Next Article in Journal
A Stochastic Model Approach for Copper Heap Leaching through Bayesian Networks
Previous Article in Journal
Simulation and Experimental Comparison of Laser Impact Welding with a Plasma Pressure Model
Open AccessArticle

Influence of Vibrational Loading on Deformation Behavior of Metallic Glass: A Molecular Dynamics Study

by Pan Gong 1 and Lei Deng 1,*
1
State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
2
Hubei Provincial Engineering Research Center of Industrial Detonator Intelligent Assembly, Wuhan Textile University, 1 Yangguang Avenue, Wuhan 430073, China
*
Author to whom correspondence should be addressed.
Metals 2019, 9(11), 1197; https://doi.org/10.3390/met9111197
Received: 18 October 2019 / Revised: 5 November 2019 / Accepted: 6 November 2019 / Published: 7 November 2019
The influence of vibrational loading on the deformation behavior of a Zr50Cu46Al4 metallic glass (MG) was characterized via molecular dynamics approaches. High-frequency (1 GHz) vibrational loading was imposed on the elastoplastic deformation stage during the uniaxial tension of the MG conducted at 50 K. It was found that imposing vibrational loading scarcely reduces the average deformation resistance. On the contrary, it results in a notable residual hardening effect after the vibrational loading is removed, which differs significantly from the previously reported acoustic softening mechanisms. Vibrational loading can increase the fraction of STZed atoms and enhance the shear localization degree, which is beneficial to the shear deformation of MGs. Meanwhile, the influence of vibrational loading on the local microstructure of MG is negligible. A plausible explanation of these phenomena is given by considering the accelerated aging of MG stemming from the β relaxation.
Keywords: vibrational loading; metallic glass; molecular dynamics simulation; residual hardening; aging vibrational loading; metallic glass; molecular dynamics simulation; residual hardening; aging
MDPI and ACS Style

Gong, P.; Deng, L. Influence of Vibrational Loading on Deformation Behavior of Metallic Glass: A Molecular Dynamics Study. Metals 2019, 9, 1197.

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.

Article Access Map by Country/Region

1
Back to TopTop