TY - JOUR
T1 - Atomistic Simulation on the Mechanical Properties of Diffusion Bonded Zr-Cu Metallic Glasses with Oxidized Interfaces
AU - Li, Tian
AU - Zheng, Guangping
N1 - Funding Information:
This work was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (PolyU152607/16E).
Publisher Copyright:
© 2021, The Minerals, Metals & Materials Society and ASM International.
PY - 2021/5
Y1 - 2021/5
N2 - A novel welding technique of diffusion bonding for Zr-Cu metallic glass with pre-oxidized surfaces is proposed in this study, which is systematically investigated by molecular dynamics (MD) simulation. Compared with the conventional welding technique, the diffusion bonding process can be well implemented below the crystallization temperature of metallic glass. The obtained structure possesses glass–glass interfaces (GGIs) similar with those in nano-glasses. As revealed by MD simulation, the diffusion bonded metallic glasses possess enhanced mechanical strength and ductility that generally do not exist in nano-glasses and their bulk metallic glass counterparts. The GGIs are found to hinder the propagation of shear bands, where there is strong bonding between Zr and O and the segregated Cu and ZrO2 clusters could induce extra plasticity. The results demonstrate that the diffusion bonding of metallic glass with pre-oxidized surfaces could provide an alternative approach in solving the longstanding issue of size limitation on metallic glasses.
AB - A novel welding technique of diffusion bonding for Zr-Cu metallic glass with pre-oxidized surfaces is proposed in this study, which is systematically investigated by molecular dynamics (MD) simulation. Compared with the conventional welding technique, the diffusion bonding process can be well implemented below the crystallization temperature of metallic glass. The obtained structure possesses glass–glass interfaces (GGIs) similar with those in nano-glasses. As revealed by MD simulation, the diffusion bonded metallic glasses possess enhanced mechanical strength and ductility that generally do not exist in nano-glasses and their bulk metallic glass counterparts. The GGIs are found to hinder the propagation of shear bands, where there is strong bonding between Zr and O and the segregated Cu and ZrO2 clusters could induce extra plasticity. The results demonstrate that the diffusion bonding of metallic glass with pre-oxidized surfaces could provide an alternative approach in solving the longstanding issue of size limitation on metallic glasses.
UR - http://www.scopus.com/inward/record.url?scp=85102513733&partnerID=8YFLogxK
U2 - 10.1007/s11661-021-06204-w
DO - 10.1007/s11661-021-06204-w
M3 - Journal article
AN - SCOPUS:85102513733
SN - 1073-5623
VL - 52
SP - 1939
EP - 1946
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 5
ER -