An ultra-high-strength 12Mn maraging steel realized via nanoscale heterostructure engineering

Yang，Mujin1,2; Huang，Chao2,5; Yao，Zhifu2,5; Yang，Zhijie2,5; Li，Zhou3; Wang，Cuiping4; Wu，Haichen6; Yang，Tao7; Zhao，Yilu2; Wang，Shuai1; Liu，Xingjun2,5,8

2023-10-15

10.1016/j.matlet.2023.134770

Materials Letters   Impact Factor & Quartile

0167-577X

1873-4979

A 12Mn maraging steel Fe-12Mn-5Co-1Ti-1Mo-1Si, strengthened by the Heusler FeTiSi phase, was designed with nanoscale heterostructures. When aged at 450 °C, fine FeTiSi particles uniformly precipitate within the martensite lath, contributing as the main strengthening phase. At the same time, a nanoscale austenite layer was observed to grow at the lath interface, significantly toughening the martensite lath matrix. With this hierarchical nano-structure, the super-high tensile strength of ∼1700 MPa with good elongation of ∼7 % at break was achieved. Our case uncovers that hierarchical nanoscale heterogeneous microstructure could pave a new path to achieve synergistic improvement of strength and ductility.

Fe2TiSi phase Maraging steels Microstructure Nano-austenite layer Particle, nanosize

SCI

English

First

National Natural Science Foundation of China[51971082];

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:001031427900001

ELSEVIER

MATERIALS SCIENCE

2-s2.0-85163220369

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen,518055,China
3.College of Artificial Intelligence and Big Data for Medical Science,Shandong First Medical University & Shandong Academy of Medical Sciences,Jinan,250117,China
4.College of Materials and Fujian Provincial Key Laboratory of Materials Genome,Xiamen University,Xiamen,361005,China
5.Institute of Materials Genome and Big Data,Harbin Institute of Technology,Shenzhen,518055,China
6.Test Center,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China
7.Department of Materials Science and Engineering,City University of Hong Kong,Hong Kong,Hong Kong
8.State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Shenzhen,518055,China

Yang，Mujin,Huang，Chao,Yao，Zhifu,et al. An ultra-high-strength 12Mn maraging steel realized via nanoscale heterostructure engineering[J]. Materials Letters,2023,349.

Yang，Mujin.,Huang，Chao.,Yao，Zhifu.,Yang，Zhijie.,Li，Zhou.,...&Liu，Xingjun.(2023).An ultra-high-strength 12Mn maraging steel realized via nanoscale heterostructure engineering.Materials Letters,349.

Yang，Mujin,et al."An ultra-high-strength 12Mn maraging steel realized via nanoscale heterostructure engineering".Materials Letters 349(2023).