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High-plasticity phase separation Zr-based amorphous alloy and preparation method and application thereof

An amorphous alloy and phase separation technology, applied in the field of bulk amorphous alloys, can solve the problems of limiting the engineering promotion and application of amorphous alloys, the failure to reflect the mechanical properties of fracture toughness, and the decrease of shear bands, etc., to achieve convenient preparation , Improve plasticity at room temperature, cheap price

Pending Publication Date: 2022-06-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if a small number of amorphous alloy systems show a certain plastic deformation ability under compression loading, due to the sharp drop in viscosity near the local shear band, shear softening occurs, and they cannot produce the same work hardening ability as crystalline metal materials, that is, Exhibits work-softening properties in the true stress-strain curve
Therefore, the phenomenon of room temperature brittleness and strain softening has become the "Achilles heel" of amorphous alloys, and its excellent mechanical properties such as high strength and high fracture toughness cannot be reflected in the actual service process, which greatly limits the development of amorphous alloys. Engineering promotion and application as a structural material

Method used

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  • High-plasticity phase separation Zr-based amorphous alloy and preparation method and application thereof
  • High-plasticity phase separation Zr-based amorphous alloy and preparation method and application thereof
  • High-plasticity phase separation Zr-based amorphous alloy and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Preparation and properties of Zr-Cu-Ni-Al bulk amorphous alloy

[0050] Design Zr 60 Cu a Ni b Al 5 Amorphous alloy composition, where a = 5, 10, 15, 20, 25, 30; b = 35-a. The resulting composition is Zr 60 Cu 5 Ni 30 Al 5 , Zr 60 Cu 10 Ni 25 Al 5 , Zr 60 Cu 15 Ni 20 Al 5 , Zr 60 Cu 20 Ni 15 Al 5 , Zr 60 Cu 25 Ni 10 Al 5 and Zr 60 Cu 30 Ni 5 Al 5 alloy.

[0051] like figure 1 and figure 2 shown as Zr 60 Cu 5 Ni 30 Al 5 , Zr 60 Cu 10 Ni 25 Al 5 , Zr 60 Cu 15 Ni 20 Al 5 , Zr 60 Cu 20 Ni 15 Al 5 , Zr 60 Cu 25 Ni 10 Al 5 and Zr 60 Cu 30 Ni 5 Al 5 The X-ray diffraction (XRD) patterns of 2mm and 3mm alloy samples show that all components can form a single amorphous sample with a diameter of 2mm, and most components can form a single amorphous sample with a diameter of 3mm.

[0052] Zr 60 Cu 20 Ni 15 Al 5 The compressive stress-strain curve of the alloy 2mm specimen is shown in 3. It can be seen that the al...

Embodiment 2

[0054] Example 2: Preparation and properties of Zr-Cu-Fe-Al bulk amorphous alloy

[0055] Design Zr 60 Cu 20 Fe 15 Al 5 Amorphous alloy composition. like Image 6 The X-ray diffraction (XRD) pattern of its 2 mm sample is shown, and the pattern indicates that the composition can form a single amorphous sample of 2 mm diameter. The compressive stress-strain curve of the alloy 2mm sample is shown in 7, and it can be seen that its plastic deformation capacity can reach 10%.

Embodiment 3

[0056] Example 3: Preparation and properties of Zr-Cu-Ni-Fe-Al bulk amorphous alloy

[0057] Design Zr 60 Cu 20 Ni 14 Fe 1 Al 5 Amorphous alloy composition. like Figure 8 The X-ray diffraction (XRD) pattern of its 2 mm sample is shown, and the pattern indicates that the composition can form a single amorphous sample of 2 mm diameter. The compressive stress-strain curve of the alloy 2mm sample is shown in 9, and it can be seen that its plastic deformation capacity can reach 10%.

[0058] Design Zr 60 Cu 20 Ni 10 Fe 5 Al 5 Amorphous alloy composition. like Figure 10 Shown is the X-ray diffraction (XRD) pattern of its 3 mm sample, which indicates that the composition can form a single amorphous sample of 3 mm diameter. The compressive stress-strain curve of the alloy 2mm specimen is shown in 11, and it can be seen that its plastic deformation capacity can reach 15%.

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Abstract

The invention belongs to the field of bulk amorphous alloys, and relates to a high-plasticity phase separation Zr-based amorphous alloy and a preparation method and application thereof.The component atomic percent expression of the amorphous alloy is ZraCubMcAld, a is larger than or equal to 55 and smaller than or equal to 60, b is larger than or equal to 5 and smaller than or equal to 35, c is larger than or equal to 5 and smaller than or equal to 35, d is larger than or equal to 5 and smaller than or equal to 8, and a + b + c + d = 100; m is one or more of Ni, Fe and Co (in any proportion); the bulk Zr-based amorphous alloy with the diameter not smaller than 2 mm can be prepared through electric arc melting and copper mold suction casting methods. The Zr-based amorphous alloy has the beneficial effects that due to the introduction of positive mixing enthalpy components in the Zr-based amorphous alloy, the structural non-uniformity of an as-cast structure of an alloy system can be improved by utilizing the mutual repulsive interaction among immiscible components, so that the room-temperature plasticity of the Zr-based amorphous alloy is remarkably improved, and the compression plasticity of the Zr-based amorphous alloy is not lower than 10%.

Description

technical field [0001] The invention belongs to the field of bulk amorphous alloys, and in particular relates to a high-plastic phase-separated Zr-based amorphous alloy and a preparation method and application thereof. [0002] technical background [0003] Different from the plastic deformation of crystalline metals by the mechanism of dislocation or twinning deformation, the room temperature plastic deformation of amorphous alloys is mainly carried out by highly localized shearing. After the material yields, the plastic deformation is mainly concentrated in a limited number of The shear band with an initial thickness of only tens of nanometers cannot withstand subsequent loading and often exhibits catastrophic brittle fracture characteristics. Even if a few amorphous alloy systems show a certain plastic deformation ability under compressive loading, due to the sharp drop in viscosity near the local shear band and shear softening, they cannot produce the same work hardening ...

Claims

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Application Information

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IPC IPC(8): C22C45/10C22C1/00
CPCC22C45/10C22C1/11
Inventor 吴渊张英杰夏洋王辉刘雄军蒋虽合吕昭平
Owner UNIV OF SCI & TECH BEIJING
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