An Ultrastrong and Ductile Duplex Lightweight Steel with Dual-Nanoprecipitation

Menghao Zhang; Huihui Zhi; Ruizhe Wang; Xinlan Ye; Xiyue Li; Zihao Xu; Weijun Wang; Haifeng Wang; Yanjing Su

doi:10.3390/cryst15121019

An Ultrastrong and Ductile Duplex Lightweight Steel with Dual-Nanoprecipitation

Menghao Zhang
, Huihui Zhi
, Ruizhe Wang
, Xinlan Ye
, Xiyue Li
, Zihao Xu
, Weijun Wang
, Haifeng Wang
, Yanjing Su

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian
Chongqing Science and Technology Innovation Center of NPU
Queen Mary University of London
CAS - Hefei Institutes of Physical Sciences
Hefei Comprehensive National Science Center
University of Science and Technology Beijing

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

Abstract

In this study, a duplex lightweight steel with the compositions of Fe-30Mn-9Al-1C-1V-5Ni (wt.%) was designed, and its microstructure and mechanical properties were analyzed after simple rolling and heat treatment. The microstructure of duplex lightweight steel consists of austenite and B2 phases, with the dual-nanoprecipitation of L′1₂ type long-range ordered domains and VC carbides within the austenite. The steel exhibits an ultra-high strength-ductility combination, with a yield strength of 1316 ± 16 MPa, a tensile strength of 1458 ± 11 MPa, and a total elongation of 11.7 ± 1.2%. Its high strength is primarily attributed to hetero-deformation induced (HDI) strengthening, solid solution strengthening, and precipitation strengthening. Meanwhile, the substantial dislocation accumulation in both austenite and B2 phases, coupled with the HDI hardening from intense heterogeneous deformation near grain/phase boundaries, collectively confers the steel with excellent ductility.

Original language	English
Article number	1019
Journal	Crystals
Volume	15
Issue number	12
DOIs	https://doi.org/10.3390/cryst15121019
State	Published - Dec 2025

Keywords

lightweight steel
precipitation
strain hardening
strengthening

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10.3390/cryst15121019

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title = "An Ultrastrong and Ductile Duplex Lightweight Steel with Dual-Nanoprecipitation",

abstract = "In this study, a duplex lightweight steel with the compositions of Fe-30Mn-9Al-1C-1V-5Ni (wt.\%) was designed, and its microstructure and mechanical properties were analyzed after simple rolling and heat treatment. The microstructure of duplex lightweight steel consists of austenite and B2 phases, with the dual-nanoprecipitation of L′12 type long-range ordered domains and VC carbides within the austenite. The steel exhibits an ultra-high strength-ductility combination, with a yield strength of 1316 ± 16 MPa, a tensile strength of 1458 ± 11 MPa, and a total elongation of 11.7 ± 1.2\%. Its high strength is primarily attributed to hetero-deformation induced (HDI) strengthening, solid solution strengthening, and precipitation strengthening. Meanwhile, the substantial dislocation accumulation in both austenite and B2 phases, coupled with the HDI hardening from intense heterogeneous deformation near grain/phase boundaries, collectively confers the steel with excellent ductility.",

keywords = "lightweight steel, precipitation, strain hardening, strengthening",

author = "Menghao Zhang and Huihui Zhi and Ruizhe Wang and Xinlan Ye and Xiyue Li and Zihao Xu and Weijun Wang and Haifeng Wang and Yanjing Su",

note = "Publisher Copyright: {\textcopyright} 2025 by the authors.",

year = "2025",

month = dec,

doi = "10.3390/cryst15121019",

language = "英语",

volume = "15",

journal = "Crystals",

issn = "2073-4352",

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TY - JOUR

T1 - An Ultrastrong and Ductile Duplex Lightweight Steel with Dual-Nanoprecipitation

AU - Zhang, Menghao

AU - Zhi, Huihui

AU - Wang, Ruizhe

AU - Ye, Xinlan

AU - Li, Xiyue

AU - Xu, Zihao

AU - Wang, Weijun

AU - Wang, Haifeng

AU - Su, Yanjing

PY - 2025/12

Y1 - 2025/12

N2 - In this study, a duplex lightweight steel with the compositions of Fe-30Mn-9Al-1C-1V-5Ni (wt.%) was designed, and its microstructure and mechanical properties were analyzed after simple rolling and heat treatment. The microstructure of duplex lightweight steel consists of austenite and B2 phases, with the dual-nanoprecipitation of L′12 type long-range ordered domains and VC carbides within the austenite. The steel exhibits an ultra-high strength-ductility combination, with a yield strength of 1316 ± 16 MPa, a tensile strength of 1458 ± 11 MPa, and a total elongation of 11.7 ± 1.2%. Its high strength is primarily attributed to hetero-deformation induced (HDI) strengthening, solid solution strengthening, and precipitation strengthening. Meanwhile, the substantial dislocation accumulation in both austenite and B2 phases, coupled with the HDI hardening from intense heterogeneous deformation near grain/phase boundaries, collectively confers the steel with excellent ductility.

AB - In this study, a duplex lightweight steel with the compositions of Fe-30Mn-9Al-1C-1V-5Ni (wt.%) was designed, and its microstructure and mechanical properties were analyzed after simple rolling and heat treatment. The microstructure of duplex lightweight steel consists of austenite and B2 phases, with the dual-nanoprecipitation of L′12 type long-range ordered domains and VC carbides within the austenite. The steel exhibits an ultra-high strength-ductility combination, with a yield strength of 1316 ± 16 MPa, a tensile strength of 1458 ± 11 MPa, and a total elongation of 11.7 ± 1.2%. Its high strength is primarily attributed to hetero-deformation induced (HDI) strengthening, solid solution strengthening, and precipitation strengthening. Meanwhile, the substantial dislocation accumulation in both austenite and B2 phases, coupled with the HDI hardening from intense heterogeneous deformation near grain/phase boundaries, collectively confers the steel with excellent ductility.

KW - lightweight steel

KW - precipitation

KW - strain hardening

KW - strengthening

UR - https://www.scopus.com/pages/publications/105025762232

U2 - 10.3390/cryst15121019

DO - 10.3390/cryst15121019

M3 - 文章

AN - SCOPUS:105025762232

SN - 2073-4352

VL - 15

JO - Crystals

JF - Crystals

IS - 12

M1 - 1019

ER -

An Ultrastrong and Ductile Duplex Lightweight Steel with Dual-Nanoprecipitation

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