High‐Temperature Tensile Properties and Deformation Behavior of Three As‐Cast High‐Manganese Steels

Shen, Yuh Chiang; Liu, Jianhua; Hao, Xin; Liu, Hongbo

doi:10.1002/srin.202000313

Cited by 8 publications

(3 citation statements)

References 41 publications

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“…How to control AlN precipitation has not yet reached to a consistent conclusion. Liu et al [12][13][14][15] have carried out a series of basic research on the microstructure and high temperature mechanical properties of TWIP steel, and counted the evolution of stored dislocation density and deformation twins, as well as their respective contributions to the strengthening and the work hardening. Xin et al 16) found that the dominant stable inclusion changed from MnO to Al 2 O 3 /MnS, MnS, and AlN with the increase of Al content from 0.002 to 2.1 mass% in the Fe-16Mn-Al-0.6C alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cooling Rate on the Inclusion Precipitation Behavior in Unidirectionally Solidified Fe–Mn–C–Al TWIP Alloys

Fan,

Hu,

Matsuura

2024

ISIJ Int.

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During the solidification process, the precipitation of inclusions is inevitable due to microsegregation, especially AlN and MnS in TWIP steel. In order to reasonably control the precipitation of inclusion, the cooling rate as an important factor in the casting process was studied through the unidirectional solidification experiments. The combined analyses using ASEM-EDS, EPMA and optical microscope revealed that the number density of precipitated inclusion decreased along the solidification direction with the decrease of the solid fraction. The number density of Al 2 O 3 , which existed in the liquid alloy was basically stable. On the contrary, the number density of MnS decreased and that of AlN increased with the increasing of cooling rate. Moreover, in the early stage of the solidification (f s <0.1), the order of Al concentration curve slope was 0.58 K/s >0.38 K/s >0.1 K/s due to the entrapment of precipitated AlN by the solid-liquid interface moving relatively fast. Temperature was the main factor to affect the AlN precipitation and the particles were precipitated at the early stage of the solidification process. AlN inclusions can become the core to form the composite particles and have the positive effect on fining grains.

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Section: Introductionmentioning

confidence: 99%

Effect of Cooling Rate on the Inclusion Precipitation Behavior in Unidirectionally Solidified Fe–Mn–C–Al TWIP Alloys

Fan,

Hu,

Matsuura

2024

ISIJ Int.

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“…Wan et al have established a physical constitutive model considering strain coupling for Fe–25Mn–10Al–1.46C [ 20 ]. Shen et al have investigated high-temperature tensile behavior of as-cast high-Mn steels through constitutive modeling using the Zener–Hollomon parameter [ 21 ]. However, most of the models have considered materials with specific chemical compositions.…”

Section: Introductionmentioning

confidence: 99%

Prediction of True Stress at Hot Deformation of High Manganese Steel by Artificial Neural Network Modeling

Churyumov

Kazakova

2023

Materials

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The development of new lightweight materials is required for the automotive industry to reduce the impact of carbon dioxide emissions on the environment. The lightweight, high-manganese steels are the prospective alloys for this purpose. Hot deformation is one of the stages of the production of steel. Hot deformation behavior is mainly determined by chemical composition and thermomechanical parameters. In the paper, an artificial neural network (ANN) model with high accuracy was constructed to describe the high Mn steel deformation behavior in dependence on the concentration of the alloying elements (C, Mn, Si, and Al), the deformation temperature, the strain rate, and the strain. The approval compression tests of the Fe–28Mn–8Al–1C were made at temperatures of 900–1150 °C and strain rates of 0.1–10 s−1 with an application of the Gleeble 3800 thermomechanical simulator. The ANN-based model showed high accuracy, and the low average relative error of calculation for both training (5.4%) and verification (7.5%) datasets supports the high accuracy of the built model. The hot deformation effective activation energy values for predicted (401 ± 5 kJ/mol) and experimental data (385 ± 22 kJ/mol) are in satisfactory accordance, which allows applying the model for the hot deformation analysis of the high-Mn steels with different concentrations of the main alloying elements.

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“…The influence of temperature, cooling rate, and strain rate on the high‐temperature ductility of alloys with 17 wt.‐% Mn and ≈0–9 wt.‐% Al has been investigated by Borman et al [ 33 ] Depending on governing mechanisms like segregation and precipitation there may be different trends for the parameter on their effect on ductility. The high‐temperature tensile properties of the three as‐cast high‐manganese steels with 21 wt.‐% Mn, 5–6 wt.‐% Al and 0.028, 0.28, and 0.64 wt.‐% C have been investigated by hot tensile and hot compression tests at different temperatures and strain rates by Shen et al [ 34 ] It was found that steels with a carbon content of 0.028 and 0.28 wt% have similar hot brittle temperature ranges, whereas the ductility of the steel improves with increasing temperatures for 0.64 wt.‐% C.…”

Section: Introductionmentioning

confidence: 99%

High‐Temperature Properties of High Mn Steel with Al, Si, and C

Wang¹,

Spitzer

2022

steel research int.

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In the automotive industry, greenhouse gas emission reduction and improvement of vehicle safety are the main goals. New materials are considered to contribute significantly to this aim. [1] In this respect steels combining both high strength and high ductility offer considerable benefits. Due to high strength, the sheet thickness can be reduced without loss of stability, thereby, a weight reduction is achieved. High ductility enlarges the degrees of freedom in the design of components. Furthermore, it yields high energy absorbing ability in a crash. A unique combination of high strength and ductility is provided by high manganese steel.The properties of high manganese steels result from different mechanisms, such as crystallographic slip, the transformation of metastable austenite to martensite (TRIP), [2] twinning (TWIP), [3,4] and nano size κ-carbide formation (TRIPLEX). [5] High Mn steel containing about 13 wt.-% Mn and up to 1.4 wt.-% C, first made by Sir Robert Abbott Hadfield in the 1880s, is famous for its high impact strength and resistance to abrasion. [6] By variation of the Mncontent from 5 to 30 wt.-% (medium to high Mn steels) and by alloying with Al, Si, and C the excellent mechanical properties of Mn steel can be further optimized and adjusted. The addition of Al and Si improves roomtemperature properties by adjusting stacking fault energy and it also reduces density. [5,7,8] Increasing C-content in a suitable range was found to increase both strength and ductility. [9] Microalloying with Ti, Nb, and V can be used to increase yield strength by precipitation hardening. [10] Thermomechanical treatment, e.g., by warm rolling at about 200 °C and subsequent annealing at 520-550 °C, adjusts deformation mechanisms and in this way the resulting properties. [11] Furthermore, properties can be adjusted by annealing, e.g., to control the carbide morphology. [12] Apart from the mechanical properties, various further aspects of high Mn steel properties have been investigated like crack formation mechanisms and the influence of hydrogen. [13][14][15][16] Hydrogen embrittlement and delayed fracture is a serious problem for certain highmanganese steels. Micro-segregation in high Mn steels can have a significant effect on the mechanical properties at ambient temperature. [17][18][19] Compared to fundamental aspects and the properties under application conditions, the behavior of high and medium Mn steels during production and processing has not found so much attention. The behavior during cold rolling has been investigated by Ofei et al. [20] The strain rate effect on the mechanical properties is important to adjust forming processes to the specific material and it is furthermore important for the crash performance in automotive applications. [21] For casting, [22][23][24][25][26] hot rolling, [27] and welding, [28,29] the hightemperature properties are of crucial importance and it is essential to ensure a sufficient quality in these process steps. High-temperature brittleness restricts the applicability of the con...

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High‐Temperature Tensile Properties and Deformation Behavior of Three As‐Cast High‐Manganese Steels

Cited by 8 publications

References 41 publications

Effect of Cooling Rate on the Inclusion Precipitation Behavior in Unidirectionally Solidified Fe–Mn–C–Al TWIP Alloys

Effect of Cooling Rate on the Inclusion Precipitation Behavior in Unidirectionally Solidified Fe–Mn–C–Al TWIP Alloys

Prediction of True Stress at Hot Deformation of High Manganese Steel by Artificial Neural Network Modeling

High‐Temperature Properties of High Mn Steel with Al, Si, and C

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