|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Additive Manufacturing of High-entropy Alloys for High Strength and Lightweight Structures
||Jie Ren, Wen Chen
|On-Site Speaker (Planned)
High-entropy alloys (HEAs) are a class of multi-principal element alloys with high configurational entropy and severe lattice distortion. The radical departure from the conventional design motif has shifted the alloy design space from corners of a phase diagram to more spacious central region, which opens a new arena for explorations of new materials with exceptional properties. Currently, HEAs are mainly manufactured by casting or through thermomechanical process. Although viable, such processing methods lose practical competency for manufacturing large-scale, especially geometrically-complex components. To address this limitation, I will present our recent work on additive manufacturing of HEAs for structural applications. These extreme printing conditions including large temperature gradients and fast cooling rates can result in far-from-equilibrium states which enable the access of engineered heterogeneous hierarchical microstructure ranging from nanometer to micrometer. The additively manufactured HEAs show simultaneously enhanced strength and ductility that open new opportunities for lightweight materials and structure design.
||Additive Manufacturing, High-Entropy Alloys, Mechanical Properties