Effect of Er on Structure, Mechanical Properties, Thermal Stability and Amorphous Forming Ability of ZrCuNiAl Amorphous Alloy

Abstract

Focusing on (Zr0.6336Cu0.1452Ni0.1012Al0.12)100-xErx(x=0,0.5,1,1.5,2,2.5,3,atom fraction) bulk amorphous alloys, the effect of Er on the structure, mechanical properties, thermal stability and amorphous forming ability of amorphous alloys was studied by changing the content of trace element of Er. The results show that all the samples are completely amorphous alloys after the addition of Er element. With the increase of the content of Er, the elastic modulus of each sample increases firstly and then decreases, and the compressive plastic strain is stepped up, and the plastic strain of samples at x=0,x=0.5 and x=1 is fluctuating in the range of 4%; the plastic strain of samples at x=1.5,x=2,x=2.5 in the range of 11%; the plastic strain of samples at x=3 is the highest, its value is 23.19%, the elastic modulus is 37.76GPa, the yield strength is 1604MPa, the compressive strength is 2068MPa, the fracture strength is 2060MPa. With the increase of Er content, the thermal stability of Zr based amorphous alloys and amorphous formation ability decrease firstly and then increase.

Keywords

• bulk amorphous alloy
• glass forming ability
• mechanical property
• thermal stability