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Shape memory alloy particle reinforced light metal-based composite material and preparation method thereof

A memory alloy and particle reinforcement technology, applied in the field of metal materials, can solve the problems of difficult to prepare bulk composite materials and unsatisfactory particle distribution uniformity in composite materials, and achieve uniform particle distribution, shape memory effect damping performance, and excellent damping. performance effect

Inactive Publication Date: 2011-06-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the uniformity of particle distribution in the composite material prepared by this method is not ideal, and it is difficult to prepare large-sized bulk composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Low volume fraction, large-size NiTi reinforced aluminum composite material manufacturing process: Drill a series of small holes perpendicular to the surface of the plate and arranged in a straight line on the 6061 aluminum plate. The diameter of the holes is 2 mm, the depth is 5 mm, and the distance between the centers of the holes is 3mm. NiTi particles with a diameter of 150-178 microns were loaded into the holes for compaction, and four passes of FSP were performed under the conditions of a rotating speed of 600 rpm and a traveling speed of 100 mm / min. The thickness of the obtained composite material is 5 mm, the volume fraction of NiTi particles is 5%, the distribution is very uniform, the combination with the aluminum matrix is ​​good, and there is no reactant at the particle / matrix interface. The material has shape memory properties and better damping performance than the parent material.

Embodiment 2

[0018] High volume fraction, large size NiTi reinforced aluminum composite material manufacturing process: Drill a series of small holes perpendicular to the surface of the plate and arranged in a straight line on the 6061 aluminum plate. The diameter of the holes is 4 mm, the depth is 5 mm, and the distance between the centers of the holes is 5 mm. NiTi particles with a diameter of 150-178 microns were loaded into the holes for compaction, and four passes of FSP were performed under the conditions of a rotating speed of 600 rpm and a traveling speed of 100 mm / min. The thickness of the obtained composite material is 5 mm, the volume fraction of NiTi particles is 10%, the distribution is very uniform, the combination with the aluminum matrix is ​​good, and there is no reactant at the particle / matrix interface. The material has shape memory properties and better damping performance than the parent material. The start and end temperatures of martensite transformation are 14.5°C ...

Embodiment 3

[0020] High volume fraction, small size NiTi reinforced aluminum composite material manufacturing process: Drill a series of small holes perpendicular to the surface of the plate and arranged in a straight line on the 6061 aluminum plate. The diameter of the holes is 4 mm, the depth is 5 mm, and the distance between the centers of the holes is 5 mm. NiTi particles with a diameter of 0.5-74 microns were packed into the holes for compaction, and two passes of FSP were performed under the conditions of a rotating speed of 800 rpm and a traveling speed of 100 mm / min. The thickness of the obtained composite material is 5 mm, the volume fraction of NiTi particles is 12%, the distribution is very uniform, and it is well combined with the aluminum matrix, and there is no reactant at the particle / matrix interface. The material has shape memory properties and better damping performance than the parent material.

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Abstract

The invention provides a shape memory alloy particle reinforced light metal-based composite material and a preparation method thereof. The composite material comprises a substrate and shape memory alloy particles, wherein the volume content of the shape memory alloy particles is 5-40% and the thickness of the composite material is 2-20 millimeters. The method is characterized by prearranging the shape memory alloy particles in an aluminium alloy or magnesium alloy plate by adopting the dot matrix porous particle prearranging mode to prepare the shape memory alloy particle reinforced light metal-based composite material through the friction stir processing technology. The composite material has the following advantages: the particles in the composite material are uniformly distributed; the interface between the particles and the substrate is clean and no reactants are generated on the interface; and the composite material has the shape memory effect and excellent damping property.

Description

technical field [0001] The invention relates to metal materials, and in particular provides a shape memory alloy particle reinforced light metal matrix composite material and a preparation method thereof. Background technique [0002] Shape memory alloys have a special shape memory effect, that is, a material deformed by force undergoes a martensite-austenite transformation after undergoing a temperature change and returns to its original shape. This effect makes this type of material a research hotspot in the field of smart materials, and it is a high-quality material for the preparation of sensors and actuators, with broad application prospects. Co-based, Zr-based, Ni-Al-based, Ni-Ti-based, Ni-Mn-based, Ti-Pt-based, Ta-Ru-based, Nb-Ru-based, Ni-Mn-Ga-based, Fe-Mn-based have been developed -Si-based, Cu-Al-Ni-based and other shape memory alloys. [0003] Due to the high density of shape memory alloys, its application in space structures is limited. Reducing the density o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C23/00C22C1/00
Inventor 马宗义倪丁瑞肖伯律王继杰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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