|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Engineering Atomic-level Complexity in Complex Concentrated Alloys
||Hyunseok Oh, Khorgolkhuu Odbadrakh , Sang Jun Kim, Wook Ha Ryu, Kook Noh Yoon, Sai Mu, Fritz Körmann, Yuji Ikeda, Cemal Cem Tasan, Dierk Raabe, Takeshi Egami, Eun Soo Park
|On-Site Speaker (Planned)
Quantitative and well targeted design of complex concentrated alloys (CCAs) is extremely challenging due to their immense compositional space. Here we show that the atomic-level pressure in single phase face-centered cubic (fcc) CCAs consisting of 3d transition metal elements (V, Cr, Mn, Fe, Co, and Ni) (3d CCAs) originates from the charge transfer between neighboring elements by theory (quantum-mechanically derived approximation) and experiment (element-dependent lattice distortion). It allows identifying the best suited element mix for massive solid solutions and predicting the resulting solid-solution strength using the simple electronegativity difference among the constituent elements. The method can be used to design new alloys with customized properties, such as a simple binary NiV solid solution which exceeds the yield strength of the established Cantor high entropy alloy by nearly a factor of 2, and TWIP or TRIP high entropy alloys having increased strain hardening rates while maintaining the similar yield strengths.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume