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Plastic deformation behavior of Fe-Co-B-Si-Nb-Cr bulk metallic glasses under nanoindentation
- Authors
- Kim, J. T.; Hong, S. H.; Lee, C. H.; Park, J. M.; Kim, T. W.; Lee, W. H.; Yim, H. I.; Kim, K. B.
- Issue Date
- Feb-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Metallic glasses; Mechanical properties; Microstructure; Strain
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.587, pp 415 - 419
- Pages
- 5
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 587
- Start Page
- 415
- End Page
- 419
- ISSN
- 0925-8388
1873-4669
- Abstract
- 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.
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