We report the fabrication of the Cu-Ni-Zr-Ti bulk amorphous alloys by warm rolling of amorphous powders, which have been prepared by a high-pressure gas atomization. The Cu54Ni6Zr22Ti18 amorphous powders obtained by a high-pressure He gas atomization method has a wide supercooled liquid region of 53 K. By warm rolling of amorphous powders in the supercooled liquid state, a fully amorphous Cu54Ni 6Zr22Ti18 alloy is successfully synthesized. The conditions for rolling are obtained from the time-temperature-transformation curve by measuring the time for the onset of crystallization during isothermal annealing in differential scanning calorimetry. The rolled bulk amorphous Cu54Ni6Zr22Ti18 alloy exhibited high strength about 1.9 GPa, which is against similar to that obtained in the as-cast bulk amorphous alloy.
Bibliographical noteFunding Information:
This work is supported by the Next Generation-New Technology Development Program of Ministry of Commerce, Industry and Energy in Korea.
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry