Achieving stable plastic flows in a Zr-based bulk metallic glass under tailored mixed-mode (I/II) loading conditions

被引：8

作者：

Chen, S. H. ^{[1
,2
]}

Tang, H. H. ^{[1
]}

Zheng, H. M. ^{[1
]}

Chang, W. J. ^{[1
]}

Zhang, J. C. ^{[1
]}

Yang, H. D. ^{[1
]}

Zhang, Z. F. ^{[1
]}

Yu, D. B. ^{[3
]}

Chan, K. C. ^{[4
]}

Liu, R. P. ^{[2
]}

机构：

[1] Hefei Univ Technol, Sch Mech Engn, Hefei 230009, Peoples R China

[2] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China

[3] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[4] Hong Kong Polytech Univ, Dept Ind & Syst Engn, Adv Mfg Technol Res Ctr, Hung Hom,Kowloon, Hong Kong, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 772卷

基金：

芬兰科学院; 中国国家自然科学基金;

关键词：

Bulk metallic glass; Plastic flow; Mixed-mode; Complex stress field; Shear band; SERRATED FLOW; DEFORMATION-BEHAVIOR; SHEAR BANDS; COMPRESSION; MECHANISM; FRACTURE;

D O I：

10.1016/j.msea.2019.138695

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The achievement of stable plastic flows plays a key role for practical structural applications of bulk metallic glasses (BMGs). In this work, by designing complex stress fields through tailored double-side notches, stable plastic flows in a Zr-based BMG were achieved under mixed-mode (I/II) loading conditions. The deformation behavior of the notched BMG specimens, including the shear-banding and fracture behaviors, was examined and correlated to the designed complex stress fields. The findings have shown that the stable plastic flows were mainly caused by the introducing of mode-II component under the mixed-mode (I/II) loading conditions. Increase of the mode-II component can result in not only more stable plastic flows, but also larger bearing loads. The present findings are of significance in uncovering the plastic deformation mechanisms of BMGs under mixed-mode loading conditions and in designing BMG structures with better mechanical performance.

引用

页数：7

共 44 条

[1] Surface roughness imparts tensile ductility to nanoscale metallic glasses [J].