Enhancement of the tensile properties and impact toughness of a medium-Mn steel through the homogeneous microstrain distribution

Dutta, Aniruddha; Park, Tak Min; Nam, Jae Hoon; Lee, Sang In; Hwang, Byoungchul; Choi, Won Seok; Sandlöbes, Stefanie; Ponge, Dirk; Han, Jeongho

doi:10.1016/j.matchar.2021.110992

Cited by 17 publications

(16 citation statements)

References 47 publications

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“…However, the drop tower test requires large amounts of steel which may not be readily available as most medium Mn steels are still in a laboratory development stage. As a proxy, some researchers turn to Charpy V-notch impact tests to measure the impact energy of medium Mn steels [106,176,186]. However, it is difficult to conduct a Charpy impact test on sheet steel.…”

Section: Charpy V-notch Impact Energymentioning

confidence: 99%

A review of the processing, microstructure and property relationships in medium Mn steels

Kwok

Dye

2023

International Materials Reviews

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Medium Mn steels are an emerging class of 3rd generation advanced high-strength steels. These steels have received significant attention due to their high strengths, large ductilities and also lower cost compared to their predecessor high Mn Twinning Induced Plasticity (TWIP) steels. Additionally, medium Mn steels have been found to exhibit TWIP and/or Transformation Induced Plasticity (TRIP) effects which can be harnessed to give a high strain hardening rate. Many thermomechanical processing concepts in the literature have been developed, producing multiple microstructure types with differentmechanical properties. The present review therefore aims to summarise the current knowledge of medium Mn steel alloy design especially on the processing, microstructure and property relationships in medium Mn steels. It complements the review of Sun et al. [Physical metallurgy of medium-Mn advanced high-strength steels, Int Mater Rev. 2023.], written independently and in parallel, which focusses more on the phase interfaces and thermodynamics.

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Section: Charpy V-notch Impact Energymentioning

confidence: 99%

A review of the processing, microstructure and property relationships in medium Mn steels

Kwok

Dye

2023

International Materials Reviews

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“…Owing to the similar athermal α 0 microstructure, austenitized steel also exhibits a laminate morphology after intercritical annealing. [33,34] However, in the cold-rolled steel (Figure 1b 3 , b 4 ), the introduction of dislocations by cold working accelerates the recovery and recrystallization of the deformed α 0 matrix during annealing, [32] resulting in a globular (or equiaxed) morphology after annealing.…”

Section: Microstructural Morphologymentioning

confidence: 99%

A Critical Review on Medium‐Mn Steels: Mechanical Properties Governed by Microstructural Morphology

Han

2022

steel research int.

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Medium‐Mn steels have received significant attention from the steel industry as strong candidate materials for next‐generation advanced high‐strength steels. These steels can be manufactured by various routes, such as hot rolling plus annealing or cold rolling plus annealing, resulting in two different microstructural morphologies: laminate morphology or globular morphology with two‐phase microstructures. The resulting change in the microstructural morphology leads to a significant difference in the mechanical responses. For example, steel with a globular structure exhibits improved strength, toughness, and hydrogen embrittlement resistance compared to steel with a laminate morphology. The present review systematically summarizes the relationship between microstructural morphology and various mechanical responses to derive the optimal microstructural design concept for improved mechanical properties.

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“…[1][2][3][4] The excellent mechanical properties of MMS are mainly attributed to the transformation-induced plasticity (TRIP) effect caused by metastable austenite and coordinated deformation of ferrite during deformation. [5][6][7][8] Intercritical annealing (IA) as a typical heat-treatment process has been verified to enhance properties of MMS. Several endeavors have been conducted for improving the volume fraction of austenite with a suitable stability by optimizing the IA parameters.…”

Section: Introductionmentioning

confidence: 99%

Potential Significance of Low Tempering Treatment in Improving the Mechanical Properties of a Cold‐Rolled and Intercritical Annealed Medium Mn Steel

Zhang

Duan

Liu

et al. 2022

steel research int.

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Herein, the effect of tempering at 200 °C for 20 min on the mechanical properties of a cold-rolled and intercritical annealed medium Mn steel is investigated in this study. This effect is mainly dependent on the original annealing condition. For the sample annealed at a relatively low temperature (660 °C), the austenite stability of this sample is further improved significantly after tempering. Thus, the transformation-induced plasticity (TRIP) effect is severely inhibited during deformation, which leads to a decrease in the properties of the sample. By contrast, for the sample possessing suitable austenite fraction (%30%) and heterostructure, that is, the sample annealed at 680 °C for 10 min, the simultaneously increased strength and ductility are significantly intrigued by tempering treatment. Electron probe microanalysis and 3D atom probe results reveal that C concentration in austenite is increased due to the C repartition during tempering, which leads to the persistent TRIP effect in a broad strain range during tensile deformation. In addition, the heterogeneous-deformation-induced stress of the heterostructured sample is found to be obviously intensified by tempering treatment. Thus, an excellent strength plastic synergistic effect with a product of ultimate tensile strength and total elongation of approximately 70 GPa% is obtained in the tempered sample.

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Enhancement of the tensile properties and impact toughness of a medium-Mn steel through the homogeneous microstrain distribution

Cited by 17 publications

References 47 publications

A review of the processing, microstructure and property relationships in medium Mn steels

A review of the processing, microstructure and property relationships in medium Mn steels

A Critical Review on Medium‐Mn Steels: Mechanical Properties Governed by Microstructural Morphology

Potential Significance of Low Tempering Treatment in Improving the Mechanical Properties of a Cold‐Rolled and Intercritical Annealed Medium Mn Steel

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