Cavitation-erosion mechanism of laser cladded SiC particle reinforced metal matrix
composite
composite
(1. College of Materials Science & Engineering, Shenyang University of Technology,
Shenyang 110023, China;
2. State Key Lab for Corrosion & Protection, The Chinese Academy of Sciences,
Shenyang 110016, China;
3. College of Materials & Metallurgy, Northeastern University,
Shenyang 110004, China;
4. Department of Industrial & Systems Engineering,
Hong Kong Polytechnic University,Hong Kong, China)
Shenyang 110023, China;
2. State Key Lab for Corrosion & Protection, The Chinese Academy of Sciences,
Shenyang 110016, China;
3. College of Materials & Metallurgy, Northeastern University,
Shenyang 110004, China;
4. Department of Industrial & Systems Engineering,
Hong Kong Polytechnic University,Hong Kong, China)
Abstract: With 2kW continuous wave Nd-YAG laser, SiC ceramic powder was laser-cladded on the AA6061 aluminium alloy surface. Within the range of process parameters investigated, the parameters were optimized to produce the SiCp reinforced metal matrix composites(MMC) modified layer on AA6061 alloy surface. After being treated, the modified layer is crack-free, porosity-free, and has good metallurgical bond with the substrate. The microstructure and chemical composition of the modified layer were analyzed by such detection devices as scanning electronic microscope (SEM-EDX) and X-ray diffractometer(XRD). The performance of electrochemical corrosion and cavitation erosion and their mechanism were estimated by the microhardness tester, potentiostat and ultrasonic-induced cavitation device.
Key words: aluminium alloy; laser-cladding; particle reinforced metal matrix composite; cavitation erosion