A gradient surface produced by combined electroplating and incremental frictional sliding

38th Risø International Symposium on Materials Science

Yu, T.^1 ; Hong, C.^1 ; Kitamura, K.^2 ; Tomatsu, K.^3 ; Taniyama, A.^1,2 ; Huang, X.^1 ; Hansen, N.^1

Section for Materials Science and Advanced Characterization, Department of Wind Energy, Riso Campus, Technical University of Denmark, Roskilde

DK-4000, Denmark^1

Advanced Technology Research Laboratories, Nippon Steel and Sumitomo Metal Corporation, 1-8 Fuso-Cho, Hyogo Amagasaki

660-0891, Japan^2

Steel Research Laboratories, Nippon Steel and Sumitomo Metal Corporation, 1-8 Fuso-Cho, Hyogo Amagasaki

660-0891, Japan^3

关键词: Chemical profiles;    Combined treatment;    Friction and wear;    Frictional sliding;    Glow-discharge optical emission spectroscopy;    Gradient surfaces;    Liquid-nitrogen cooling;    Strengthening mechanisms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/219/1/012048/pdf
DOI  :  10.1088/1757-899X/219/1/012048

来源: IOP

【 摘 要 】

A Cu plate was first electroplated with a Ni layer, with a thickness controlled to be between 1 and 2 μm. The coated surface was then deformed by incremental frictional sliding with liquid nitrogen cooling. The combined treatment led to a multifunctional surface with a gradient in strain, chemical content, microstructure, and hardness. The chemical profile was measured by glow-discharge optical emission spectroscopy, showing diffusion of Ni into the heavily deformed Cu layer to a depth of about 40 μm. The microstructure and hardness were characterized and compared with a similarly processed Cu plate without Ni coating, showing a strong effect of the coated layer on the deformation. The experimental results are followed by an analysis of strengthening mechanisms and a discussion of the applicability of the new technique for increasing the durability and lifetime of components exposed to friction and wear, e.g. in wind turbines.