|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Design of High-strength and Ductile High-entropy Steels
||Zhangwei Wang, Wenjun Lu, Huan Zhao, Dirk Ponge, Dierk Raabe, Zhiming Li
|On-Site Speaker (Planned)
We have developed a new class of high-entropy steels (HESs) by taking the advantage of the previously proposed high-entropy alloy (HEA) design concept. These newly designed HESs contain five major components, in which Fe has the highest atomic fraction and the minimal content of each component is above 5 at. %. We investigated the nanoprecipitation behavior of carbides and B2 phases in these novel HESs by means of high resolution scanning transmission electron microscopy (STEM) and atom probe tomography (APT) at atomic scales. Upon uniaxial tensile testing, our HESs show excellent specific strength and ductility, outperforming both the previous HEAs and the advanced lightweight steels. We further systematically investigated the interactions between dislocations and second phases including carbides and B2 particles to explain the outstanding specific strength and ductility in the HESs. Our study thus provides a number of new insights for the design of high-performance novel structural materials.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume