Microstructure and corrosion properties of aluminum matrix composite reinforced with al-based amorphous

The microstructure and corrosion properties of a novel Al-based amorphous reinforced aluminum matrix composite fabricated by friction stir processing (FSP) were studied by scanning electron microscope (SEM), transmission electron microscope (TEM) and electrochemical corrosion test methods. The test results show that the composite exhibits the typical layered structure with a combination of the base metal and the amorphous strip via the FSP, and shows a large amount of nanosized ultrafine structure which are mainly composed of the α-Al and α-Al amorphous structure with Al-Cu-Mg series precipated phase existing in the composite. The tensile strength of composite is improved a lot compared with the base metal. The electrochemical corrosion behavior of the composite with amorphous strip is also improved compared with that without amorphous strip, but, in both cases, the corrosion bebaviour is lower than the base metal. ©, 2015, Cailiao Gongcheng/Journal of Materials Engineering. All right reserved.