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Volume 12
Issue 10
10.3390/met12101554
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Article

Mechanism of Balanced Strength and Ductility in High-Strength Low-Alloy Steel

by
Yuzhi Zhu
1,
Yunke Jia
1,
Xiaohua Chen
2,
Yanlin Wang
1 and
Zidong Wang
1,*
1
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Metals 2022, 12(10), 1554; https://doi.org/10.3390/met12101554
Submission received: 22 July 2022 / Revised: 14 September 2022 / Accepted: 15 September 2022 / Published: 20 September 2022
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Nanocrystalline Metals)
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Abstract

A high-strength low-alloy steel with balanced strength and ductility was reported. A product of the strength and elongation (PSE) at a break of ~19 GPa% was obtained. The microstructure of the material was investigated by scanning electron microscopy, electron backscattered diffraction, and transmission electron microscopy methods. Phase transformation follows the K–S orientation relationships. Interconnecting structures generate due to the variant interactions within one prior austenite grain. The multi-phase microstructure containing both soft and hard phases contributes to good plasticity. The homogeneously distributed NbC nanoparticles make up the loss of strength ascribed to the soft retained austenite and keep the strength at an extremely high level.
Keywords: high-strength low-alloy steel; phase transformation; precipitation; TEM; EBSD high-strength low-alloy steel; phase transformation; precipitation; TEM; EBSD

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MDPI and ACS Style

Zhu, Y.; Jia, Y.; Chen, X.; Wang, Y.; Wang, Z. Mechanism of Balanced Strength and Ductility in High-Strength Low-Alloy Steel. Metals 2022, 12, 1554. https://doi.org/10.3390/met12101554

AMA Style

Zhu Y, Jia Y, Chen X, Wang Y, Wang Z. Mechanism of Balanced Strength and Ductility in High-Strength Low-Alloy Steel. Metals. 2022; 12(10):1554. https://doi.org/10.3390/met12101554

Chicago/Turabian Style

Zhu, Yuzhi, Yunke Jia, Xiaohua Chen, Yanlin Wang, and Zidong Wang. 2022. "Mechanism of Balanced Strength and Ductility in High-Strength Low-Alloy Steel" Metals 12, no. 10: 1554. https://doi.org/10.3390/met12101554

APA Style

Zhu, Y., Jia, Y., Chen, X., Wang, Y., & Wang, Z. (2022). Mechanism of Balanced Strength and Ductility in High-Strength Low-Alloy Steel. Metals, 12(10), 1554. https://doi.org/10.3390/met12101554

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