Enhanced strength-ductility synergy in CuSn alloy via tuning Ti content

Dazhuo Song; Juntao Zou; Zhiwei Zhang; Lixing Sun; Junsheng Cheng; Zhao Shang; Yihui Jiang; Lin Shi; Yuxuan Wang; Yuanshu Zhang; Yuchen Song

Journal of Materials Research and Technology (Jul 2023)

Enhanced strength-ductility synergy in CuSn alloy via tuning Ti content

Dazhuo Song,
Juntao Zou,
Zhiwei Zhang,
Lixing Sun,
Junsheng Cheng,
Zhao Shang,
Yihui Jiang,
Lin Shi,
Yuxuan Wang,
Yuanshu Zhang,
Yuchen Song

Affiliations

Dazhuo Song: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Juntao Zou: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China; Corresponding author. Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Zhiwei Zhang: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Lixing Sun: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Junsheng Cheng: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
Zhao Shang: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Yihui Jiang: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Lin Shi: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Yuxuan Wang: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Yuanshu Zhang: Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
Yuchen Song: Faculty of Humanities and Foreign Languages, Xi'an University of Technology, Xi'an, 710048, PR China

Journal volume & issue: Vol. 25
pp. 3382 – 3394

Abstract

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CuSn alloy is the key raw material for the preparation of Nb3Sn superconducting wires. The properties of Nb3Sn wires can be greatly enhanced by preparing CuSn alloys with high solid solubility of Sn atoms and adding Ti elements. In this paper, the CuSn alloy was prepared by directional solidification with Ti added. Then the homogenization system is determined by calculation and it is expected to improve the structure segregation and mechanical properties of the alloy. Therefore studies the distribution of Ti elements and the relationship between the microstructure evolution and mechanical properties in CuSn alloy. The results indicate that the as-cast structure of the alloy is mainly a core-shell structure, and the grains show a good (001) orientation. It was also found that the Sn-rich phase in the alloy transforms to α-Cu solid solution during homogenization. The mechanical property tests show that the CuSn alloy with 0.3 wt% Ti content has both high strength (409 MPa) and elongation (69%). The main mechanism for enhanced the strength-ductility of the alloy is as follows. The core-shell structure allows sufficient diffusion of Sn atoms during the homogenization treatment, and the CuSn3Ti5 phase hinders the twin growth. As a result, the ductility of the alloy increases significantly. When the Ti content continues to increase until the CuSn3Ti5 phase segregates, causing the alloy's strength and elongation to plummet.

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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