|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||Stress-strain Response and Microstructure of High Entropy Alloy (Fe<sub>20</sub>Mn<sub>20</sub>Ni<sub>20</sub>Co<sub>20</sub>Cr<sub>20</sub>) Deformed Micro-pillars
||Daniel Janda, Hyokyung Sung, Alexander Kauffmann, Martin Heilmaier, Sharvan K. Kumar
|On-Site Speaker (Planned)
Understanding the deformation behavior of single crystals is an important step in unraveling the fundamental deformation mechanisms in high entropy alloys (HEAs). Here, a fcc HEA (Fe-Mn-Ni-Co-Cr) has been synthesized from high-purity raw material in equi-molar ratio by arc-melting and was subsequently rotary swaged. The microstructure was chemically homogenized and recrystallized to a grain size of 50 – 100 μm. Grain orientations were obtained by EBSD and then micro-pillars were machined by focused ion beam (FIB) from selected grains to examine single and multiple slip behavior. Compression stress-strain curves were obtained and CRSS and work-hardening behavior were documented. Lift-out of TEM specimens from the deformed micro-pillars by FIB are in progress and will be used for dislocation analysis. Results from these experiments will be presented and discussed in the context of dilute fcc alloys and pure metals.
||Planned: A print-only volume