 0.4 or 0.6% C are hot rolled at 1150 °C with 60% reduction followed by thermo‐mechanical processing under conditions of warm or hot rolling at 500 or 1100 °C, respectively, with a reduction of 60%. The uniform microstructures consisting of equiaxed grains with an average size of 34 and 26 μm are produced by hot rolling in the Fe–18Mn–0.4 C and Fe–18Mn–0.6 C steels, respectively. In contrast, the warm rolling results in the deformation microstructures composed of pancaked grains elongated in the rolling direction with mean transverse grain sizes of 14 and 10 μm in the Fe–18Mn–0.4 C and Fe–18Mn–0.6 C steels, respectively. Both the hot and warm rolling improve the mechanical properties of the present steels. A decrease in the rolling temperature results in significant increase in the yield strength, which comprises 300–360 MPa after rolling at 1100 °C and 850–950 MPa after rolling at 500 °C, although the ultimate tensile strength does not increase substantially (1000 and 1300 MPa after hot and warm rolling, respectively). The steel with higher carbon content is characterized by somewhat higher strength after warm/hot rolling.

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Section: Resultssupporting

confidence: 56%

Microstructure and Mechanical Properties of 18%Mn TWIP/TRIP Steels Processed by Warm or Hot Rolling

Belyakov

Kaibyshev

Torganchuk

2016

steel research int.

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“…The values of σ 0 = 160 MPa and k y = 355 MPa µm 0.5 are obtained in the present study. Note here, almost the same σ 0 and k y have been reported in other papers on austenitic steels [13,[24][25][26].…”

Section: Mechanical Propertiessupporting

confidence: 89%

“…It is clearly seen that the dislocation strengthening can be expressed by Equation (4) with α = 0.6. The value of α has been reported varying from about 0.2 to 0.5 [14,15,24,[30][31][32]. Relatively large α = 0.6 obtained for the present work hardened steel samples may be attributed to an enhanced efficiency of dislocation strengthening in high-Mn austenitic steels with low SFE as well as to somewhat underestimated dislocation density by the KAM values, which are actually associated with excess dislocations of similar Burgers vectors rather than total dislocation density [33].…”

Section: Mechanical Propertiesmentioning

confidence: 48%

Microstructure and Mechanical Properties of a High-Mn TWIP Steel Subjected to Cold Rolling and Annealing

Kalinenko

Kusakin

Belyakov

et al. 2017

Metals

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Abstract:The structure-property relationship was studied in an Fe-18Mn-0.6C-1.5Al steel subjected to cold rolling to various total reductions from 20% to 80% and subsequent annealing for 30 min at temperatures of 673 to 973 K. The cold rolling resulted in significant strengthening of the steel. The hardness increased from 1900 to almost 6000 MPa after rolling reduction of 80%. Recovery of cold worked microstructure developed during annealing at temperatures of 673 and 773 K, resulting in slight softening, which did not exceed 0.2. On the other hand, static recrystallization readily developed in the cold rolled samples with total reductions above 20% during annealing at 873 and 973 K, leading to fractional softening of about 0.8. The recrystallized grain size depended on annealing temperature and rolling reduction; namely, it decreased with a decrease in the temperature and an increase in the rolling reduction. The mean recrystallized grain size from approximately 1 to 8 µm could be developed depending on the rolling/annealing conditions. The recovered and fine grained recrystallized steel samples were characterized by improved strength properties. The yield strength of the recovered, recrystallized, and partially recrystallized steel samples could be expressed by a unique relationship taking into account the fractional contributions from dislocation and grain size strengthening into overall strength.

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“…The least square method formally predicts the best fit of Eq. (4) 7,19,37,46) and 0.2-0.7 MPa m 0.5 for ferrite. 49) In the latter case, the maximal value of strengthening coefficient corresponds to upper saturation limit for steels with large interstitial content.…”

Section: (4)mentioning

confidence: 94%

“…7,19,32,43-46) For instance, K = 0.435 MPa 46) and concurrent grain size and dislocation strengthening of work hardened austenite, 45) respectively. As a result, the strength contribution from dislocation strengthening was apparently much larger than that from grain size strengthening.…”

Section: (4)mentioning

confidence: 99%

On Strengthening of Austenitic Stainless Steel by Large Strain Cold Working

et al. 2016

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Effect of cold rolling on recrystallization and tensile behavior of a high-Mn steel

Cited by 74 publications

References 39 publications

Microstructure and Mechanical Properties of 18%Mn TWIP/TRIP Steels Processed by Warm or Hot Rolling

Microstructure and Mechanical Properties of 18%Mn TWIP/TRIP Steels Processed by Warm or Hot Rolling

Microstructure and Mechanical Properties of a High-Mn TWIP Steel Subjected to Cold Rolling and Annealing

On Strengthening of Austenitic Stainless Steel by Large Strain Cold Working

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