Effect of Different Hot Deformation Temperatures on the Microstructure and Mechanical Properties of High Al/Mn Lightweight Steel

Wang, F.; An, Zhiyong; Wang, S. T.; Ji, Pengfei; Li, B.; Qin, Jing; Zhang, X. Y.; Z., M.; Wang, Q. F.; Liu, R. P.

doi:10.1007/s11665-021-06462-0

Cited by 3 publications

(1 citation statement)

References 45 publications

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“…It has been reported that the β-NiAl precipitates are not sheared by dislocations due to its high hardness, and hence act as an effective barrier to dislocation movements, and nano-sized β-NiAl precipitates within the ferrite phase is observed to be slightly coarsened (up to ≈70 nm) with pileup of dislocations as compared to the low temperature at a strain of 0.3 and at temperature of 1423 K. [10] It has been found that two distinct characteristics of localized hardening and localized softening exhibit in all the deformation conditions, and it is proposed that the phenomenon is associated with the different deformation mechanism within the individual phases, interplay between dual precipitation during deformation, strain partitioning between the phases, and flow instabilities. [11,12] It is known that the as-solidified Fe-Cr-Ni-Al lightweight steel owns inhomogeneous dendritic microstructure with…”

Section: Introductionmentioning

confidence: 99%

Thermal Mechanical Behavior and Microstructure Characteristics of As‐Cast FeCrNiAl Steel

Cui,

Wang,

et al. 2024

steel research int.

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To find the suitable deformation temperature range for the as‐cast Fe–5.5Cr–5.5Ni–3.0Al–0.27C high‐strength lightweight steel, the thermal mechanical behavior and the dependent microstructure characteristics are studied to investigate the high‐temperature mechanical response of the steel. In the results, it is shown that the microstructure of the steel owns a dendrite framework consisting of the martensite dendrite and the interdendritic austenite, among which precipitations of NiAl, Ni3Al, and δ‐Fe are induced by high‐temperature deformation. The flow stress dependence of deformation temperature shows two different variation tendencies, corresponding to the varied deformation mechanisms of strain‐induced precipitation of second phases and δ‐Fe nucleation, and then resulting in different variation of dislocation density. It is found that a periodical fluctuation of flow stress appears as the alternative occurrence of first rise and then drop followed by drop and rise, and the phenomenon is inferred to be caused by local dynamic recrystallization in the dendrites and the neighboring interdendritic spacings.

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Section: Introductionmentioning

confidence: 99%

Thermal Mechanical Behavior and Microstructure Characteristics of As‐Cast FeCrNiAl Steel

Cui,

Wang,

et al. 2024

steel research int.

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Achieving superior strength and ductility combination in Fe–28Mn–8Al–1C low density steel by orthogonal rolling

Xiong

Luan

Zha

et al. 2023

Journal of Materials Research and Technology

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Austenite-Based Fe-Mn-Al-C Lightweight Steels: Research and Prospective

Ding

Liu

Cai

2022

Metals

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Fe-Mn-Al-C lightweight steels have been investigated intensely in the last a few years. There are basically four types of Fe-Mn-Al-C steels, ferritic, ferrite-based duplex/triplex (ferrite + austenite, ferrite + austenite + martensite), austenite-based duplex (ferrite + austenite), and single-austenitic. Among these steels, austenite-based lightweight steels generally exhibit high strength, good ductility, and outstanding weight reduction effects. Due to the addition of Al and high C content, κ’-carbide and κ-carbide are prone to form in the austenite grain interior and at grain boundaries of lightweight steels, respectively, and play critical roles in controlling the microstructures and mechanical properties of the steels. The microstructural evolution, strengthening mechanisms, and deformation behaviors of these lightweight steels are quite different from those of the mild conventional steels and TRIP/TWIP steels due to their high stacking fault energies. The relationship between the microstructures and mechanical properties has been widely investigated, and several deformation mechanisms have also been proposed for austenite-based lightweight steels. In this paper, the current research works are reviewed and the prospectives of the austenite-based Fe-Mn-Al-C lightweight steels are discussed.

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Effect of Different Hot Deformation Temperatures on the Microstructure and Mechanical Properties of High Al/Mn Lightweight Steel

Cited by 3 publications

References 45 publications

Thermal Mechanical Behavior and Microstructure Characteristics of As‐Cast FeCrNiAl Steel

Thermal Mechanical Behavior and Microstructure Characteristics of As‐Cast FeCrNiAl Steel

Achieving superior strength and ductility combination in Fe–28Mn–8Al–1C low density steel by orthogonal rolling

Austenite-Based Fe-Mn-Al-C Lightweight Steels: Research and Prospective

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