|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Microstructural Evolution and Mechanical Behavior of a TiC/FeCoNi Composite Fabricated through In Situ Reinforcement Formation
||Zhiqiang Fu, Benjamin MacDonald, Zhenfei Jiang, Weiping Chen, Julia Ivanisenko, Yizhang Zhou, Horst Hahn, Enrique Lavernia
|On-Site Speaker (Planned)
Face-centered cubic (fcc) structured medium-entropy alloys (MEAs) and high entropy alloys (HEAs) with coarse grains are characterized by good ductility but low yield strength (≤400 MPa). To investigate the possibility of increasing the yield strength without compromising ductility in an equi-atomic fcc structured MEA, TiC reinforcement particles were engineered into a FeCoNi MEA matrix. TiC reinforced FeCoNi composite was fabricated by mechanical alloying (MA) followed by spark plasma sintering (SPS). Following in-situ reaction at 1200℃ for 10 min, the microstructure consisted of a fcc FeCoNi MEA matrix with an average grain size of ~400 nm, and TiC particles with an average grain size of ~150 nm distributed along grain boundaries of the matrix. Tensile testing results showed that the yield strength (σ0.2) and elongation (El) of the composite are ~ 1012 MPa and ~10.2%, respectively.
||Planned: Supplemental Proceedings volume