Effect of Ti on microstructure, mechanical and corrosion properties of(Zr0.55Al0.1Ni0.05Cu0.3)100-xTix bulk metallic glasses
(Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education,
Northeastern University, Shenyang 110819, China)
Northeastern University, Shenyang 110819, China)
Abstract: 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.
Key words: Zr-based bulk metallic glass; Ti; mechanical properties; corrosion