Ti-Zr-Cu-Be four-element amorphous composite with processing hardening capacity and preparation method thereof

An amorphous composite material and work hardening technology, applied in the field of amorphous composite materials, can solve the problems of second phase size and distribution preparation process sensitivity, weak amorphous forming ability, and limit practical application, etc., and achieve significant work hardening ability, Simple Ingredients, High-Intensity Effects

Active Publication Date: 2017-11-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to improve the work hardening properties of amorphous composites, most of the current research focuses on improving the work hardening properties of crystalline phases. For example, in ZrCu-based amorphous composites, the deformation-induced martensitic transformation of ZrCu phase is used to improve the processing of composite materials. Hardening ability, but the amorphous formation ability of this kind of material is relatively weak, and only a few millimeters of samples can be prepared, and the size and distribution of the second phase are extremely sensitive to the preparation process, which limits its practical application

Method used

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  • Ti-Zr-Cu-Be four-element amorphous composite with processing hardening capacity and preparation method thereof
  • Ti-Zr-Cu-Be four-element amorphous composite with processing hardening capacity and preparation method thereof
  • Ti-Zr-Cu-Be four-element amorphous composite with processing hardening capacity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of Ti-Zr-Cu-Be amorphous composite material with dendritic phase volume fraction design value of 6%:

[0045] (1) Using metals with industrial grade purity as raw materials, according to Ti 59.5 Zr 38.3 Cu 2.2 Preparation of master alloy ① according to the composition ratio, specifically, firstly weigh and mix the constituent elements according to the composition ratio to obtain 100g of the metal mixture, put it into the electric arc furnace, and evacuate to 5×10 -4 Pa, then filled with high-purity argon, first smelt and absorb the titanium ingot, then smelt the metal mixture, and repeatedly smelt until the composition is uniform, the smelting current is 200A-700A, and the alloy is made to obtain the intermediate alloy ① ingot;

[0046] (2) Using metals with a purity of above industrial grade (including industrial grade) as raw materials, according to Ti 33.5 Zr 35.5 Cu 8.3 be 22.7 Preparation of master alloy ② according to the composition ratio, speci...

Embodiment 2

[0050] The difference from Example 1 lies in that: the dendrite phase volume fraction is different, and the smelting process is different.

[0051] In this embodiment, the design value of the volume fraction of the dendrite phase is 8% to 90%, as shown in Table 1. During the test, according to the design value of the dendrite phase volume fraction, different weights of master alloy ① and ② mixtures were weighed, and master alloy ingots were prepared by arc melting. When melting, the vacuum degree is 5×10 -3 Pa~5×10 -4 Pa, the melting current is 200A ~ 700A. Amorphous composite samples with dimensions of 6mm×10mm×60mm were prepared by induction melting casting method. During casting, the alloy melt temperature is in the range of 500-600°C above the liquidus line of the amorphous matrix.

[0052] A sample of amorphous composite material with a size of 6mm×10mm×60mm was tested by X-ray analysis, such as figure 1 As shown, it shows that this series is an amorphous composite m...

Embodiment 3

[0054] Using wire cutting, cut the tensile sample, and use the universal testing machine for tensile performance test, the strain rate is 5×10 -4 the s -1 . It can be found that the amorphous composite material has excellent tensile mechanical properties, the tensile strength is 1100MPa-1900MPa, the plasticity is 6%-15%, and remarkable work hardening ability. image 3 Tensile curves of amorphous composites with dendritic phase volume fractions of 40%, 50% and 60% are given. After tensile failure, the sample was detected by XRD and found to contain a large amount of martensitic phase, indicating that the amorphous composite material induced martensitic transformation during the deformation process, resulting in a significant work hardening ability of the amorphous composite material. Figure 4 The X-ray patterns of the amorphous composite material with a volume fraction of 45% before and after deformation are given.

[0055] The tensile sample of the amorphous composite mate...

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Abstract

The invention discloses a Ti-Zr-Cu-Be four-element amorphous composite with the processing hardening capacity and a preparation method thereof. The composite is a type of amorphous alloy composite containing a dendritic crystal phase, wherein the dendritic crystal phase is prepared from the chemical components of 59-60 parts of Ti, 38-39 parts of Zr and 1-3 parts of Cu, the volume fraction of the dendritic crystal phase is 5-95%, and an amorphous matrix is prepared from the chemical components of 33-34 parts of Ti, 35-36 parts of Zr, 8-9 parts of Cu and 21-24 parts of Be. The dendritic crystal phase has the deformation-induced Martensite phase transformation characteristic, the composite shows excellent comprehensive mechanical properties of high strength, high plasticity, processing hardening and the like under the actions of tension and compression loads, for example, under the tension load, the processing hardening behavior is remarkable, the plastic deformation capacity is 6-15%, and the strength is 1100-1900 MPa. Meanwhile, by means of Martensite phase transformation, the composite has the super-elastic characteristic under the tension load through cyclic loading, for example, elastic deformation can be 2.7-3%. As for the composite, the chemical composition is simple, the chemical components of the second phase are relatively stable, and structural design and controllable preparation of the composite are facilitated.

Description

technical field [0001] The invention relates to the technical field of amorphous composite materials, in particular to a Ti-Zr-Cu-Be quaternary amorphous composite material with work hardening ability and a preparation method thereof. Background technique [0002] Amorphous composite materials are a kind of advanced metal materials with the characteristics of both amorphous alloys and crystalline alloys. They have high strength and good plastic deformation because the crystalline phase contained in them can hinder the expansion of shear bands and cause their proliferation. ability has received extensive attention. From the perspective of preparation technology, amorphous composite materials can be divided into two categories: external crystalline phase type and endogenous crystalline phase type amorphous composite materials. According to the reported data, the endogenous tough dendrite phase amorphous composite material has more superior mechanical properties, such as the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/10C22C16/00C22C1/03
CPCC22C1/03C22C16/00C22C45/10C22C1/11
Inventor 朱正旺张海峰付华萌张宏伟王爱民李宏
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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