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A method to improve the mechanical properties of amorphous endogenous composites by driving the recovery of amorphous matrix structure through the shape memory effect

A memory effect, composite material technology, applied in the field of amorphous alloys and endogenous composite materials, can solve the problems of insufficient softening effect, weak hardening ability, etc., to achieve simple implementation, significant improvement in mechanical properties, and improved mechanical properties. Effect

Active Publication Date: 2021-11-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

The endogenous β phase in β-type amorphous endogenous composites is usually a stable phase, and its plastic deformation mode is a dislocation mechanism, resulting in relatively weak hardening ability, which is not enough to compensate for the softening caused by the initiation and expansion of shear bands in the amorphous matrix effect, so most of the β-type amorphous endogenous composites show the phenomenon of processing softening, which also limits the application of such materials

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  • A method to improve the mechanical properties of amorphous endogenous composites by driving the recovery of amorphous matrix structure through the shape memory effect
  • A method to improve the mechanical properties of amorphous endogenous composites by driving the recovery of amorphous matrix structure through the shape memory effect
  • A method to improve the mechanical properties of amorphous endogenous composites by driving the recovery of amorphous matrix structure through the shape memory effect

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Embodiment 1

[0050] In this embodiment, the production diameter is 12 mm by the copper mold casting, and the nominal component is Ti. 47.4 ZR 34 Cu 6 Bo 12.6 Amorphous endogenous composite material, X-ray diffractive spectrum and scanning electron microscopy figure 1 Indicated. The ingredients of the endogenous metample β are Ti 63.2 ZR 34.7 Cu 2.1 Uniformly distributed among the amorphous substrates in the amorphous matrix, and the volume fraction is about 60%. From the alloy rod tab, the tensile tensile sample is tested, the length of the drawing sample is 14 mm × 2 mm × 0.8 mm. The strain rate of the tensile test is 5 × 10 -4 s -1 . Ti 47.4 ZR 34 Cu 6 Bo 12.6 The tensile stress of the amorphous endogenous composite material - strain curve image 3 As shown, its yield strength is approximately 780 MPa, and the tensile processing hardening capacity is exhibited after yield, and the stretch breakage strain is 7.2 ± 0.2%. Ti 47.4 ZR 34 Cu 6 Bo 12.6 Amorphous internal composites are very good for...

Embodiment 2

[0053] In this embodiment, the production diameter is 12 mm by the copper mold casting, and the nominal component is Ti. 47.4 ZR 34 Cu 6 Bo 12.6 Amorphous endogenous composite material, X-ray diffractive spectrum and scanning electron microscopy figure 1 Indicated. The ingredients of the endogenous metample β are Ti 63.2 ZR 34.7 Cu 2.1 Uniformly distributed among the amorphous substrates in the amorphous matrix, and the volume fraction is about 60%. From the alloy rod tab, the tensile tensile sample is tested, the length of the drawing sample is 14 mm × 2 mm × 0.8 mm. The strain rate of the tensile test is 5 × 10 -4 s -1 . Ti 47.4 ZR 34 Cu 6 Bo 12.6 The tensile stress of the amorphous endogenous composite material - strain curve image 3 As shown, its yield strength is about 780 MPa, and the tensile processing hardening capacity is demonstrated, and the tensile breaking strain is 7.2 ± 0.2% (see attached. image 3 . Ti 47.4 ZR 34 Cu 6 Bo 12.6 Amorphous internal composites are very g...

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Abstract

The invention relates to a method for improving the mechanical properties of an amorphous endogenous composite material through recovery of an amorphous matrix structure, and belongs to the field of amorphous alloys and endogenous composite materials. The microstructure characteristics of this kind of amorphous endogenous composite material are: the endogenous crystalline phase with reversible phase transition is distributed in the amorphous matrix. Under tensile loading, such amorphous endogenous composites exhibit superelasticity, i.e. complete shape recovery after small strain unloading. Through tensile cyclic loading at small strains, the amorphous matrix phase in the amorphous endogenous composites undergoes structural recovery driven by the "shape memory effect". The structurally restored amorphous matrix can lead to a significant improvement in the mechanical properties of amorphous endogenous composites, including improved tensile plasticity and prolonged work-hardening stages. This method can improve the mechanical properties of the amorphous endogenous composite material, and then expand its practical application as a structural material, which has important social and economic benefits.

Description

Technical field [0001] The present invention relates to a method of recovering the mechanical properties of amorphous endogenic composites by amorphous matrix structure, including microstructure characteristics and mechanical properties, amorphous matrix structural reply mechanism and implementation methods, Amorphous alloy and its endogenous composites. Background technique [0002] The amorphous alloy has excellent mechanical properties such as high strength, high hardness, large elasticity, and has a broad application of structural materials. However, the block-shaped amorphous alloy has no macroscopic stretched plasticity at room temperature, which seriously limits the amorphous alloy as a wide range of application of structural materials. Studies have shown that the energy state and structure of amorphous alloys are closely related to their mechanical properties. Amorphous alloys are thermodynamically metastable states, which will undergo less energy states, and higher state...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18C22C45/10
CPCC22C45/10C22F1/006C22F1/18
Inventor 张龙张海峰朱正旺张宏伟付华萌李宏王爱民
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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