Study on the interface formation mechanism and properties of CoCrNi/316L composites prepared by explosive welding

Jiahui Li; Xiaopeng Liang; Hui Tao; Zhiheng Zeng; Xiaofen Tan; Huizhong Li; Yong Liu

Journal of Materials Research and Technology (Mar 2025)

Study on the interface formation mechanism and properties of CoCrNi/316L composites prepared by explosive welding

Jiahui Li,
Xiaopeng Liang,
Hui Tao,
Zhiheng Zeng,
Xiaofen Tan,
Huizhong Li,
Yong Liu

Affiliations

Jiahui Li: School of Materials Science and Engineering, Central South University, Changsha, 410083, China
Xiaopeng Liang: School of Materials Science and Engineering, Central South University, Changsha, 410083, China; State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha, 410083, China; Corresponding author. School of Materials Science and Engineering, Central South University, Changsha 410083, China.
Hui Tao: School of Materials Science and Engineering, Central South University, Changsha, 410083, China
Zhiheng Zeng: School of Materials Science and Engineering, Central South University, Changsha, 410083, China; Hunan Phohom New Material Technology Co., Ltd., Changsha, 410093, China
Xiaofen Tan: School of Materials Science and Engineering, Central South University, Changsha, 410083, China; Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha, 410083, China; Corresponding author. School of Materials Science and Engineering, Central South University, Changsha 410083, China.
Huizhong Li: School of Materials Science and Engineering, Central South University, Changsha, 410083, China; State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha, 410083, China
Yong Liu: State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China

Journal volume & issue: Vol. 35
pp. 4587 – 4598

Abstract

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In this study, a CoCrNi/316L composite is prepared via explosive welding. The interface of the CoCrNi/316L composite exhibits a uniform wavy structure with vortices. The formation mechanism of the wavy interface is clarified using smoothed particles hydrodynamics (SPH) simulation, which is also employed to calculate the temperature and strain distribution at the interface during the explosive welding. By correlating the simulated temperature and strain fields at different locations with the experimentally observed grain characteristics, the formation mechanism of various grain types near the interface is analyzed. The CoCrNi matrix consists of ultrafine equiaxed grains formed through dynamic recrystallization (DRX), while the 316L contains coarse grains characterized by high stress due to severe deformation. The vortex zones are primarily composed of columnar grains resulting from crystallization of molten liquid. Nanoindentation test results show that the hardness progressively increases from the matrix to the interface. Notably, the interfacial shearing strength of the CoCrNi/316L composite reaches up to 796 MPa.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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