A kind of low density, super high specific yield strength mg-ni-ti-al quaternary alloy and preparation method thereof

A yield strength, quaternary alloy technology, applied in the field of multi-element alloy materials and their processing, can solve the problems of low absolute value of strength and low matrix strength

Active Publication Date: 2021-07-06
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the deformation and fracture characteristics of Mg-8Al-0.5Zn alloy are affected by Mg 17 al 12 The influence of phase is strong, but the strength of the matrix is ​​still not high; the long-range ordered precipitation dispersed in the Mg-Y-Ni alloy has a significantly enhanced performance compared with the magnesium alloy, and its strength can reach 200MPa, but it contains high-cost rare earth elements ( Y) and the absolute value of its intensity is still not high

Method used

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  • A kind of low density, super high specific yield strength mg-ni-ti-al quaternary alloy and preparation method thereof
  • A kind of low density, super high specific yield strength mg-ni-ti-al quaternary alloy and preparation method thereof
  • A kind of low density, super high specific yield strength mg-ni-ti-al quaternary alloy and preparation method thereof

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Embodiment 1

[0044] A kind of low density, ultra-high specific yield strength Mg-Ni-Ti-Al quaternary alloy of the present embodiment, the chemical composition of described alloy is expressed as Mg by atomic ratio 1.9 NiTiAl 0.1 , the microstructure of the alloy is based on Mg 2 Ni is the parent phase, and a large number of nanoscale strengthening phases are dispersed in the alloy, and the strengthening phase is a B2-NiTi intermetallic compound; wherein: the density of the alloy is 3.24g / cm 3 , the average specific yield strength is 324MPa·cm 3 / g, the average hardness of the alloy is 3.15GPa.

[0045] The low-density, ultra-high specific yield strength Mg-Ni-Ti-Al quaternary alloy described above in this embodiment is prepared by the following method, and the steps are as follows:

[0046] (1) Material preparation:

[0047] The high-purity (above 3.5N) Mg, Ni, Ti and Al metal powders used have a uniform particle size and should be less than 48 μm (300 mesh). The process control agent i...

Embodiment 2

[0056] A kind of low density, ultra-high specific yield strength Mg-Ni-Ti-Al quaternary alloy of the present embodiment, the chemical composition of described alloy is expressed as Mg by atomic ratio 1.9 NiTiAl 0.1 , the microstructure of the alloy is based on Mg 2 Ni is the parent phase, and a large number of nanoscale strengthening phases are dispersed in the alloy, and the strengthening phase is a B2-NiTi intermetallic compound; wherein: the density of the alloy is 3.24g / cm 3 , the average specific yield strength is 312.2MPa·cm 3 / g, the average hardness of the alloy is 3.03GPa.

[0057] The low-density, ultra-high specific yield strength Mg-Ni-Ti-Al quaternary alloy described above in this embodiment is prepared by the following method, and the steps are as follows:

[0058] (1) Material preparation:

[0059] The high-purity (above 3.5N) Mg, Ni, Ti and Al metal powders used have a uniform particle size and should be less than 48 μm (300 mesh). The process control agent...

Embodiment 3

[0066] A kind of low density, ultra-high specific yield strength Mg-Ni-Ti-Al quaternary alloy of the present embodiment, the chemical composition of described alloy is expressed as Mg by atomic ratio 1.9 NiTiAl 0.1 , the microstructure of the alloy is based on Mg 2 Ni is the parent phase, and a large number of nanoscale strengthening phases are dispersed in the alloy, and the strengthening phase is a B2-NiTi intermetallic compound; wherein: the density of the alloy is 3.16g / cm 3 , the average specific yield strength is 326MPa·cm 3 / g, the average hardness of the alloy is 3.12GPa.

[0067] The low-density, ultra-high specific yield strength Mg-Ni-Ti-Al quaternary alloy described above in this embodiment is prepared by the following method, and the steps are as follows:

[0068] (1) Material preparation:

[0069] The high-purity (above 3.5N) Mg, Ni, Ti and Al metal powders used have a uniform particle size and should be less than 48 μm (300 mesh). The process control agent i...

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Abstract

The invention discloses a Mg-Ni-Ti-Al quaternary alloy with low density and super high specific yield strength and a preparation method thereof, belonging to the technical field of multi-element alloy materials and processing thereof. The chemical composition of the alloy of the present invention is represented by atomic ratio as Mg 1.9 NiTiAl 0.1 , the microstructure of the alloy is based on Mg 2 Ni is the parent phase, and a large number of nanoscale strengthening phases are dispersed in the alloy, and the strengthening phase is B2-NiTi intermetallic compound, wherein: the density of the alloy is 3.24g / cm 3 , the specific yield strength is 324±11.8MPa·cm 3 / g, the hardness is 3.15±0.12GPa. The present invention combines composition design and heat treatment, and the prepared quaternary alloy has a uniform structure, and the present invention adopts a solid lipid process control agent and a suitable mechanical alloying process, and there is no cold welding phenomenon in the mechanical alloying process, which is very good Solved the problem of cold welding containing alloys with low melting point.

Description

technical field [0001] The invention belongs to the technical field of multi-element alloy materials and processing thereof, and in particular relates to a Mg-Ni-Ti-Al quaternary alloy with low density and super high specific yield strength and a preparation method thereof. Background technique [0002] Due to its high specific strength, excellent electrical and thermal conductivity, biocompatibility, damping resistance, easy processing, and easy recycling, lightweight magnesium (Mg) alloys are widely used in 3C fields, automotive industry, biomedicine, and aerospace. There are a wide range of applications in the field. In recent years, the rapid development of industries such as large aircraft, high-speed railways, and aerospace has put forward higher requirements for the development of lightweight and high-strength structural materials. Magnesium alloys with high specific strength have become one of the key new materials for development. [0003] Due to the shortcomings o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/04
CPCC22C30/00C22C1/047
Inventor 石俊林泽辉
Owner EAST CHINA UNIV OF TECH
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