In-situ TiC/Fe0.6MnNi1.4 medium entropy alloy matrix composites with excellent strength-ductility synergy
Abstract
TiC/Fe0.6MnNi1.4 medium entropy alloy matrix composites with different volume fractions of TiC particles (i.e., 5, 10 and 15 vol%) were prepared by induction melting method. The experimental results showed that both the base alloy and the composite matrix possess face-centered cubic structure. The in-situ TiC reinforcement phase can significantly increase the mechanical properties of the composites at room temperature. In particular, the hardness, yield strength and ultimate tensile strength of the 10 vol%TiC/Fe0.6MnNi1.4 composite are found respectively to be 528 HV, 345.1 MPa and 716.7 MPa, representing a marked increase by 51.7%, 41.1% and 30.7% in comparison with the Fe0.6MnNi1.4 medium entropy alloy. The ductility of the composite in terms of the elongation to failure is reduced from 65.8% to 36.6% with the increase of the TiC content, which remains attractive for load-bearing structural applications. The strength improvement is underpinned by a combination of the load-bearing effect, Orowan process, dislocation interactions and solid solution effect.
RAS ID
39562
Document Type
Journal Article
Date of Publication
2021
Volume
47
Issue
18
Funding Information
National Natural Science Foundation of China Jaingsu Province Science and Technology Plan Project, China
School
School of Engineering
Copyright
subscription content
Publisher
Elsevier
Comments
Huang, S., Wu, H., Zhu, H., & Xie, Z. (2021). In-situ TiC/Fe0. 6MnNi1. 4 medium entropy alloy matrix composites with excellent strength-ductility synergy. Ceramics International, 47(18), 26319-26326. https://doi.org/10.1016/j.ceramint.2021.06.042