公开(公告)号：US20210147991A1

公开(公告)日：2021-05-20

申请号：US17044617

申请日：2018-09-20

申请人： INSTITUTE OF METAL RESEARCH, CHINESE ACADEMY OF SCIENCES

发明人： Lei LU ,  Zhao CHENG ,  Shuai JIN

IPC分类号： C25C1/12 ,  C25C7/06

摘要： A method for improving mechanical properties by changing a gradient nanotwinned structure of metallic materials is the technical field of nanostructured metallic materials. The method uses the inherent principles of microstructure and mechanical properties of metallic materials to improve materials mechanical properties. The metallic materials has a gradient nanotwinned structure. The principles of microstructure and mechanical properties of the metallic materials mean that the mechanical properties of the metallic materials are adjusted by changing the structural gradient scale of the nanotwinned structure. The method combines two strengthening methods of nanotwins and gradient structure, and can obviously improve the mechanical properties of the metallic materials. For pure copper materials of the gradient nanotwinned structure prepared by an electrodeposition technology: the yield strength is 481±15 MPa, the tensile strength is 520±12 MPa, the uniform elongation can be 7±0.5%, and the elongation to failure can be 11.7±1.3%.