Wear Performance and Corrosion Behavior of Nano-SiCp-Reinforced AlSi7Mg Composite Prepared by Selective Laser Melting  

作　　者：Min Wang Yuanjie Zhang Bo Song Qingsong Wei Yusheng Shi 

机构地区：[1]State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2021年第9期1213-1222,共10页金属学报（英文版）

基　　金：financially supported by the Natural and Science Foundation of China(Grant Nos.51775208,51922044);the Hubei Science Fund for Distinguished Young Scholars(No.0216110085);the National Key Research and Development Program“Additive Manufacturing and Laser Manufacturing”(No.2016YFB1100101);the Wuhan Plan of Science and Technology(No.2018010401011281);the Academic Frontier Youth Team(Nos.2017QYTD06,2018QYTD04)at Huazhong University of Science and Technology(HUST)。

摘　　要：It is one of the future trends to create materials in situ by laser additive manufacturing. AlSi7Mg/nano-SiCp composites were successfully in situ prepared by selective laser melting in our previous study. After adding 2 wt% nano-SiC particles, the tensile stress and strain increased to 502.94 ± 6.40 MPa and 10.64 ± 1.06%, respectively. For the first time in the present study, we systematically studied and compared the wear performance and corrosion behavior of AlSi7Mg with its composite. We conducted the ball-on-fl at frictional wear test at room temperature, potentiodynamic polarization, electrochemical impedance spectroscopy(EIS), and the immersion corrosion tests in 3.5 wt% NaCl solution. The results showed that composite had higher wear resistance, while AlSi7Mg was more resistant to pitting corrosion. However, the further pitting corrosion of composite was restrained because of the in situ phase nano-Al4C3 and the residual nano-SiCp.

关 键 词：Selective laser melting AlSi7Mg composite Wear performance Corrosion behavior 

分 类 号：TB333[一般工业技术—材料科学与工程]