Pronounced softening of a Zr-based metallic glass in micro annular gap flow

被引：3

作者：

Li, Zu ^{[1
,2
]}

Zhang, Meng ^{[3
]}

Wang, Jing ^{[4
]}

Li, Ning ^{[1
]}

Liu, Lin ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol Wuhan, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan, Peoples R China

[2] Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou, Peoples R China

[3] Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China

[4] Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Dept Orthopaed, Wuhan, Peoples R China

来源：

MATERIALS RESEARCH LETTERS | 2022年 / 10卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Metallic glass; annular gap flow; deformation structure; softening; SHEAR BANDS; DEFORMATION; DUCTILITY; DEFECTS; ALLOYS; ORIGIN;

D O I：

10.1080/21663831.2021.2017044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

IMPACT STATEMENT The effects of shear in micro annular gap flow on the structure and mechanical properties of metallic glass were revealed. While shear softening is widely acknowledged inflow of metallic glasses (MGs), the underlying structural origin remains obscure. Here a Zr35Ti30Be26.75Cu8.25 MG was squeezed into annular gaps of an exterior diameter of 300 mu m and widths of 5 similar to 150 mu m by thermoplastic embossing. Pronounced softening was detected for MG flowing in gaps smaller than 50 mu m, showing a hardness value similar to 1/30 of MG outside the gap. Nanofoam-like feature was observed in the atomic structure of softened MG. This is attributed to the increased shear in MG flowing in smaller gaps and proposed to be the main cause for the pronounced softening.

引用

页码：62 / 69

页数：8

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