The effect of minor Cu and Nb addition on glass-forming ability and nanocrystallization behavior of cast-iron-based bulk metallic glass was investigated. With simultaneous Cu and Nb addition, the crystallization kinetics of the amorphous alloys adequately modified to have enlarged initial nucleation rate and reduced growth rate of the primary α-Fe phase. However, due to the increased tendency to form secondary Fe3C and Fe2P phase, the cast-iron-based bulk metallic glass with combined Cu and Nb addition had a reduced processing window for nanocrystallization. Also, the simultaneous Cu and Nb addition decreased glass-forming ability of the alloy. Thus, it was revealed that the classical nanocrystallization strategy introducing combined Cu and Nb addition is not a suitable alternative to facilitate nanocrystallization of cast-iron-based bulk metallic glasses.
Bibliographical noteFunding Information:
This work was supported by the Global Research Laboratory Program of the Korea Ministry of Science and Technology . The additional support of the German Science Foundation (DFG) through the grant ( KU 1974/11-1 ) and under the Leibniz Program (grant EC 111/26-1) as well as support through the European Research Council under the ERC Advanced Grant INTELHYB (grant ERC-2013-ADG-340025 ) and support from ESRF through the experiment HC-1454 is also gratefully acknowledged.
© 2015 Elsevier Ltd.
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry