|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||Introducing gradient structure to a CrMnFeCoNi high-entropy alloy for superior mechanical properties
||Nazmul Hasan, Xianghai An, Yuntian Zhu, Xiaozhou Liao
|On-Site Speaker (Planned)
We explore how different gradient structures of an equiatomic CrMnFeCoNi high-entropy alloy (HEA) affect its mechanical properties. The alloy was processed using the rotationally accelerated shot peening technique. Varying processing parameters leads to different gradient hierarchical structures that subsequently change the mechanical behaviour of the material. Microstructures along the depth from sample surface were characterized using advanced electron microscopy. Mechanical properties were obtained using microindentation and uniaxial tensile testing. The quantitative contributions of different structural features including deformation twins and dislocations to the surface hardening were carefully investigated. Based on our study, an appropriate gradient structure profile is recommended for excellent combination of strength and ductility.
||High-Entropy Alloys, Mechanical Properties, Characterization