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

作　　者：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 

机构地区：[1]State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai,200240,China [2]Magnesium Innovation Centre(MagIC),Institute of Materials Research,Helmholtz-Zentrum Geesthacht,Geesthacht,21502,Germany [3]Department of Mechanical Engineering,Massachusetts Institute of Technology,Cambridge,MA,02139,United States [4]Orthopaedic Department,Shanghai Jiao Tong University Affiliated Sixth People’s Hospital,Shanghai,200233,China [5]Zhongshan Hospital Fudan University,Shanghai,200233,China [6]Suzhou Origin Medical Technology Co.Ltd.,Jiangsu,215513,China

出　　处：《Bioactive Materials》2021年第12期4333-4341,共9页生物活性材料（英文）

基　　金：This work was funded by the National Key R&D Program of China(No.2018YFC1106600);the“Science and Technology Innovation 2025”Major Special Project of Ningbo(No.2019B10064).

摘　　要：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<c+a>slip to produce nanocrystals.This finding could provide a new development direction and field of application for lean biomedical Mg alloys.

关 键 词：Magnesium alloy Nanocrystal BIODEGRADABLE ROLLING Microstructure 

分 类 号：TG13[一般工业技术—材料科学与工程]