Using electrodeposition and chemical plating, Ni film and Ni-P film were coated on the surface of Zr-based amorphous alloy of Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit.1). The compression behavior of the bare Vit.1 pillars and the Vit.1 pillars with the Ni-coating and Ni-P/Ni-coating was studied. The Ni-P/Ni/Vit.1 pillars with "amorphous-crystalline-amorphous" sandwiched structure formed a "hard-soft-hard" composite, and the Ni/Vit.1 pillars formed a "soft-hard" composite. The experimental results show that the surface coating increases the density of shear bands in the Vit.1 pillars, resulting in the improvement of the compression ductility. The Ni-P/Ni/Vit.1 pillars have the largest engineering plastic strain of 21.3±1.0% for the "uniform plastic deformation", about 11.2 times of 1.9% of the bare Vit.1 pillars. The Ni-P/Ni-coating limits the propagation of shear bands, which leads to the initiation and formation of multiple shear bands. The technique developed in this work provides a new route to enhance the compression ductility of amorphous alloy at room temperature.
|Number of pages||8|
|Journal||Materials Science and Engineering A|
|State||Published - Sep 3 2015|
Bibliographical noteFunding Information:
J.W.Q. would like to acknowledge the financial support of National Natural Science Foundation of China (No. 51371122 ), and the Program for the Innovative Talents of Higher Learning Institutions of Shanxi (2013), and the Youth Natural Science Foundation of Shanxi Province, China (No. 2015021005). H.J.Y. would like to acknowledge the financial support from the National Natural Science Foundation of China (No. 51401141 ), and the Youth Science Foundation of Shanxi Province , China (No. 2014021017-3 ). F.Q.Y. is grateful for the support from the “Hundred-People-Plan” Program of Shanxi (2014).
- Amorphous alloy
- Shear bands
ASJC Scopus subject areas
- Materials Science (all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering