The effect of reduced temperatures on microstructure development in tensile tested high-manganese steel

Kowalska, J.; Ryś, J.; Cios, Grzegorz; Bednarczyk, Wiktor

doi:10.1016/j.msea.2019.138406

Cited by 15 publications

(15 citation statements)

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“…Some of the hitherto investigations show that the SIP effect occurs when SFE exceeds 50 mJ/m 2 [12,15]. Moreover, it is suggested that, apart from the type of plastic processing and the temperature and degree of deformation [27][28][29], the orientation and size of austenite grains may also influence the occurrence of the phase transformations induced by deformation (e.g., [5,30,31]). A very good example in this regard is the study by Ma et al [32,33].…”

Section: Introductionmentioning

confidence: 99%

Complex Structural Effects in Deformed High-Manganese Steel

2021

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The research presented in this paper is part of a larger project concerning deformation behavior, microstructure and mechanical properties of high-manganese steels with different chemical compositions and processed under various conditions. The current investigation deals with the development of microstructure and crystallographic texture of Fe-21.2Mn-2.73Al-2.99Si steel deformed in tension until fracture at ambient temperature. The deformation process of the examined steel turned out to be complex and included not only dislocation slip and twinning but also strain induced phase transformations (γ → ε) and (γ → α′). The formation of ε-martensite with hexagonal structure was observed within the microstructure of the steel starting from the range of lower strains. With increasing deformation degree, the α′-martensite showing a cubic structure gradually began to form. Attempts have been made to explain the circumstances or conditions for the occurrence of the deformation mechanisms mentioned above and their impact on the mechanical properties. The obtained results indicate that the strength and plastic properties of the steel substantially exceed those of plain carbon steels. Since both, mechanical twinning and the strain-induced phase transformations took place during deformation, it seems that both types of deformation mechanisms contributed to an increase in the mechanical properties of the examined manganese steel.

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Section: Introductionmentioning

confidence: 99%

Complex Structural Effects in Deformed High-Manganese Steel

2021

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“…To determine n, the natural logarithm of both sides of Equation ( 7) is determined, resulting in Equation ( 9). InIn 1 1 À X S ¼ In0.693 þ nIn t t 0.5 (10) Figure 10 shows the relationships between ln(t/t 0.5 ) and lnln(1/(1ÀX S )). The value of n is determined by the slope of linear fitting curves.…”

Section: Static Recrystallizationmentioning

confidence: 99%

“…The main plastic deformation mechanisms are dislocation slip, mechanical twinning, and strain-induced phase transformation (such as twinning-induced plasticity and transformation-induced plasticity), which depends on stacking fault energy (SFE). [8][9][10][11][12] Scientific understanding of the recrystallization behavior (dynamic recrystallization [DRX] and static recrystallization [SRX]) is a prerequisite for material design and large-scale production in the industry.Recently, many studies have focused on the recrystallization behavior of microalloying high-manganese steels. [9,11,13] The study by Ezatpour et al [9] on the effect of microalloying elements V and Nb on the DRX behavior of high-manganese steel shows that Nb-bearing steel exhibits high peak stress due to the fine initial grains and NbC precipitates.…”

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confidence: 99%

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Recrystallization Behavior and Microstructure Evolution in High‐Manganese Austenitic Steel

Liu

Xiong

et al. 2021

steel research int.

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Natural gas has attracted increasing attention because it does not cause pollution and is low cost. Natural gas is usually transported or stored in cryogenic-temperature liquefied natural gas (LNG) applications such as pressure vessels and plumbing pipes. The essential requirements for the materials used for these applications are high strength and outstanding low-temperature toughness (Charpy impact toughness at À196 C). The traditional materials used for these applications are Ni-based invar alloys, 9Ni alloys, aluminum alloys, and austenitic steels. [1][2][3][4] Although these conventional cryogenic-temperature materials show excellent mechanical properties, they possess some disadvantages such as high cost, complex manufacturing process, and unstable service behavior. High-manganese austenitic steels have received increasing attention due to their promising potential for LNG applications. [5][6][7] High-manganese steels have high ductility, a combination of strength and toughness, low thermal expansion coefficient, and low cost. The main plastic deformation mechanisms are dislocation slip, mechanical twinning, and strain-induced phase transformation (such as twinning-induced plasticity and transformation-induced plasticity), which depends on stacking fault energy (SFE). [8][9][10][11][12] Scientific understanding of the recrystallization behavior (dynamic recrystallization [DRX] and static recrystallization [SRX]) is a prerequisite for material design and large-scale production in the industry.Recently, many studies have focused on the recrystallization behavior of microalloying high-manganese steels. [9,11,13] The study by Ezatpour et al. [9] on the effect of microalloying elements V and Nb on the DRX behavior of high-manganese steel shows that Nb-bearing steel exhibits high peak stress due to the fine initial grains and NbC precipitates. The dynamic recovery (DRV) is the main deformation mechanism during the work softening process. Gwon et al. [11] reported the hot deformation behavior of V microalloying high-manganese steel. The hot workability of high-manganese steel was decreased due to the addition of V. Finer grains in V microalloying high-manganese steel were obtained from rapid DRX kinetics. Llanos [13] proposed a model to predict the static-recrystallized grain size of high-manganese steel as a function of deformation conditions and alloy elements. The microstructure of high-manganese steel at room temperature is usually austenite. Many researchers have studied the recrystallization behavior of austenitic stainless steel. [14,15] The 304 austenitic stainless steel shows discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX) for low and high strain rates, respectively. The strain rate plays an important role in flow stress and the substructure. The studies focusing on the hot deformation behavior or recrystallization behavior of low-alloy steels show that the recrystallization kinetics and model are related to specific materials.

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“…As is well known, to improve wear resistance, the wear-resistant materials have undergone a process of evolution from white cast iron, high manganese steel, alloyed white cast iron such as nickel-hard cast iron, and high chromium cast iron (HCCI) to high speed steel (HSS) [6][7][8][9][10]. Furthermore, correspondingly, their reinforcing phases have experienced the development from Fe 3 C and M 7 C 3 to MC and M 2 C (M represents alloying elements such as Cr, Mo, V, Ni, and W) since, generally speaking, the wear resistance of materials is proportional to the hardness of the materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo Concentration on the Microstructure Evolution and Properties of High Boron Cast Steel

et al. 2020

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The microstructure evolution, mechanical properties, and tribological properties of high boron cast steel (HBCS) with various Mo concentrations are investigated. The results indicate that Mo addition can significantly modify the microstructure and enhance the comprehensive properties. With the increase of Mo concentration, borides change from the original fish-bone Fe-rich and Cr-rich M2B to dendritic Fe-rich M2B, blocky and cluster-like Cr-rich M2B, and grainy Mo-rich M2B. The hardness of HBCS increases gradually with the increase of Mo content due to the solid solution strengthening and the refinement of M2B. It can be found that all the samples exhibit quasi-cleavage, but the impact toughness increases firstly and reaches the maximum value when the concentration of Mo is 2.10 wt.%, which is the result of the dispersive distribution of M2B rather than the original fish-bone M2B. Subsequently, the impact toughness begins to decrease as the concentration of Mo further increases because of the extensive formation of grainy Mo-rich M2B at the grain boundary. Meanwhile, the wear results reveal that the average friction coefficient and wear ratio decrease with the increase of Mo content, and the wear mechanism changes from abrasive wear and adhesive wear to abrasive wear when the concentration of Mo exceeds 2.10 wt.%.

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The effect of reduced temperatures on microstructure development in tensile tested high-manganese steel

Cited by 15 publications

References 40 publications

Complex Structural Effects in Deformed High-Manganese Steel

Complex Structural Effects in Deformed High-Manganese Steel

Recrystallization Behavior and Microstructure Evolution in High‐Manganese Austenitic Steel

Effect of Mo Concentration on the Microstructure Evolution and Properties of High Boron Cast Steel

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