TY - JOUR
T1 - Laser nitriding of Zr-based metallic glass
T2 - An investigation by orthogonal experiments
AU - Hong, Jing
AU - Qian, Yongfeng
AU - Zhang, Lin
AU - Huang, Hu
AU - Jiang, Minqiang
AU - Yan, Jiwang
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant No. 51705197 ), the Graduate Innovation Fund of Jilin University (Grant No. 101832020CX106 ), and the Fundamental Research Funds for the Central Universities (2019–2021).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/25
Y1 - 2021/10/25
N2 - Laser nitriding is a useful method to improve the surface hardness of materials, and it has been newly introduced to harden the surface of Zr-based metallic glass (MG). However, the currently achieved improvement in surface hardness is only 15.7%. To explore the potential of laser nitriding of Zr-based MG, orthogonal experiments were designed and performed in this study. By nanosecond pulsed laser irradiation in nitrogen atmosphere, the effects of laser parameters (average laser power, scanning speed, overlap rate and number of irradiation cycle) on the surface hardness of Zr-based MG were systematically investigated. The experimental results showed the highest surface hardness reached 18.21 GPa (Meyer's hardness) by orthogonal design, which is about 2 times higher than that of the as-cast MG. Furthermore, the laser affecting layer consisting of nitride phase reached tens of microns. The obtained results demonstrated that significant improvement in surface hardness could be achieved by selecting appropriate laser irradiation parameters, which would be beneficial to the engineering applications of MGs as surface contact materials.
AB - Laser nitriding is a useful method to improve the surface hardness of materials, and it has been newly introduced to harden the surface of Zr-based metallic glass (MG). However, the currently achieved improvement in surface hardness is only 15.7%. To explore the potential of laser nitriding of Zr-based MG, orthogonal experiments were designed and performed in this study. By nanosecond pulsed laser irradiation in nitrogen atmosphere, the effects of laser parameters (average laser power, scanning speed, overlap rate and number of irradiation cycle) on the surface hardness of Zr-based MG were systematically investigated. The experimental results showed the highest surface hardness reached 18.21 GPa (Meyer's hardness) by orthogonal design, which is about 2 times higher than that of the as-cast MG. Furthermore, the laser affecting layer consisting of nitride phase reached tens of microns. The obtained results demonstrated that significant improvement in surface hardness could be achieved by selecting appropriate laser irradiation parameters, which would be beneficial to the engineering applications of MGs as surface contact materials.
KW - Laser nitriding
KW - Metallic glass
KW - Orthogonal experiment
KW - Surface hardness
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U2 - 10.1016/j.surfcoat.2021.127657
DO - 10.1016/j.surfcoat.2021.127657
M3 - Article
AN - SCOPUS:85114386846
SN - 0257-8972
VL - 424
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 127657
ER -