|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Mechanical Behavior and Thermal Stability of a Dual-phase Complex High Entropy Alloy
||Benjamin MacDonald, Zhiqiang Fu, Zhiming Li, Weiping Chen, Yizhang Zhou, Dierk Raabe, Horst Hahn, Enrique Lavernia
|On-Site Speaker (Planned)
The underlying phenomena governing mechanical behavior and thermal stability in multi-phase high entropy alloys (HEAs) was studied within an equiatomic composition of MnFeCoNiCu. The HEA was first synthesized via ingot casting to produce a coarse grain microstructure with two face centered cubic random solid solution phases, which was confirmed by x-ray diffraction, electron backscatter diffraction, and transmission electron microscopy. A series of hot rolling, homogenization and cold rolling were utilized as a secondary processing route to achieve grain refinement in MnFeCoNiCu HEA. The thermal stability of the dual-phase microstructure was explored through differential scanning calorimetry and confirmed by characterization of annealed samples. Mechanical behavior of the dual-phased MnFeCoNiCu HEA were examined through tensile tests along with nano-indentation to probe the contributions of each phase present. Assessments of the thermal stability and microstructure evolution of these samples after systematic annealing, specifically phase formation are used to explain the mechanical behavior.
||Planned: Supplemental Proceedings volume