Study on aging strengthening of Fe-22Mn-0.6C-3.5Cu-0.3V high-manganese TWIP steel

YANG Jun; QIN Kui; OU Ping; WANG Hebin; LI Chengbo; WEI Chunhui; QIN Anting

doi:10.7513/j.issn.1004-7638.2025.06.016

Volume 46 Issue 6

Dec. 2025

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YANG Jun, QIN Kui, OU Ping, WANG Hebin, LI Chengbo, WEI Chunhui, QIN Anting. Study on aging strengthening of Fe-22Mn-0.6C-3.5Cu-0.3V high-manganese TWIP steel[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 131-137. doi: 10.7513/j.issn.1004-7638.2025.06.016

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YANG Jun, QIN Kui, OU Ping, WANG Hebin, LI Chengbo, WEI Chunhui, QIN Anting. Study on aging strengthening of Fe-22Mn-0.6C-3.5Cu-0.3V high-manganese TWIP steel[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 131-137. doi: 10.7513/j.issn.1004-7638.2025.06.016

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Study on aging strengthening of Fe-22Mn-0.6C-3.5Cu-0.3V high-manganese TWIP steel

doi: 10.7513/j.issn.1004-7638.2025.06.016

YANG Jun^{1, 2, 3
,},
QIN Kui¹,
OU Ping^{1, 2, 3
,
,},
WANG Hebin⁴,
LI Chengbo^{1, 2, 3},
WEI Chunhui¹,
QIN Anting¹

1.
School of Materials and Environment, Guangxi Minzu University, Nanning 530105, Guangxi, China
2.
Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization, Guangxi Minzu University, Nanning 530105, Guangxi, China
3.
Guangxi Colleges and Universities Key Laboratory of Environmental-friendly Materials and Ecological Restoration, Guangxi Minzu University, Nanning 530105, Guangxi, China
4.
School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China

More Information

Received Date: 2025-06-03
Accepted Date: 2025-07-24
Rev Recd Date: 2025-07-06

Available Online: 2025-12-31

Publish Date: 2025-12-31

Abstract

Abstract

Solid solution and aging treatment had been conducted on Fe-22Mn-0.6C-3.5Cu-0.3V high-manganese TWIP steel prepared by melting, and the precipitation behavior during aging as well as the associated strengthening mechanisms had been investigated. The results show that the matrix in both solid solution and aging-treated high-manganese TWIP steels is austenitic structure. After aging treatment, nano-sized Cu-rich phases and VC carbides precipitate in the austenitic matrix, both of them show a cube-on-cube orientation relationship with the matrix. The interface between Cu-rich phase and austenitic matrix is coherent, while the VC carbide is non-coherent. The tensile properties at room temperature indicates the precipitation of Cu-rich phase and VC carbide can significantly increase the yield strength of high-manganese TWIP steel. The yield strength of aging-treated steel is increased by 60.6% higher than that of solid solution-treated steel. The yield shear stress increment calculated based on the precipitation strengthening theory is good agreement with the experimental results. The strength contribution from dislocation shear strengthening mechanism of Cu-rich phase accounts for 60.8% of the increment, while that from dislocation bypass strengthening mechanism of VC carbide accounts for 39.2% of the increment.
- high-manganese TWIP steel,
- aging precipitation,
- tensile property,
- strengthening mechanism

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References(35)

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