Effect of Ti on microstructure, mechanical and corrosion properties of (Zr0.55Al0.1Ni0.05Cu0.3)100–xTix bulk metallic glasses

The (Zr0.55Al0.1Ni0.05Cu0.3)100–xTix alloys were prepared using an in-situ suck-casting method in a copper mold. The effects of Ti addition on the microstructure, mechanical and corrosion properties of the (Zr0.55Al0.1Ni0.05Cu0.3)100–xTix alloys were investigated by X-ray diffraction, scanning electron microscopy, compressive tests and corrosion tests. It has been found that the addition of Ti higher than 4% (mole fraction) causes the formation of many crystalline phases in the alloy. The alloys with 1%–3%Ti display an obvious yield stage on their compressive stress–strain curves. An appropriate addition of Ti can improve the strength and ductility of the alloys. All the alloys have high corrosion resistance in 1 mol/L NaOH solution, and are corroded in 1 mol/L HCl solution. However, the appropriate addition of Ti can significantly improve the corrosion resistance of the alloys in HCl solution.