A high-strength and high-toughness dendrite-reinforced titanium-based metallic glass composite

Abstract

The invention discloses a dendritic crystal reinforced titanium-based metal glass composite high in strength and tenacity. Ti44Zr20V12Cu5Be19 serves as a model material of metal glass. A beta stable element Mo is used for replacing an element V, the atomic percents of other elements are adjusted, and the atomic percent expression of alloy components is TiaZrbMocCudBee, wherein 40<=a<=50, 21<=b<=30, 3<=c<=8, 4<=d<=16, 8<=e<=20, and a+b+c+d+e=100. Titanium-based metal glass serves as a matrix phase, and the chemical components of the matrix phase are Ti23-28Zr30-34Mo0.5-2Cu10-20Be25-33 by atomic percent. A titanium-based dendritic crystal with a body-centered cubic structure serves as a wild phase, the chemical components of the wild phase are Ti60-70Zr17-22Mo8-12Cu3-8 by atomic percent, and the volume fraction of the wild phase ranges from 50% to 70%. The dendritic crystal reinforced titanium-based metal glass composite has the beneficial effects that the yield strength reaches 1,800 MPa, the tensile plastic strain reaches 17.4%, the tensile percentage reduction of area exceeds 49%, and the yield strength, the tensile plastic strain and the tensile percentage reduction of area are all higher than those of an existing dendritic crystal reinforced zirconium-based or titanium-based metal glass composite.

Description

technical field [0001] The invention belongs to the field of metallic glass and its composite material, in particular to a high-strength and high-toughness dendrite-reinforced titanium-based metallic glass composite material. Background technique [0002] Metallic glass materials have excellent properties such as high strength, large elastic deformation, high hardness, wear resistance and corrosion resistance, and are potentially excellent structural materials. At present, metallic glass materials have been successfully applied to high-end sports equipment such as golf heads, baseballs, and tennis rackets. Also, due to its good wear resistance and near-net formability, it is also used as housings for consumer electronic devices. However, the deformation of metallic glass at room temperature is concentrated in one or several narrow shear bands, and once the shear bands are formed, they will expand rapidly, resulting in catastrophic failure, the tensile elongation is almost z...

AI Technical Summary

Problems solved by technology

Although the plasticizing effect of the above-mentioned composite material is remarkable, because the strength of the plastic solid solution phase is much lower than that of the metallic glass matrix, the strength of the composite material is greatly reduced. The yield strength of the dendritic reinforced metallic glass composite material containing Nb is up to 1500 MPa, while The yield strength of the dendrite-reinforced metallic glass composite containing V is up to 1600 MPa, both of which are lower than the yield strength of the titanium-based metallic glass matrix of 1800 MPa

[0004] At present, there is no zirconium-titanium-based dendrite-reinforced metallic glass composite with the addition of β-stable element Mo in the prior art, mainly because the addition of β-stable element Mo will seriously affect the formation ability of metallic glass, although body-centered cubic Zirconium-titanium-based dendrite phase, but amorphous metallic glass matrix cannot be obtained, therefore, dendrite-enhanced zirconium-titanium-based metallic glass composites cannot be obtained