TY - JOUR
T1 - Significant improvement in surface hardness of Zr-based metallic glass by nanosecond pulsed laser irradiation in graphite powder water suspension
AU - Zhang, Hongyang
AU - Qian, Yongfeng
AU - Zhang, Lin
AU - Jiang, Minqiang
AU - Huang, Hu
AU - Yan, Jiwang
N1 - Funding Information:
This work was supported by the Natural Science Foundation of Jilin Province ( 20220101198JC ), the National Natural Science Foundation of China (Grant No. 51705197 ), National Outstanding Youth Science Fund Project (No. 12125206 ) of NSFC , the Opening Project of the Key Laboratory of CNC Equipment Reliability, Ministry of Education, Jilin University ( JLU-cncr-202208 ), and the Fundamental Research Funds for the Central Universities ( 2020-2022 ).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/2/15
Y1 - 2023/2/15
N2 - Metallic glasses (MGs) have shown promising application prospects as structural materials due to their unique mechanical properties. While, for broadening their application as functional materials, significant improvement in surface hardness of MGs is required. Accordingly, in this study, laser carbonization of MGs was attempted by irradiating the Zr-based MG surface immersed in graphite powder water suspension using a nanosecond pulsed laser. Nanoindentation response and surface morphologies of the initial and irradiated surfaces were characterized in detail. The results indicated that the hardness of the laser-irradiated surfaces was increased by 130 %–200 % (from 6.407 GPa to 19.193 GPa), and as well, the serrated flows in load-depth curves and the surface shear bands around the residual indent disappeared, suggesting the change in micro-scale plastic deformation behaviors of the laser-irradiated surfaces. Furthermore, the chemical composition of the initial and irradiated surfaces was analyzed by X-ray diffraction (XRD) and energy dispersive spectrometer (EDS), which showed that the irradiated surfaces were carbonized in the graphite powder water suspension. Accordingly, the increase in surface hardness was due to the formation of the hard crystalline phases.
AB - Metallic glasses (MGs) have shown promising application prospects as structural materials due to their unique mechanical properties. While, for broadening their application as functional materials, significant improvement in surface hardness of MGs is required. Accordingly, in this study, laser carbonization of MGs was attempted by irradiating the Zr-based MG surface immersed in graphite powder water suspension using a nanosecond pulsed laser. Nanoindentation response and surface morphologies of the initial and irradiated surfaces were characterized in detail. The results indicated that the hardness of the laser-irradiated surfaces was increased by 130 %–200 % (from 6.407 GPa to 19.193 GPa), and as well, the serrated flows in load-depth curves and the surface shear bands around the residual indent disappeared, suggesting the change in micro-scale plastic deformation behaviors of the laser-irradiated surfaces. Furthermore, the chemical composition of the initial and irradiated surfaces was analyzed by X-ray diffraction (XRD) and energy dispersive spectrometer (EDS), which showed that the irradiated surfaces were carbonized in the graphite powder water suspension. Accordingly, the increase in surface hardness was due to the formation of the hard crystalline phases.
KW - Hardness
KW - Laser processing
KW - Metallic glasses
KW - Nanoindentation
KW - Serrated flow
KW - Shear band
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U2 - 10.1016/j.surfcoat.2022.129195
DO - 10.1016/j.surfcoat.2022.129195
M3 - Article
AN - SCOPUS:85145666134
SN - 0257-8972
VL - 454
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 129195
ER -