| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
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| Symposium
|
Progress towards Understanding the Synthesis and Behavior of Metals Far from Equilibrium: A SMD Symposium Honoring Enrique Lavernia on the Occasion of His 60th Birthday
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| Presentation Title |
Microstructural Evolution and Mechanical Behavior of an AlCoCrCuFeNi High Entropy Alloy during Non-equilibrium Powder Metallurgical Processing |
| Author(s) |
Baolong Zheng, Benjamin MacDonald, Zhiqiang Fu, Yizhang Zhou, Enrique J. Lavernia |
| On-Site Speaker (Planned) |
Baolong Zheng |
| Abstract Scope |
Significant improvements in materials properties have been achieved by processing the materials under far-from-equilibrium (or non-equilibrium) conditions, such as rapid solidification (RS), cryogenic severe plastic deformation (SPD), and fast field assisted sintering (FFAS). A combination of a series of non-equilibrium processes, including gas atomization (GA), cryomilling (CM) and spark plasma sintering (SPS) was employed in this research to fabricate a nano-crystalline (NC) multi-phase AlCoCrCuFeNi High Entropy Alloy (HEA). The non-equilibrium microstructural evolution was investigated by using SEM, TEM/HRTEM, and XRD techniques, and revealed nano-scale deformation structures including dislocation tangles and deformation bands. In this presentation, the influence of processing on grain size and phase evolution is reported and discussed. The influence of the non-equilibrium nature of GA, CM, and SPS processing on the grain refinement, and its effects to the mechanical properties are discussed in an effort to highlight the underlying fundamental phenomena associated with non-equilibrium processing and microstructural evolution. |
| Proceedings Inclusion? |
Undecided |