|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Entropy Alloys V
||L-101: Exploring the Effects of Grain Refinement in Non-equiatomic High Entropy Alloys
||Benjamin MacDonald, Zhiqiang Fu, Baolong Zheng, Weiping Chen, Julia Ivanisenko, Yizhang Zhou, Horst Hahn, Enrique Lavernia
|On-Site Speaker (Planned)
The underlying phenomena governing mechanical behavior and thermal stability in nanostructured high entropy alloys (HEAs) was studied within a non-equiatomic composition of FeNiCoCuMn. The HEA was first synthesized via ingot casting and then fully homogenized through subsequent heat treatments to produce a coarse grain microstructure with a single face centered cubic phase, which was confirmed by x-ray diffraction, electron backscatter diffraction, and transmission electron microscopy. Baseline mechanical behavior and thermal stability in the coarse-grained FeNiCoCuMn HEA were examined through tensile tests and differential scanning calorimetry, respectively. Severe plastic deformation was utilized as a secondary processing route to achieve significant grain refinement in the homogenized non-equiatomic FeNiCoCuMn HEA. Assessments of the thermal stability and microstructure evolution of these nanostructured samples, specifically grain size, phase formation, and dislocation density, are used to explain the mechanical behavior at ambient and elevated temperatures.
||Planned: Supplemental Proceedings volume