Next Article in Journal
Four Novel Zn (II) Coordination Polymers Based on 4′-Ferrocenyl-3,2′:6′,3′′-Terpyridine: Engineering a Switch from 1D Helical Polymer Chain to 2D Network by Coordination Anion Modulation
Previous Article in Journal
Finite Element Analysis of Tunable Composite Tubes Reinforced with Auxetic Structures
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle
Materials 2017, 10(12), 1361; https://doi.org/10.3390/ma10121361

Plastic Deformation of Pressured Metallic Glass

School of Mechanical, Electrical & Information Engineering, Shandong University (Weihai), 180 Wenhua Xi Road, Weihai 264209, China
*
Author to whom correspondence should be addressed.
Received: 30 October 2017 / Revised: 17 November 2017 / Accepted: 20 November 2017 / Published: 27 November 2017
Full-Text   |   PDF [3753 KB, uploaded 27 November 2017]   |  

Abstract

Although pressured metallic glass (MG) has been reported in the literature; there are few studies focusing on pressure effects on the structure; dynamics and its plastic deformation. In this paper; we report on and characterize; via molecular dynamics simulation, the structure and dynamics heterogeneity of pressured MGs, and explore a causal link between local structures and plastic deformation mechanism of pressured glass. The results exhibit that the dynamical heterogeneity of metallic liquid is more pronounced at high pressure, while the MGs were less fragile after the release of external pressure, reflected by the non-Gaussian parameter (NGP). High pressure glass shows better plastic deformation; and the local strain zone distributed more uniformly than of in normal glass. Further research indicates that although the number of icosahedrons in pressured glass was much larger than that in normal glass, while the interpenetrating connections of icosahedra (ICOI) exhibited spatial correlations were rather poor; In addition, the number of ‘fast’ atoms indexed by the atoms’ moving distance is larger than that in normal glass; leading to the sharp decreasing in number of icosahedrons during deformation. An uniform distribution of ‘fast’ atoms also contributed to better plastic deformation ability in the pressured glass. These findings may suggest a link between the deformation and destruction of icosahedra with short-range order. View Full-Text
Keywords: metallic liquid; high pressure; plastic deformation; dynamical heterogeneity metallic liquid; high pressure; plastic deformation; dynamical heterogeneity
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Cheng, Y.; Peng, C.; Zhang, Z.; Wang, P.; Yuan, S.; Wang, L. Plastic Deformation of Pressured Metallic Glass. Materials 2017, 10, 1361.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top