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Endogenous-phase titanium-based amorphous composite material with improved strength and plasticity and preparation method thereof

A technology for improving the strength of amorphous composite materials, applied in the field of endogenous phase titanium-based amorphous composite materials, can solve the problems of material softening, no obvious plastic deformation, softening shear plane fracture, etc., and achieve large amorphous formation ability, Excellent mechanical properties, the effect of avoiding component segregation

Inactive Publication Date: 2015-01-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to shear localization and strain softening, the plastic deformation of most amorphous alloys has localized shear characteristics. During the deformation process, the adiabatic shear can easily cause the material in the area around the main shear zone to soften, which eventually leads to Fracture occurs on the softened shear plane, that is, a brittle fracture mode dominated by a single shear band; macroscopically, since the deformation occurs in a very small area, it appears as a catastrophic failure without obvious plastic deformation

Method used

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  • Endogenous-phase titanium-based amorphous composite material with improved strength and plasticity and preparation method thereof
  • Endogenous-phase titanium-based amorphous composite material with improved strength and plasticity and preparation method thereof
  • Endogenous-phase titanium-based amorphous composite material with improved strength and plasticity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The atomic ratio composition described in this example is: Ti: 44.55%; Zr: 21.78%; Nb: 9.9%; Cu: 7.92%; Be: 14.85%; Ag: 1% endogenous phase titanium-based amorphous composite material .

[0046] The preparation process of an endogenous phase titanium-based amorphous composite material with improved strength and plasticity according to the present invention is as follows:

[0047] The first step, the preparation of raw materials:

[0048] The prepared raw materials were ultrasonically cleaned in acetone and alcohol for about 20 minutes respectively to ensure that the raw materials were clean and free of impurities.

[0049] The second step is to prepare the master alloy ingot:

[0050] Place the prepared raw materials in a water-cooled copper crucible and vacuumize to 2.5×10 -3 Pa filled with 0.03-0.05Mpa inert protective gas argon, first smelt the titanium block in the crucible to absorb oxygen; when smelting, use a small current to melt the unfused block slowly, and...

Embodiment 2

[0057] The atomic ratio composition described in this embodiment is: Ti: 45%; Zr: 22%; Nb: 10%; Cu: 8%; Be: 15% endogenous titanium-based amorphous composite material.

[0058] The preparation process of the endogenous titanium-based amorphous composite material with improved strength and plasticity described in the present invention is the same as that described in Example 1.

[0059] Cut the obtained endogenous phase Ti-based amorphous composite alloy rod into Cylindrical samples were subjected to X-ray diffraction, metallographic observation and quasi-static compression tests.

[0060] The experimental results are: Figure 6 As shown, in addition to the diffuse amorphous diffraction peaks at 30-50° in the XRD pattern, there are relatively sharp diffraction peaks corresponding to the β-Ti(Zr, Nb) crystal state with a body-centered cubic structure; Figure 7 It is the metallographic structure of the endogenous phase titanium-based amorphous composite material with the atom...

Embodiment 3

[0062] The atomic ratio composition described in this implementation example is: Ti: 43.65%; Zr: 21.34%; Nb: 9.7%; Cu: 7.76%; Be: 14.55%; Ag: 3% endogenous titanium-based amorphous composite material .

[0063] The preparation process of the endogenous titanium-based amorphous composite material with improved strength and plasticity described in the present invention is the same as that described in Example 1.

[0064] The experimental results are: Figure 9 As shown, in addition to the diffuse amorphous diffraction peaks at 30-50° in the XRD pattern, there are relatively sharp diffraction peaks corresponding to the β-Ti(Zr, Nb) crystal state with a body-centered cubic structure; Figure 10 It is the metallographic structure of the endogenous phase titanium-based amorphous composite material of the atomic ratio described in Example 3: the β-Ti (Zr, Nb) crystal phase is evenly distributed on the light-colored amorphous substrate, and is analyzed by image analysis software The...

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Abstract

The invention relates to the field of the amorphous composite materials and provides an endogenous-phase titanium-based amorphous composite material with improved strength and plasticity and a preparation method thereof. The composite material is composed of the following elements in atomic proportions: Ti44.55Zr21.78Nb9.9Cu7.92Be14.85Ag1 (at%). The preparation method comprises the steps of preparing raw materials, preparing a master alloy ingot, and preparing the endogenous-phase titanium-based amorphous composite material by use of a spray-casting method based on a copper mold, and specifically comprises the following steps: 1) grinding one end of a quartz tube into a round hole of the appropriate size, cutting the prepared master alloy ingot into cubes and putting the cubes into the quartz tube; 2) fixing the quartz tube into an induction coil in a cavity; 3) vacuumizing the cavity and filling the cavity with a protective inert gas; and 4) melting the alloy cubes in the quartz tube by use of the induction coil and spraying the melt into the copper mold to obtain the endogenous-phase titanium-based amorphous composite material. The preparation method is simple, convenient to operate, and capable of obtaining the large-size bulk titanium-based amorphous composite material, and thus has an excellent application value.

Description

technical field [0001] The invention relates to the field of endogenous phase titanium-based amorphous composite materials, in particular to an endogenous phase titanium-based amorphous composite material with improved strength and plasticity and a preparation method thereof. Background technique [0002] Titanium-based amorphous alloys have low density, relatively low cost, and excellent mechanical properties such as high strength and high hardness. They have important applications in the fields of aviation, aerospace, sports equipment, and medical equipment. However, due to shear localization and strain softening, the plastic deformation of most amorphous alloys has localized shear characteristics. During the deformation process, the adiabatic shear can easily cause the material in the area around the main shear zone to soften, which eventually leads to Fracture occurs on the softened shear plane, that is, a brittle fracture mode dominated by a single shear band; macroscop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/10C22C1/03
Inventor 程焕武沈永华薛云飞陈文佳王鲁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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