Development of novel ferritic steels strengthened by the Co16X6Si7-G phase: A theoretical and experimental study

Cuiping Wang; Xiang Huang; Mujin Yang; Jiajia Han; Zhifu Yao; Tao Yang; Yilu Zhao; Weihong Liu; Liangfeng Huang; Chao Huang; Shaobin Pan; Zhou Li; Chenglei Wang; Youheng Chen; Chen Yang; Xingjun Liu

Materials & Design (Oct 2022)

Development of novel ferritic steels strengthened by the Co16X6Si7-G phase: A theoretical and experimental study

Cuiping Wang,
Xiang Huang,
Mujin Yang,
Jiajia Han,
Zhifu Yao,
Tao Yang,
Yilu Zhao,
Weihong Liu,
Liangfeng Huang,
Chao Huang,
Shaobin Pan,
Zhou Li,
Chenglei Wang,
Youheng Chen,
Chen Yang,
Xingjun Liu

Affiliations

Cuiping Wang: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, China
Xiang Huang: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, China
Mujin Yang: Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Corresponding authors at: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China (Jiajia Han and Xingjun Liu).
Jiajia Han: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, China; Corresponding authors at: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China (Jiajia Han and Xingjun Liu).
Zhifu Yao: School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 150001, China
Tao Yang: Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
Yilu Zhao: School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 150001, China
Weihong Liu: School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 150001, China
Liangfeng Huang: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, China
Chao Huang: School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 150001, China
Shaobin Pan: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, China
Zhou Li: School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 150001, China
Chenglei Wang: School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 150001, China
Youheng Chen: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, China
Chen Yang: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, China
Xingjun Liu: School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 150001, China; College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, China; Corresponding authors at: College of Materials and Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China (Jiajia Han and Xingjun Liu).

Journal volume & issue: Vol. 222
p. 111021

Abstract

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This work aims to develop a novel Co16X6Si7-G (X = Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re) phase strengthened ferritic steel with the help of first-principles calculations. Ddensity function theory calculation results demonstrated that the Co16X6Si7-G phase possesses the advantage of good thermodynamic stability and low misfit with the ferritic matrix. On the basis of calculation, we successfully prepared three model alloys, i.e., the Fe20Cr5Co2Si1Ti, Fe20Cr5Co2Si0.75Nb and Fe20Cr5Co2Si1.5Ta (wt.%), who make a good trade-off between strength, ductility and good oxidation/corrosion resistance. Our observation verified that the Co16X6Si7-G phase can precipitate within 1 h with proper heat treatment, showing a cube-on-cube orientation relationship with its parent matrix. The introduction of G phase precipitates amazingly increases the micro-hardness of model alloys by ∼ 160 HV after aging at 873 K. And the precipitates within the ferrite phase have not been observed to grow coarser even after 96 hrs aging treatment. Furthermore, excellent mechanical properties of ∼ 1.2 GPa tensile strength and ∼ 10 % total elongation have been achieved after 6 hrs aging time at 873 K. These findings indicate the Co16X6Si7-G phase would be a promising candidate as a strengthening medium and provide valuable insight into the screen of precipitates for the development of high-strength and ductile steels.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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