Mechanical response of Ti-based bulk metallic glass under static and dynamic indentations

被引：2
作者：
Wang, B. P. [1 ]
Wang, L. [1 ,2 ]
Xue, Y. F. [1 ,2 ]
Wang, Y. W. [1 ,2 ]
Zhu, L. J. [2 ,3 ]
Zhang, H. F. [4 ]
Fu, H. M. [4 ]
机构：
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
[2] Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China
[3] China Acad Ordnance Sci, Ningbo Branch, Ningbo, Zhejiang, Peoples R China
[4] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2015年 / 422卷
基金：
中国国家自然科学基金;
关键词：
Metallic glass; Dynamic hardness; Plastic deformation; Nanocrystallizations; Shear bands; INDUCED NANOCRYSTAL FORMATION; STRAIN-RATE SENSITIVITY; SHEAR-BAND EVOLUTION; COMPRESSIVE BEHAVIOR; DEFORMATION MORPHOLOGY; SUBSURFACE DEFORMATION; VICKERS INDENTATION; PLASTIC-DEFORMATION; SERRATED FLOW; FREE-VOLUME;
D O I：
10.1016/j.jnoncrysol.2015.05.015
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Vickers hardness and plastic deformation of Ti-based bulk metallic glass (Ti-BMG) were investigated under both static and dynamic indentations. Dynamic hardness is obviously greater than that under static indentation, which is attributed to the combination effects of energy barriers and separation of nanocrystallizations from the metallic glass during dynamic indentation. Although dynamic indentation induced more severe deformation than that under static indentation, the deformation characteristics in the two loading cases are nearly the same: both exhibiting semi-circular shear bands on the top surface and a mixture of semi-circular and radial shear bands underneath the indentation tips. The most obvious difference between the two kinds of indentations is that substantial successive shear bands accompanied by numerous shear-offsets formed in dynamic indentation while obviously less shear bands and shear-offsets formed in static indentation. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：32 / 38
页数：7
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