Plastic deformation behavior of Fe-Co-B-Si-Nb-Cr bulk metallic glasses under nanoindentation

被引：27
|
作者：
Kim, J. T. [1 ]
Hong, S. H. [1 ]
Lee, C. H. [1 ]
Park, J. M. [2 ]
Kim, T. W. [1 ]
Lee, W. H. [1 ]
Yim, H. I. [3 ]
Kim, K. B. [1 ]
机构：
[1] Sejong Univ, Fac Nanotechnol & Adv Mat Engn, HMC, Seoul 143747, South Korea
[2] SAIT, Mat Res Ctr, Yongin 446712, Gyeonggi Do, South Korea
[3] Sookmyung Womens Univ, Dept Phys, Seoul 140742, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 587卷
基金：
新加坡国家研究基金会;
关键词：
Metallic glasses; Mechanical properties; Microstructure; Strain; FREE-VOLUME; AMORPHOUS ALLOY; SERRATED FLOW; ENHANCEMENT; TRANSITION; DYNAMICS; MODEL;
D O I：
10.1016/j.jallcom.2013.10.097
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, we investigate the effect of Cr addition on thermal properties and indentation behavior of Fe52Co20-xB20Si4Nb4Crx alloys with x = 0, 1, 3 and 5 at.%, respectively. Among all studied alloys, the Fe52Co17B20Si4Nb4Cr3 bulk metallic glass (BMG) exhibits the highest thermal stability with large supercooled liquid region of 40 K and the pronounced plastic deformation features which is serrated flow (pop-in event) and significant pile- up of materials around indents. This demonstrates that the appropriate addition of Cr in Fe-based BMG can induce the internal atomic structure modulation and promote the mechanical softening, which are discussed in terms of free volume concept. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：415 / 419
页数：5
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