Addition of Si into a Fe70Ni15B15 ultrafine eutectic composite has a significant influence to modulate the microstructure to bimodal eutectic structure comprising lamellar- and irregular-type eutectic by suppressing the formation of the micron-scale dendrites upon solidification. The (Fe70Ni15B 15)94Si4 bimodal eutectic composite presents considerably enhanced plasticity of ∼13% with high strength of ∼1520 MPa. The rotational motion of the spherical eutectic colony is considered to be a crucial factor to effectively dissipate shear localization thus improving the plastic deformability.
Bibliographical noteFunding Information:
This work was supported by the Global Research Laboratory Program of Korea Ministry of Education, Science and Technology and POSCO basic research funds .
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry