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Ti-based amorphous endogenous composite material with tensile plasticity and shear deformation mode

A technology of amorphous composite materials and shear deformation, which is applied in the field of Ti-based amorphous endogenous composite materials, can solve problems such as fracture and uniform deformation of amorphous composite materials, and achieve low price, high strength, important industrial application prospects and The effect of economic value

Active Publication Date: 2021-09-28
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

[0006] The purpose of the present invention is to provide a class of Ti-based amorphous endogenous composite materials with both tensile plasticity and shear deformation modes, to solve the problem of the plastic deformation mechanism of the endogenous crystalline state in the prior art amorphous composite materials inhibiting the formation of the amorphous matrix. Expansion of shear bands, resulting in uniform deformation of amorphous composites and fractures in planes perpendicular to the direction of tensile loading

Method used

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  • Ti-based amorphous endogenous composite material with tensile plasticity and shear deformation mode
  • Ti-based amorphous endogenous composite material with tensile plasticity and shear deformation mode
  • Ti-based amorphous endogenous composite material with tensile plasticity and shear deformation mode

Examples

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Effect test

Embodiment 1

[0064] Will be nominal composition according to Ti 45.7 Zr 33 Cu 5.8 co 3 be 12.5 (The components are all molar ratios) 80g of metal materials of pure Ti, Zr, Cu, Co and Be are placed in a water-cooled copper crucible of an electric arc melting furnace. Close the vacuum chamber and start vacuuming until the vacuum is better than 5×10 -3 Pa (this embodiment is 3×10 -3 Pa), filled with high-purity argon to ~5×10 -4 Pa. The arc is started in an argon environment to first melt pure Ti and further remove the oxygen content in the vacuum chamber. Then start to melt the metal mixture, and make full use of the diffusion of components at high temperature to melt the alloy. After the alloy has cooled, it is inverted in a water-cooled copper crucible and melted again. Melting was repeated four times in this way to obtain a master alloy. The master alloy is crushed and placed in the sample casting equipment. After the alloy is arc-melted, the alloy melt is turned over into a cop...

Embodiment 2

[0069] Will be nominal composition according to Ti 45.7 Zr 33 Cu 5.8 co 3 be 12.5 (The components are all molar ratios) 100g of metal materials of pure Ti, Zr, Cu, Co and Be are placed in a water-cooled copper crucible of an electric arc melting furnace. Close the vacuum chamber and start vacuuming until the vacuum is better than 5×10 -3 Pa (this embodiment is 2×10 -3 Pa), filled with high-purity argon to ~5×10 -4 Pa. The arc is started in an argon environment to first melt pure Ti and further remove the oxygen content in the vacuum chamber. Then start to melt the metal mixture, and make full use of the diffusion of components at high temperature to melt the alloy. After the alloy has cooled, it is inverted in a water-cooled copper crucible and melted again. Melting was repeated four times in this way to obtain a master alloy. The master alloy is crushed and placed in the sample casting equipment. After the alloy is arc-melted, the alloy melt is turned over into a co...

Embodiment 3

[0074] Will be nominal composition according to Ti 49.2 Zr 33.7 Cu 5 co 2.5 be 9.6 (The components are all molar ratios) 80g of metal materials of pure Ti, Zr, Cu, Co and Be are placed in a water-cooled copper crucible of an electric arc melting furnace. Close the vacuum chamber and start vacuuming until the vacuum is better than 5×10 -3 Pa (this embodiment is 1×10 -3 Pa), filled with high-purity argon to ~5×10 -4 Pa. The arc is started in an argon environment to first melt pure Ti and further remove the oxygen content in the vacuum chamber. Then start to melt the metal mixture, and make full use of the diffusion of components at high temperature to melt the alloy. After the alloy has cooled, it is inverted in a water-cooled copper crucible and melted again. Melting was repeated four times in this way to obtain a master alloy. The master alloy is crushed and placed in the sample casting equipment. After the alloy is arc-melted, the alloy melt is turned over into a co...

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Abstract

The invention relates to a Ti-based amorphous endogenous composite material with tensile plasticity and a shear deformation mode. The Ti-based amorphous endogenous composite material comprises a microstructure characteristic, a deformation mechanism and a preparation method, and belongs to the field of amorphous alloys and composite materials thereof. The microstructure characteristic of the Ti-based amorphous composite material is that an endogenous metastable beta-Ti phase is distributed in an amorphous matrix. Under the action of tensile load, the Ti-based amorphous composite material has tensile plasticity and work hardening capacity after being yielded. The amorphous composite material has the characteristic of work softening after passing through the highest tensile strength and is accompanied by a gradually obvious sawtooth rheological behavior, the microscopic deformation mechanism of the amorphous composite material is that an omega-Ti band is generated in an endogenous beta phase, and the omega-Ti band and a shear band in the amorphous matrix have the same thickness. The collaborative shear deformation of the shear band and the omega-Ti deformation band can quickly penetrate through local beta dendrites but can be inhibited by nearby beta dendrites with different orientations, so that a sawtooth behavior appears on a stress-strain curve.

Description

technical field [0001] The invention relates to a class of Ti-based amorphous endogenous composite materials with tensile plasticity and shear deformation modes, including its microstructure characteristics, deformation mechanism and preparation method, and belongs to the field of amorphous alloys and their composite materials. Background technique [0002] Amorphous alloys have high strength, large elastic limit, are rich in chemically active elements, and are able to maintain "self-sharpening" due to the destruction caused by the rapid expansion of shear bands during deformation. These excellent properties make amorphous alloys widely used in some specific fields. However, due to the rapid expansion of the shear band in the deformation process of single-phase amorphous alloys, the material usually has no macroscopic plasticity, especially tensile plasticity, and the fracture toughness of the material is usually not good. Amorphous endogenous composites can be obtained by ...

Claims

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Application Information

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IPC IPC(8): C22C45/10C22F1/18C22C1/02C22C14/00C22C16/00
CPCC22C45/10C22F1/183C22F1/186C22C1/02C22C14/00C22C16/00C22C1/11
Inventor 张龙张海峰张宏伟付华萌李宏朱正旺王爱民
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI