Plasticity enhancement of high-entropy bulk metallic glasses by electroless plating with Ni-P amorphous films

Using chemical plating, Ni-P films were successfully coated on Ti20Zr20Hf20Be20Cu20 high-entropy bulk metallic glasses (HE-BMGs), and presented an enhancive adhesion as well as a higher deposition rate on account of the chemical pretreatment before electroless plating. With the coating, the plastic...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2016-09, Vol.673, p.141-147
Main Authors: Cao, J.W., Han, J.G., Guo, Z.H., Zhao, W.B., Guo, Y.Q., Xia, Z.H., Qiao, J.W.
Format: Article
Language:English
Subjects:
Amorphous materials
Bulk metallic glasses
Chemical plating
Coating
Electroless plating
High-entropy alloys
Metallic glasses
Nickel
Plastic deformation
Plasticity
Shear bands
Slip bands
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Summary:Using chemical plating, Ni-P films were successfully coated on Ti20Zr20Hf20Be20Cu20 high-entropy bulk metallic glasses (HE-BMGs), and presented an enhancive adhesion as well as a higher deposition rate on account of the chemical pretreatment before electroless plating. With the coating, the plastic strain of the HE-BMGs is increased up to 5.7%, which is 3.2 times of 1.8% of the bare pillars. It shows that the adhesive coating with a thickness of 10µm leads to a plasticity enhancement of HE-BMGs via the dispersive impact of coating on the concentrated stress. In addition, the coating leads to more homogeneous regions where shear banding may take place and offers a preventible action for the rapid propagation of shear bands.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2016.07.078