Microstructure and mechanical properties of Al-Si-Ni coating on Cu-Cr substrate prepared by multi-permeation and friction stir processing

作     者：Yin Wang Ruidi Li Tiechui Yuan Yin Wang;Ruidi Li;Tiechui Yuan

作者机构：State Key Laboratory of Powder Metallurgy Shenzhen Institute of Central South University Central South University 

出 版 物：《Nano Materials Science》 (纳米材料科学（英文版）)

年 卷 期：2019年第1卷第3期

页      面：224-228页

核心收录：

学科分类：08[工学] 

基　　金：financial support from the National Natural Science Foundation of China (No. 51571214) Science Project of Shenzhen (JCYJ20180508151903646) 

主　　题：Copper-chromium alloy Al-Si-Ni multi-permeation Friction stir processing Microstructure Mechanical properties 

摘      要：The surface of copper-chromium alloy was processed by Al-Si-Ni multi-permeation and friction stir processing,and the microstructure and mechanical properties of the surface layer were tested by scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),microhardness tester and friction testing *** results show that Al,Si and Ni elements are fully permeated into the surface of copper-chromium alloy after multielement co-infiltration and friction stir *** the observation of the microstructures,we found that the reticular structure is fragmented and distributed in the stir zone *** becomes finer and grains *** micro hardness of the copper-chromium alloy increased to 129 HV,44.9%higher than that of the original *** main reasons of microhardness enhancement are solid solution strengthening,fine grains strengthening and dispersion *** friction test results show that the friction coefficient is basically stable at 0.69 and the wear mass is only 0.0017 g after 10 min of friction *** improvement of wear resistance was attributed to the increase of microhardness of the alloy surface.