公开(公告)号：US20240295013A1

公开(公告)日：2024-09-05

申请号：US18424646

申请日：2024-01-26

Applicant: Shaanxi University of Technology

Inventor： Ran JING ,  Xiong ZHANG ,  Qing ZHANG ,  Taotao AI ,  Jianghua LI ,  Pengfei CHUI ,  Yang ZHANG ,  Zhongni LIAO

IPC: C22C30/02 ,  B08B7/02 ,  C22C1/02 ,  C23G1/08

CPC classification number: C22C30/02 ,  B08B7/028 ,  C22C1/02 ,  C22C2202/00 ,  C23G1/086

Abstract: The present disclosure provides a high-entropy alloy (HEA) with room-temperature superplasticity and a preparation method thereof, belonging to the field of metal materials. In the present disclosure, the HEA with room-temperature superplasticity has a chemical formula shown in Formula I: (FeCoNiCr)100-xCux (Formula I), where in Formula I, x is 2.0 to 4.0. A FeCoNiCr alloy is used as a matrix, and then added with a trace amount of a Cu element, thereby significantly reducing formation of a metastable phase in the FeCoNiCr alloy while reducing stacking fault energy of the alloy, such that the alloy maintains a desirable work hardening ability and achieves an excellent elongation at break. Moreover, a plasticity of the alloy is further improved through twinning-induced plasticity (TWIP).