High-strain rate and low-temperature superplasticity of Fe-Mn-Si-Ni steel

Hyun Bin Jeong; Jin Young Lee; Ju Chan Jin; Hyung Jin Cho; Young Kook Lee

doi:10.1016/j.jallcom.2023.170536

High-strain rate and low-temperature superplasticity of Fe-Mn-Si-Ni steel

Hyun Bin Jeong, Jin Young Lee, Ju Chan Jin, Hyung Jin Cho, Young Kook Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Superplastic steels with high elongation above 300% are expected to be used to manufacture complex-shaped mechanical parts without joining. However, their practical application is difficult due to high energy consumption and low productivity caused by high deformation temperature and low strain rate. In the present study, we newly developed an Fe-Mn-Si-Ni steel, which exhibited superplasticity at a low temperature of 1023 K and a high strain rate of 1 × 10⁻¹ s⁻¹. This steel also had remarkable room-temperature tensile strength (∼1.3 GPa) and total elongation (38%) after a simulation of superplastic forming. The mechanism of excellent superplasticity is grain boundary sliding occurring at the boundaries of fine γ grains, whose coarsening was suppressed by both Fe₅(Mn,Ni)₃Si₂ and (Fe,Mn,Ni)₃Si precipitates.

Original language	English
Article number	170536
Journal	Journal of Alloys and Compounds
Volume	958
DOIs	https://doi.org/10.1016/j.jallcom.2023.170536
Publication status	Published - 2023 Oct 5

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jallcom.2023.170536

Cite this

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title = "High-strain rate and low-temperature superplasticity of Fe-Mn-Si-Ni steel",

abstract = "Superplastic steels with high elongation above 300% are expected to be used to manufacture complex-shaped mechanical parts without joining. However, their practical application is difficult due to high energy consumption and low productivity caused by high deformation temperature and low strain rate. In the present study, we newly developed an Fe-Mn-Si-Ni steel, which exhibited superplasticity at a low temperature of 1023 K and a high strain rate of 1 × 10−1 s−1. This steel also had remarkable room-temperature tensile strength (∼1.3 GPa) and total elongation (38%) after a simulation of superplastic forming. The mechanism of excellent superplasticity is grain boundary sliding occurring at the boundaries of fine γ grains, whose coarsening was suppressed by both Fe5(Mn,Ni)3Si2 and (Fe,Mn,Ni)3Si precipitates.",

keywords = "Grain boundary sliding, High-Mn alloy, High-strain rate superplasticity, Low-temperature superplasticity, Precipitate",

author = "Jeong, {Hyun Bin} and Lee, {Jin Young} and Jin, {Ju Chan} and Cho, {Hyung Jin} and Lee, {Young Kook}",

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T1 - High-strain rate and low-temperature superplasticity of Fe-Mn-Si-Ni steel

AU - Jeong, Hyun Bin

AU - Lee, Jin Young

AU - Jin, Ju Chan

AU - Cho, Hyung Jin

AU - Lee, Young Kook

PY - 2023/10/5

Y1 - 2023/10/5

N2 - Superplastic steels with high elongation above 300% are expected to be used to manufacture complex-shaped mechanical parts without joining. However, their practical application is difficult due to high energy consumption and low productivity caused by high deformation temperature and low strain rate. In the present study, we newly developed an Fe-Mn-Si-Ni steel, which exhibited superplasticity at a low temperature of 1023 K and a high strain rate of 1 × 10−1 s−1. This steel also had remarkable room-temperature tensile strength (∼1.3 GPa) and total elongation (38%) after a simulation of superplastic forming. The mechanism of excellent superplasticity is grain boundary sliding occurring at the boundaries of fine γ grains, whose coarsening was suppressed by both Fe5(Mn,Ni)3Si2 and (Fe,Mn,Ni)3Si precipitates.

AB - Superplastic steels with high elongation above 300% are expected to be used to manufacture complex-shaped mechanical parts without joining. However, their practical application is difficult due to high energy consumption and low productivity caused by high deformation temperature and low strain rate. In the present study, we newly developed an Fe-Mn-Si-Ni steel, which exhibited superplasticity at a low temperature of 1023 K and a high strain rate of 1 × 10−1 s−1. This steel also had remarkable room-temperature tensile strength (∼1.3 GPa) and total elongation (38%) after a simulation of superplastic forming. The mechanism of excellent superplasticity is grain boundary sliding occurring at the boundaries of fine γ grains, whose coarsening was suppressed by both Fe5(Mn,Ni)3Si2 and (Fe,Mn,Ni)3Si precipitates.

KW - Grain boundary sliding

KW - High-Mn alloy

KW - High-strain rate superplasticity

KW - Low-temperature superplasticity

KW - Precipitate

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DO - 10.1016/j.jallcom.2023.170536

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VL - 958

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 170536

ER -

High-strain rate and low-temperature superplasticity of Fe-Mn-Si-Ni steel

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

Access to Document

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