A novel lean alloy of biodegradable Mg–2Zn with nanograins

Wenhui Wang; Carsten Blawert; Rui Zan; Yu Sun; Hongzhou Peng; Jiahua Ni; Pei Han; Tao Suo; Yang Song; Shaoxiang Zhang; Mikhail L. Zheludkevich; Xiaonong Zhang

Bioactive Materials (Dec 2021)

A novel lean alloy of biodegradable Mg–2Zn with nanograins

Wenhui Wang,
Carsten Blawert,
Rui Zan,
Yu Sun,
Hongzhou Peng,
Jiahua Ni,
Pei Han,
Tao Suo,
Yang Song,
Shaoxiang Zhang,
Mikhail L. Zheludkevich,
Xiaonong Zhang

Affiliations

Wenhui Wang: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Magnesium Innovation Centre (MagIC), Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Geesthacht, 21502, Germany
Carsten Blawert: Magnesium Innovation Centre (MagIC), Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Geesthacht, 21502, Germany
Rui Zan: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Yu Sun: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Hongzhou Peng: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Jiahua Ni: Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, United States; Corresponding author.
Pei Han: Orthopaedic Department, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
Tao Suo: Zhongshan Hospital Fudan University, Shanghai, 200233, China
Yang Song: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Shaoxiang Zhang: Suzhou Origin Medical Technology Co. Ltd., Jiangsu, 215513, China; Corresponding author.
Mikhail L. Zheludkevich: Magnesium Innovation Centre (MagIC), Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Geesthacht, 21502, Germany; Corresponding author.
Xiaonong Zhang: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Corresponding author.

Journal volume & issue: Vol. 6, no. 12
pp. 4333 – 4341

Abstract

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Lean alloy (low alloyed) is beneficial for long-term sustainable development of metal materials. Creating a nanocrystalline microstructure is a desirable approach to improve biodegradability and mechanical properties of lean biomedical Mg alloy, but it is nearly impossible to realize. In the present study, the bulk nanocrystalline Mg alloy (average grain size: ~70 nm) was successfully obtained by hot rolling process of a lean Mg-2wt.%Zn (Z2) alloy and both high strength ((223 MPa (YS) and 260 MPa (UTS)) and good corrosion resistance (corrosion rate in vivo: 0.2 mm/year) could be achieved. The microstructure evolution during the rolling process was analyzed and discussed. Several factors including large strain, fine grains, strong basal texture, high temperature and Zn segregation conjointly provided the possibility for the activation of pyramidal slip to produce nanocrystals. This finding could provide a new development direction and field of application for lean biomedical Mg alloys.

Published in Bioactive Materials

ISSN: 2452-199X (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Science: Biology (General)
Website: https://www.keaipublishing.com/en/journals/bioactive-materials/

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