Enhanced mechanical performance and tailored degradation characteristics of rolled Zn-0.8Li-0.4Mn alloy

Xinxin Yang; Weizong Bao; Zeyun Cai; Bohua Yu; Jie Chen; Xingjun Liu; Guoqiang Xie

Materials & Design (Sep 2024)

Enhanced mechanical performance and tailored degradation characteristics of rolled Zn-0.8Li-0.4Mn alloy

Xinxin Yang,
Weizong Bao,
Zeyun Cai,
Bohua Yu,
Jie Chen,
Xingjun Liu,
Guoqiang Xie

Affiliations

Xinxin Yang: School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Weizong Bao: School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Zeyun Cai: Institute of Special Environments Physical Sciences, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Bohua Yu: School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Jie Chen: School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Xingjun Liu: School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China; Corresponding authors at: School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
Guoqiang Xie: School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China; Corresponding authors at: School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.

Journal volume & issue: Vol. 245
p. 113259

Abstract

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The application of biodegradable Zn-based vascular alloy stents proves to be an ideal solution for addressing cardiovascular diseases. In this work, a Zn-0.8Li-0.4Mn alloy is designed with no biological toxicity, and optimized microstructure and properties through a hot rolling process. The resulting alloy shows a combined enhancement in both mechanical strength and resistance to corrosion. Noteworthy is the effectiveness of rolling deformation in refining alloy grains, promoting the uniform distribution of precipitates, and enhancing strength and ductility. After 90 % deformation, the Zn-0.8Li-0.4Mn alloy demonstrates excellent mechanical properties, with peak yield strength and ultimate tensile strength of 406.0 MPa and 449.1 MPa, respectively, and elongation exceeding 75 %. Corrosion studies indicate a relationship between the degradation rate increase and grain refinement, with the primary corrosion mechanism being pitting corrosion. The corrosion product Li2CO3 exhibits high stability, providing a passivation effect on the alloy surface. This work establishes a theoretical foundation and practical reference for the development of new biodegradable Zn-based alloys tailored for biomedical applications.

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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